{"pageNumber":"176","pageRowStart":"4375","pageSize":"25","recordCount":36989,"records":[{"id":70094208,"text":"ofr20071047SRP58 - 2007 - The Pan-African nappe tectonics in the Shackleton Range","interactions":[],"lastModifiedDate":"2014-02-18T15:36:38","indexId":"ofr20071047SRP58","displayToPublicDate":"2007-01-01T15:07:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-58","title":"The Pan-African nappe tectonics in the Shackleton Range","docAbstract":"In memory of Campbell Craddock: When J. Campbell Craddock (1972) published his famous 1:5 000 000 \nmap of the Geology of Antarctica, he established major units such as the East Antarctic Craton, the early Palaeozoic \nRoss, the Mesozoic Ellsworth, and the Cenozoic Andean orogens. It is already evident from this map, that the strike of \nthe Ellsworth Mountains and the Shackleton Range is perpendicular to palaeo-Pacific and modern Pacific margins. \nWhile the Ellsworth-Whitmore block is classified as a rotated terrane, the Ross-aged orogen of the Shackleton Range \nrequires another interpretation. The discovery of extended tectonic nappes with south directed transport in the southern \nShackleton Range and west transport in the north established a plate tectonic scenery with a subduction dominated Ross \nOrogen in the Transantarctic Mountains and a transpressive tectonic regime in the Shackleton Range during the final \nclosing of the Mozambique Ocean.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP58","usgsCitation":"Buggisch, W., and Kleinschmidt, G., 2007, The Pan-African nappe tectonics in the Shackleton Range: U.S. Geological Survey Open-File Report 2007-1047-SRP-58, 4 p., https://doi.org/10.3133/ofr20071047SRP58.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":282504,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp058/of2007-1047srp058.pdf"},{"id":282505,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP58.JPG"}],"otherGeospatial":"Antarctica;Shackleton Range","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -31.61,-81.28 ], [ -31.61,-80.13 ], [ -15.98,-80.13 ], [ -15.98,-81.28 ], [ -31.61,-81.28 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd7724e4b0b2908510b5ed","contributors":{"authors":[{"text":"Buggisch, W.","contributorId":52484,"corporation":false,"usgs":true,"family":"Buggisch","given":"W.","affiliations":[],"preferred":false,"id":490566,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kleinschmidt, Georg","contributorId":26968,"corporation":false,"usgs":true,"family":"Kleinschmidt","given":"Georg","email":"","affiliations":[],"preferred":false,"id":490565,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70074774,"text":"ofr20071047SRP032 - 2007 - Platinum-group elements in sills of the Jurassic Ferrar Large Igneous Province from Northern Victoria Land, Antarctica","interactions":[],"lastModifiedDate":"2014-02-03T15:09:19","indexId":"ofr20071047SRP032","displayToPublicDate":"2007-01-01T15:03:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-032","title":"Platinum-group elements in sills of the Jurassic Ferrar Large Igneous Province from Northern Victoria Land, Antarctica","docAbstract":"Platinum-group element (PGE) abundances were analysed in basaltic andesites and andesites from sills of the\nFerrar Large Igneous Province in northern Victoria Land. The strongly fractionated primitive mantle-normalised PGE-\npatterns show enrichment of the Pt-PGE over the Ir-PGE. The single element abundances exhibit good correlations with the degree of differentiation of the distinctly evolved samples and are interpreted to result mainly from low-pressure in-situ differentiation after magma emplacement in the upper crust. Compared to tholeiitic rocks from other magmatic\nprovinces, only the Ferrar rocks exhibit coupled enrichment of Pd, Pt and Cu even in most evolved samples. The\ndecrease of Pt and Pd in some of the more evolved samples does not necessarily signify sulphide fractionation, but may indicate the formation of other PGE-compounds. The inferred sulphur-undersaturated conditions during differentiation\nare in agreement with the high degrees of partial melting as well as the refractory nature of the proposed subcontinental lithospheric mantle source beneath this magmatic province","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP032","usgsCitation":"Hanemann, R., and Viereck-Goette, L., 2007, Platinum-group elements in sills of the Jurassic Ferrar Large Igneous Province from Northern Victoria Land, Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-032, 5 p., https://doi.org/10.3133/ofr20071047SRP032.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":281924,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP032.JPG"},{"id":281923,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp032/of2007-1047srp032.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 180.0,-90.0 ], [ 180.0,-60.0 ], [ -180.0,-60.0 ], [ -180.0,-90.0 ], [ 180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd6babe4b0b290851040f4","contributors":{"authors":[{"text":"Hanemann, R.","contributorId":35228,"corporation":false,"usgs":true,"family":"Hanemann","given":"R.","email":"","affiliations":[],"preferred":false,"id":489861,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Viereck-Goette, L.","contributorId":37641,"corporation":false,"usgs":true,"family":"Viereck-Goette","given":"L.","email":"","affiliations":[],"preferred":false,"id":489862,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70100457,"text":"ofr20071047SRP083 - 2007 - A dromaeosaur from the Maastrichtian of James Ross Island and the Late Cretaceous Antarctic dinosaur fauna","interactions":[],"lastModifiedDate":"2014-04-01T15:17:27","indexId":"ofr20071047SRP083","displayToPublicDate":"2007-01-01T14:51:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-083","title":"A dromaeosaur from the Maastrichtian of James Ross Island and the Late Cretaceous Antarctic dinosaur fauna","docAbstract":"The recovery of material of a small theropod from the Early Maastrichtian, Cape Lamb Member of the Snow \nHill Island Formation is an unusual occurrence from primarily marine sediments. The pedal morphology of the \nspecimen that includes a Metatarsal II with a lateral expansion caudal to Metatarsal III, a third metatarsal that is \nproximally narrow and distally wide, a Metatarsal III with a distal end that is incipiently ginglymoidal and a second \npedal digit with sickle-like ungual are all diagnostic of a theropod that belongs to the family of predatory dinosaurs, the \nDromaeosauridae. Yet this Antarctic dromaeosaur retains plesiomorphic features in its ankle and foot morphology. As \nnew dromaeosaur species are being recovered from the mid-Cretaceous of South America and the retention of primitive \ncharacters in the Antarctic dromaeosaur, a new biogeographic hypothesis on dromaeosaur distribution has been \ngenerated. Gondwanan dromaeosaurs are not North America immigrants into South America and Antarctica; rather \nthey are the relicts of a cosmopolitan dromaeosaur distribution, which has been separated by the vicariant break up of \nPangea and created an endemic clade of dromaeosaurs in Gondwana.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP083","usgsCitation":"Case, J.A., Martin, J.E., and Reguero, M., 2007, A dromaeosaur from the Maastrichtian of James Ross Island and the Late Cretaceous Antarctic dinosaur fauna: U.S. Geological Survey Open-File Report 2007-1047-SRP-083, 4 p., https://doi.org/10.3133/ofr20071047SRP083.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":285257,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP083.JPG"},{"id":285251,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp083/of2007-1047srp083.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53558fbee4b0120853e8bdf8","contributors":{"authors":[{"text":"Case, Judd A.","contributorId":11945,"corporation":false,"usgs":true,"family":"Case","given":"Judd","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":492229,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Martin, James E.","contributorId":93826,"corporation":false,"usgs":true,"family":"Martin","given":"James","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":492231,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Reguero, Marcelo","contributorId":50079,"corporation":false,"usgs":true,"family":"Reguero","given":"Marcelo","email":"","affiliations":[],"preferred":false,"id":492230,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70103193,"text":"ofr20071047SRP104 - 2007 - Multiple shallow level sill intrusions coupled with hydromagmatic explosive eruptions marked the initial phase of Ferrar large igneous province magmatism in northern Victoria Land, Antarctica","interactions":[],"lastModifiedDate":"2014-04-29T15:07:22","indexId":"ofr20071047SRP104","displayToPublicDate":"2007-01-01T14:50:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-104","title":"Multiple shallow level sill intrusions coupled with hydromagmatic explosive eruptions marked the initial phase of Ferrar large igneous province magmatism in northern Victoria Land, Antarctica","docAbstract":"Field data gathered during GANOVEX IX (2005/2006) in Northern Victoria Land, Antarctica, indicate that \nvolcaniclastic deposits of phreatomagmatic eruptions (so-called Exposure Hill Type events) are intercalated with fluvial \ndeposits of Triassic-Jurassic age at two stratigraphic levels. Abundant scoriaceous spatter (locally welded) indicates a \nhawaiian/strombolian component. Breccia-filled diatremes, from which volcaniclastic deposits were sourced, are rooted \nin sills which intruded wet sediments. The deposits are thus subaerial expressions of initial Ferrar magmatism involving \nintrusion of multiple shallow-level sills. Due to magma-sediment interaction abundant clastic dikes are developed that \nintrude the sediments and sills. All igneous components in the volcaniclastic deposits are andesitic in composition, as \nare the chilled margins of the sills. They are more differentiated than the basaltic andesites of the younger effusive \nsection of Kirkpatrick plateau lavas which in northern Victoria Land start with pillow lavas and small volume lava \nflows from volcanic necks.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP104","usgsCitation":"Viereck-Goette, L., Schoner, R., Bomfleur, B., and Schneider, J., 2007, Multiple shallow level sill intrusions coupled with hydromagmatic explosive eruptions marked the initial phase of Ferrar large igneous province magmatism in northern Victoria Land, Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-104, 5 p., https://doi.org/10.3133/ofr20071047SRP104.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":286785,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP104.JPG"},{"id":286784,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp104/of2007-1047srp104.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5360c9f0e4b082a3ecf53e1e","contributors":{"authors":[{"text":"Viereck-Goette, L.","contributorId":37641,"corporation":false,"usgs":true,"family":"Viereck-Goette","given":"L.","email":"","affiliations":[],"preferred":false,"id":493205,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schoner, R.","contributorId":97004,"corporation":false,"usgs":true,"family":"Schoner","given":"R.","email":"","affiliations":[],"preferred":false,"id":493208,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bomfleur, B.","contributorId":54116,"corporation":false,"usgs":true,"family":"Bomfleur","given":"B.","email":"","affiliations":[],"preferred":false,"id":493206,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Schneider, J.","contributorId":85546,"corporation":false,"usgs":true,"family":"Schneider","given":"J.","email":"","affiliations":[],"preferred":false,"id":493207,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70068941,"text":"ofr20071047SRP015 - 2007 - Geoenvironments from the vicinity of Arctowski Station, Admiralty Bay, King George Island, Antarctica: vulnerability and valuation assessment","interactions":[],"lastModifiedDate":"2014-01-13T15:03:42","indexId":"ofr20071047SRP015","displayToPublicDate":"2007-01-01T14:47:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-015","title":"Geoenvironments from the vicinity of Arctowski Station, Admiralty Bay, King George Island, Antarctica: vulnerability and valuation assessment","docAbstract":"The use of a geographic information system (GIS) allows the mapping and quantification of biotic and \nphysical features of importance to the environmental planning of Antarctic areas. In this paper we examined the main \naspects of the geoenvironments of Arctowski Station vicinity (Admiralty bay, Maritime Antartica), by means of a \nphotointerpretation of an orthomosaic at 1:6000 scale, produced by non-conventional aerial photographs obtained by the \nBrazilian Cryosols project. We carried out a preliminary environmental valuation and vulnerability assessment of the \narea. Hence, geoenvironments were classified and ranked according with their biological valuation and vulnerability \n(fragility), mapping 20 units covering approximately 150 ha. The most fragile geoenvironmental units were former and \npresent penguin rookeries with different vegetation covers, all very prone to degradation by over-trampling and human \nperturbations. The relationships between each geoenvironment were also explored, emphasizing the ecological aspects \nand their valuation. In quantitative terms, the most vulnerable and fragile units (classes 4 and 5) occupy nearly 22 % of \nthe total area, being highly concentrated near the coastal areas. There, ornithogenic input is an important factor favoring \nthe vegetation development.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP015","usgsCitation":"Schaefer, C.E., Santana, R.M., Simas, F.N., Francelino, M.R., Filho, E.I., Albuquerque, M.A., and Calijuri, M.L., 2007, Geoenvironments from the vicinity of Arctowski Station, Admiralty Bay, King George Island, Antarctica: vulnerability and valuation assessment: U.S. Geological Survey Open-File Report 2007-1047-SRP-015, 4 p., https://doi.org/10.3133/ofr20071047SRP015.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":280916,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP015.JPG"},{"id":280914,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp015/index.html"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd5b19e4b0b290850f9c83","contributors":{"authors":[{"text":"Schaefer, Carlos Ernesto G.R.","contributorId":17135,"corporation":false,"usgs":true,"family":"Schaefer","given":"Carlos","email":"","middleInitial":"Ernesto G.R.","affiliations":[],"preferred":false,"id":488192,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Santana, Rogerio Mercandelle","contributorId":104806,"corporation":false,"usgs":true,"family":"Santana","given":"Rogerio","email":"","middleInitial":"Mercandelle","affiliations":[],"preferred":false,"id":488198,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Simas, Felipe Nogueira Bello","contributorId":78241,"corporation":false,"usgs":true,"family":"Simas","given":"Felipe","email":"","middleInitial":"Nogueira Bello","affiliations":[],"preferred":false,"id":488195,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Francelino, Marcio R.","contributorId":32821,"corporation":false,"usgs":true,"family":"Francelino","given":"Marcio","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":488193,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Filho, Elpidio Inacio Fernandes","contributorId":38468,"corporation":false,"usgs":true,"family":"Filho","given":"Elpidio","email":"","middleInitial":"Inacio Fernandes","affiliations":[],"preferred":false,"id":488194,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Albuquerque, Miriam Abreu","contributorId":81012,"corporation":false,"usgs":true,"family":"Albuquerque","given":"Miriam","email":"","middleInitial":"Abreu","affiliations":[],"preferred":false,"id":488196,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Calijuri, Maria Lucia","contributorId":93816,"corporation":false,"usgs":true,"family":"Calijuri","given":"Maria","email":"","middleInitial":"Lucia","affiliations":[],"preferred":false,"id":488197,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70094201,"text":"ofr20071047SRP057 - 2007 - Distribution and origin of authigenic smectite clays in Cape Roberts Project Core 3, Victoria Land Basin, Antarctica","interactions":[],"lastModifiedDate":"2014-02-18T15:03:39","indexId":"ofr20071047SRP057","displayToPublicDate":"2007-01-01T14:46:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-057","title":"Distribution and origin of authigenic smectite clays in Cape Roberts Project Core 3, Victoria Land Basin, Antarctica","docAbstract":"Of some 800 m of lower Oligocene marine sediments cored continuously from the seafloor in the Victoria \nLand Basin of Antarctica at Cape Roberts Site CRP-3, the lower 500 m exhibit authigenic smectite clay coats on \nshallow-water sandstone grains. A scanning electron microscope/EDS study of 46 fracture sections confirms that the \ndistribution of the clay coats through the unit is not uniform or evenly distributed, but rather varies with depth, original \nporosity, and the kinds and abundance of source materials. Our results suggest that smectite emplacement resulted from \nin-situ, low-temperature burial diagenesis rather than hydrothermal or fault-focused thermobaric fluids.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP057","usgsCitation":"Priestas, A., and Wise, S., 2007, Distribution and origin of authigenic smectite clays in Cape Roberts Project Core 3, Victoria Land Basin, Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-057, Report: 5 p.; Plate 1: 3 p.; Place 2: 6 p., https://doi.org/10.3133/ofr20071047SRP057.","productDescription":"Report: 5 p.; Plate 1: 3 p.; Place 2: 6 p.","additionalOnlineFiles":"Y","costCenters":[],"links":[{"id":282498,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP057.JPG"},{"id":282496,"type":{"id":7,"text":"Companion Files"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp057/of2007-1047srp057_plate1.pdf"},{"id":282495,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp057/of2007-1047srp057.pdf"},{"id":282497,"type":{"id":7,"text":"Companion Files"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp057/of2007-1047srp057_plate2.pdf"}],"otherGeospatial":"Antarctica;Victoria Land","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 149.96,-79.11 ], [ 149.96,-70.28 ], [ 170.34,-70.28 ], [ 170.34,-79.11 ], [ 149.96,-79.11 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd5574e4b0b290850f651e","contributors":{"authors":[{"text":"Priestas, A.W.","contributorId":82217,"corporation":false,"usgs":true,"family":"Priestas","given":"A.W.","email":"","affiliations":[],"preferred":false,"id":490556,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wise, S.W.","contributorId":30543,"corporation":false,"usgs":true,"family":"Wise","given":"S.W.","affiliations":[],"preferred":false,"id":490555,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70074768,"text":"ofr20071047SRP031 - 2007 - Unconsolidated sediments at the bottom of Lake Vostok from seismic data","interactions":[],"lastModifiedDate":"2014-02-03T15:01:40","indexId":"ofr20071047SRP031","displayToPublicDate":"2007-01-01T14:41:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-031","title":"Unconsolidated sediments at the bottom of Lake Vostok from seismic data","docAbstract":"Seismic soundings of Lake Vostok have been performed by the Polar Marine Geological Research \nExpedition in collaboration with the Russian Antarctic Expedition since the early 1990s. The seismograms recorded \nshow at least two relatively closely spaced reflections associated with the lake bottom. These were initially interpreted \nas boundaries of a layer of unconsolidated sediments at the bottom of the lake. A more recent interpretation suggests \nthat the observed reflections are side echoes from the rough lake bottom, and that there are no unconsolidated sediments \nat the bottom of the lake. The major goal of this paper is to reveal the nature of those reflections by testing three \nhypotheses of their origin. The results show that some of the reflections, but not all of them, are consistent with the \nhypothesis of a non-flat lake bottom along the source-receiver line (2D case). The reflections were also evaluated as \nside echoes from an adjacent sloping interface, but these tests implied unreasonably steep slopes (at least 8 degrees) at \nthe lake bottom. The hypothesis that is the most compatible with seismic data is the presence of a widespread layer of \nunconsolidated sediments at the bottom of Lake Vostok. The modeling suggests the presence of a two hundred meter \nthick sedimentary layer with a seismic velocity of 1700 -1900 m/sec in the southern and middle parts of the lake. The \nsedimentary layer thickens in the northern basin to ~350 m","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP031","usgsCitation":"Filina, I., Lukin, V., Masolov, V., and Blankenship, D., 2007, Unconsolidated sediments at the bottom of Lake Vostok from seismic data: U.S. Geological Survey Open-File Report 2007-1047-SRP-031, 5 p., https://doi.org/10.3133/ofr20071047SRP031.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":281921,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP031.JPG"},{"id":281918,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp031/of2007-1047srp031.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 180.0,-90.0 ], [ 180.0,-60.0 ], [ -180.0,-60.0 ], [ -180.0,-90.0 ], [ 180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd7a29e4b0b2908510d4dd","contributors":{"authors":[{"text":"Filina, I.","contributorId":80585,"corporation":false,"usgs":true,"family":"Filina","given":"I.","email":"","affiliations":[],"preferred":false,"id":489851,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lukin, V.","contributorId":47696,"corporation":false,"usgs":true,"family":"Lukin","given":"V.","email":"","affiliations":[],"preferred":false,"id":489850,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Masolov, Valery","contributorId":102788,"corporation":false,"usgs":true,"family":"Masolov","given":"Valery","email":"","affiliations":[],"preferred":false,"id":489852,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Blankenship, D.","contributorId":108260,"corporation":false,"usgs":true,"family":"Blankenship","given":"D.","affiliations":[],"preferred":false,"id":489853,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70103040,"text":"ofr20071047SRP096 - 2007 - Morphotectonic architecture of the Transantarctic Mountains rift flank between the Royal Society Range and the Churchill Mountains based on geomorphic analysis","interactions":[],"lastModifiedDate":"2014-04-29T10:13:34","indexId":"ofr20071047SRP096","displayToPublicDate":"2007-01-01T14:34:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-096","title":"Morphotectonic architecture of the Transantarctic Mountains rift flank between the Royal Society Range and the Churchill Mountains based on geomorphic analysis","docAbstract":"Extensional forces within the Antarctic Plate have produced the Transantarctic Mountains rift-flank uplift \nalong the West Antarctic rift margin. Large-scale linear morphologic features within the mountains are controlled by \nbedrock structure and can be recognized and mapped from satellite imagery and digital elevation models (DEMs). This \nstudy employed the Antarctic Digital Database DEM to obtain slope steepness and aspect maps of the Transantarctic \nMountains (TAM) between the Royal Society Range and the Churchill Mountains, allowing definition of the position \nand orientation of the morphological axis of the rift-flank. The TAM axis, interpreted as a fault-controlled escarpment \nformed by coast-parallel retreat, provides a marker for the orientation of the faulted boundary between the TAM and the \nrift system. Changes in position and orientation of the TAM axis suggests the rift flank is segmented into tectonic \nblocks bounded by relay ramps and transverse accommodation zones. The transverse boundaries coincide with major \noutlet glaciers, supporting interpretation of rift structures between them. The pronounced morphological change across \nByrd Glacier points to control by structures inherited from the Ross orogen.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP096","usgsCitation":"Demyanick, E., and Wilson, T.J., 2007, Morphotectonic architecture of the Transantarctic Mountains rift flank between the Royal Society Range and the Churchill Mountains based on geomorphic analysis: U.S. Geological Survey Open-File Report 2007-1047-SRP-096, 6 p., https://doi.org/10.3133/ofr20071047SRP096.","productDescription":"6 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":286759,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP096.JPG"},{"id":286758,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp096/of2007-1047srp096.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 180.0,-90.0 ], [ 180.0,-60.0 ], [ -180.0,-60.0 ], [ -180.0,-90.0 ], [ 180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5360c9f0e4b082a3ecf53e1a","contributors":{"authors":[{"text":"Demyanick, Elizabeth","contributorId":34051,"corporation":false,"usgs":true,"family":"Demyanick","given":"Elizabeth","email":"","affiliations":[],"preferred":false,"id":493119,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilson, Terry J.","contributorId":83843,"corporation":false,"usgs":true,"family":"Wilson","given":"Terry","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":493120,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70068932,"text":"ofr20071047SRP014 - 2007 - Insight into the geology of the East Antarctic hinterland: a study of sediment inclusions from ice cores of the Lake Vostok borehole","interactions":[],"lastModifiedDate":"2014-01-13T14:40:06","indexId":"ofr20071047SRP014","displayToPublicDate":"2007-01-01T14:33:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-014","title":"Insight into the geology of the East Antarctic hinterland: a study of sediment inclusions from ice cores of the Lake Vostok borehole","docAbstract":"The borehole at the southern part of subglacial Lake Vostok has been drilled into an ice layer that has been\nrefrozen from the lake water. This ice layer contains random sediment inclusions, eight of which have been studied \nusing state-of the-art analytical techniques. Six inclusions comprise soft aggregates consisting mainly of clay-mica \nminerals and micron-sized quartz grains while two others are solid clasts of fine-grained cemented rocks. The largest \nrock clast consists of poorly-rounded quartz and minor amounts of accessory minerals and is classified as quartzose \nsiltstone. More than twenty grains of zircon and monazite have been identified in this siltstone and dated by SIMS \nSHRIMP-II. Two age clusters have been recognized for these detrital grains, in the ranges 0.8−1.2 Ga and 1.6−1.8 Ga. \nThe compositions of the rock clasts suggest that the bedrock situated to the west of Lake Vostok is sedimentary. The \nage data on the detrital accessory minerals suggest that the provenance of these sedimentary rocks − the Gamburtsev \nMountains and Vostok Subglacial Highlands, is mainly represented by Paleoproterozoic and MesoproterozoicNeoproterozoic crustal provinces","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP014","usgsCitation":"Leitchenkov, G., Belyatsky, B., Rodionov, N., and Sergeev, S., 2007, Insight into the geology of the East Antarctic hinterland: a study of sediment inclusions from ice cores of the Lake Vostok borehole: U.S. Geological Survey Open-File Report 2007-1047-SRP-014, 4 p., https://doi.org/10.3133/ofr20071047SRP014.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":280912,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP014.JPG"},{"id":280911,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp014/of2007-1047srp014.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd62a5e4b0b290850fe510","contributors":{"authors":[{"text":"Leitchenkov, G.L.","contributorId":70126,"corporation":false,"usgs":true,"family":"Leitchenkov","given":"G.L.","email":"","affiliations":[],"preferred":false,"id":488190,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Belyatsky, B.V.","contributorId":30907,"corporation":false,"usgs":true,"family":"Belyatsky","given":"B.V.","email":"","affiliations":[],"preferred":false,"id":488188,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rodionov, N.V.","contributorId":38893,"corporation":false,"usgs":true,"family":"Rodionov","given":"N.V.","email":"","affiliations":[],"preferred":false,"id":488189,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sergeev, S.A.","contributorId":76584,"corporation":false,"usgs":true,"family":"Sergeev","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":488191,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70100451,"text":"ofr20071047SRP082 - 2007 - Ovule-bearing reproductive organs of the glossopterid seed ferns from the Late Permian of the Beardmore Glacier region, Antarctica","interactions":[],"lastModifiedDate":"2014-04-01T14:45:27","indexId":"ofr20071047SRP082","displayToPublicDate":"2007-01-01T14:30:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-082","title":"Ovule-bearing reproductive organs of the glossopterid seed ferns from the Late Permian of the Beardmore Glacier region, Antarctica","docAbstract":"The Glossopteridales are an extinct group of seed ferns that dominated Gondwana during the Permian. The\nstrap-shaped leaves of Glossopteris are widespread and provided early evidence of continental drift, but reproductive\norgans of this group have remained enigmatic since they were first described in the 1950s. Based on compression-\nimpression fossils, there are at least two basic types of ovulate (seed-bearing) organs. In one form, numerous ovules are\nborne on the surface of a leaf-like megasporophyll (e.g., Plumsteadia, Dictyopteridium), while the second type consists\nof stalked, apparently uniovulate cupules borne on a branching system (e.g., Lidgettonia). More than 30 genera of seed-\nbearing organs have been described, many based on compressions or, more commonly, impression fossils, in which it is often impossible to discern the three-dimensional morphology or attachment of these structures. Both morphological types have now been found in permineralized peat from Skaar Ridge, central Transantarctic Mountains (CTM), and provide some of the first anatomical detail of the diversity of reproductive organs of Glossopteris. The multiovulate\norgan is small (6 mm wide), with ovules borne on the upper (adaxial) surface; the uniovulate structure consists of four\nstalked cupules, each containing a single ovule about 2 mm long. These two forms provide important information about\nthe diversity of the glossopterids and their status as a natural group of seed plants.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP082","usgsCitation":"Taylor, E., Taylor, T., and Ryberg, P., 2007, Ovule-bearing reproductive organs of the glossopterid seed ferns from the Late Permian of the Beardmore Glacier region, Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-082, 4 p., https://doi.org/10.3133/ofr20071047SRP082.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":285242,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP082.JPG"},{"id":285241,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp082/of2007-1047srp082.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"535594e6e4b0120853e8c0c5","contributors":{"authors":[{"text":"Taylor, E.L.","contributorId":98219,"corporation":false,"usgs":true,"family":"Taylor","given":"E.L.","email":"","affiliations":[],"preferred":false,"id":492227,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Taylor, T.N.","contributorId":24910,"corporation":false,"usgs":true,"family":"Taylor","given":"T.N.","email":"","affiliations":[],"preferred":false,"id":492226,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ryberg, P.E.","contributorId":7188,"corporation":false,"usgs":true,"family":"Ryberg","given":"P.E.","email":"","affiliations":[],"preferred":false,"id":492225,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70094200,"text":"ofr20071047SRP056 - 2007 - Airborne geophysics as a tool for geoscientific research in Antarctica: some recent examples","interactions":[],"lastModifiedDate":"2014-02-18T14:37:50","indexId":"ofr20071047SRP056","displayToPublicDate":"2007-01-01T14:25:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-056","title":"Airborne geophysics as a tool for geoscientific research in Antarctica: some recent examples","docAbstract":"The polar regions play an important role in Earth's geodynamic and climatic systems. Modern airborne\ngeophysical surveys combine radio-echo sounding, aeromagnetic and aerogravity methods to explore the geology of\nthese regions. This paper reviews some recent aerogeophysical investigations undertaken by the British Antarctic\nSurvey to: 1) Image subglacial rifts of Jurassic age in western Dronning Maud Land, which were associated with early\nGondwana break-up; 2) Investigate crustal growth over the Antarctic Peninsula by Cretaceous arc magmatism and\nterrane accretion along the paleo-Pacific margin of Gondwana; 3) Analyse geological boundary conditions for presentday\nice dynamics over Coats Land.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP056","usgsCitation":"Ferraccioli, F., Jones, P., Leat, P., and Jordan, T., 2007, Airborne geophysics as a tool for geoscientific research in Antarctica: some recent examples: U.S. Geological Survey Open-File Report 2007-1047-SRP-056, 4 p., https://doi.org/10.3133/ofr20071047SRP056.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":282494,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP056.JPG"},{"id":282493,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp056/of2007-1047srp056.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd4c0fe4b0b290850f0bd7","contributors":{"authors":[{"text":"Ferraccioli, Fausto","contributorId":43591,"corporation":false,"usgs":true,"family":"Ferraccioli","given":"Fausto","email":"","affiliations":[],"preferred":false,"id":490552,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jones, P.C.","contributorId":70281,"corporation":false,"usgs":true,"family":"Jones","given":"P.C.","email":"","affiliations":[],"preferred":false,"id":490553,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Leat, P.","contributorId":13540,"corporation":false,"usgs":true,"family":"Leat","given":"P.","affiliations":[],"preferred":false,"id":490551,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jordan, T.A.","contributorId":101183,"corporation":false,"usgs":true,"family":"Jordan","given":"T.A.","email":"","affiliations":[],"preferred":false,"id":490554,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70068929,"text":"ofr20071047SRP013 - 2007 - Upper mantle anisotropy from teleseismic SKS splitting beneath Lützow-Holm Bay Region, East Antarctica","interactions":[],"lastModifiedDate":"2014-01-13T14:28:26","indexId":"ofr20071047SRP013","displayToPublicDate":"2007-01-01T14:19:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-013","title":"Upper mantle anisotropy from teleseismic SKS splitting beneath Lützow-Holm Bay Region, East Antarctica","docAbstract":"Investigations of SKS wave splitting of teleseismic events from digital seismographs recorded at eight stations \naround the Lützow-Holm Bay Region have lead to understanding the evolution of the Antarctic Plate. The observed delay \ntimes of SKS splitting are up to 1.3 s, which are generally equal to the global average. A two-layer model reveals that the \nlower layer anisotropy is caused by the recent asthenospheric flow, as compared with the Absolute Plate Motion by the \nHS3-NUVEL1 model. The upper layer anisotropy corresponds well to polarization of NE–SW convergence direction \nbetween East and West Gondwana in Pan-African age. We suggest that the upper layer anisotropy was formed during \nPan-African orogeny and was possibly influenced by the preexisting structure during Gondwana break-up. The origin of \nanisotropy is the Lattice Preferred Orientation of olivine which was caused by both paleo-tectonic events and the recent \nasthenospheric flow.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP013","usgsCitation":"Usui, Y., Kanao, M., Kubo, A., Hiramatsu, Y., and Negishi, H., 2007, Upper mantle anisotropy from teleseismic SKS splitting beneath Lützow-Holm Bay Region, East Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-013, 4 p., https://doi.org/10.3133/ofr20071047SRP013.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":280909,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP013.JPG"},{"id":280907,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp013/of2007-1047srp013.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd7a5be4b0b2908510d6f0","contributors":{"authors":[{"text":"Usui, Y.","contributorId":68219,"corporation":false,"usgs":true,"family":"Usui","given":"Y.","email":"","affiliations":[],"preferred":false,"id":488177,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kanao, M.","contributorId":62929,"corporation":false,"usgs":true,"family":"Kanao","given":"M.","email":"","affiliations":[],"preferred":false,"id":488176,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kubo, A.","contributorId":84131,"corporation":false,"usgs":true,"family":"Kubo","given":"A.","email":"","affiliations":[],"preferred":false,"id":488178,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hiramatsu, Y.","contributorId":92581,"corporation":false,"usgs":true,"family":"Hiramatsu","given":"Y.","email":"","affiliations":[],"preferred":false,"id":488179,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Negishi, H.","contributorId":40899,"corporation":false,"usgs":true,"family":"Negishi","given":"H.","email":"","affiliations":[],"preferred":false,"id":488175,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70103185,"text":"ofr20071047SRP103 - 2007 - Regolith transport in the Dry Valleys of Antarctica","interactions":[],"lastModifiedDate":"2014-04-29T14:43:44","indexId":"ofr20071047SRP103","displayToPublicDate":"2007-01-01T14:17:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-103","title":"Regolith transport in the Dry Valleys of Antarctica","docAbstract":"The stability of ground surface and preservation of landforms that record past events and environments is of \ngreat importance as the geologic and climatic history is evaluated in the Dry Valleys of Antarctica. Currently little is \nknown about the regolith transport that tends to eradicate and confound this record and regolith transport is itself an \nenvironmental indicator. Based on analyses of repeat photographs, soil traps, and pebble transport distances, it was \nfound that there is a large spatial variation in topographic diffusivities at least in the annual basis and that counter \nintuitively the highest topographic diffusivities are found in the alpine valleys that are located farther inland from the \ncoast where the lowest topographic diffusivities were recorded. An average topographic diffusivity for the Dry Valleys \nwas determined to be 10M<sup>-5</sup>–10<sup>-4</sup> m<sup>2</sup>\n/yr. This average topographic diffusivity is surprisingly large, equaling or bordering \nthe smallest values from elsewhere on Earth","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP103","usgsCitation":"Putkonen, J., Rosales, M., Turpen, N., Morgan, D., Balco, G., and Donaldson, M., 2007, Regolith transport in the Dry Valleys of Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-103, 5 p., https://doi.org/10.3133/ofr20071047SRP103.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":286779,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP103.JPG"},{"id":286778,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp103/of2007-1047srp103.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5360c9f5e4b082a3ecf53e2c","contributors":{"authors":[{"text":"Putkonen, J.","contributorId":91021,"corporation":false,"usgs":true,"family":"Putkonen","given":"J.","email":"","affiliations":[],"preferred":false,"id":493202,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rosales, M.","contributorId":35236,"corporation":false,"usgs":true,"family":"Rosales","given":"M.","email":"","affiliations":[],"preferred":false,"id":493198,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Turpen, N.","contributorId":22251,"corporation":false,"usgs":true,"family":"Turpen","given":"N.","email":"","affiliations":[],"preferred":false,"id":493197,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Morgan, D.","contributorId":67413,"corporation":false,"usgs":true,"family":"Morgan","given":"D.","affiliations":[],"preferred":false,"id":493201,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Balco, G.","contributorId":44317,"corporation":false,"usgs":true,"family":"Balco","given":"G.","affiliations":[],"preferred":false,"id":493199,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Donaldson, M.","contributorId":48874,"corporation":false,"usgs":true,"family":"Donaldson","given":"M.","email":"","affiliations":[],"preferred":false,"id":493200,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70074763,"text":"ofr20071047SRP030 - 2007 - Geology of the Byrd Glacier Discontinuity (Ross Orogen): New survey data from the Britannia Range, Antarctica","interactions":[],"lastModifiedDate":"2014-02-03T14:27:57","indexId":"ofr20071047SRP030","displayToPublicDate":"2007-01-01T14:14:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-030","title":"Geology of the Byrd Glacier Discontinuity (Ross Orogen): New survey data from the Britannia Range, Antarctica","docAbstract":"Field activities in the Britannia Range (Transantarctic Mountains, Antarctica) highlighted new geological \nfeatures around the so-called Byrd Glacier discontinuity. Recent field surveys revealed the occurrence of significant \namounts of medium- to high-grade metamorphic rocks, intruded by abundant coarse-grained porphyritic granitoids. \nMost of the granitoids are deformed, with foliation parallel to the regional foliation in the metamorphics. Two main \nepisodes of deformation are observed. Tight to isoclinal folds and penetrative axial plane foliation are related to the D1 \nphase, open folds to the D2. The main foliation (D1) trends nearly E-W in agreement with the trend in the southern \nportion of the Byrd Glacier. In most outcrops, granitic dykes are folded and stretched by the D2 deformation, which \nshows similar characteristics with the D2 deformation south of the Byrd Glacier. This suggests the occurrence in the \nRoss orogen of an orogen-normal structure south and north of the Byrd Glacier.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP030","usgsCitation":"Carosi, R., Giacomini, F., Talarico, F., and Stump, E., 2007, Geology of the Byrd Glacier Discontinuity (Ross Orogen): New survey data from the Britannia Range, Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-030, 6 p., https://doi.org/10.3133/ofr20071047SRP030.","productDescription":"6 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":281911,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp030/of2007-1047srp030.pdf"},{"id":281913,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP030.JPG"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 180.0,-90.0 ], [ 180.0,-60.0 ], [ -180.0,-60.0 ], [ -180.0,-90.0 ], [ 180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd5e31e4b0b290850fb87a","contributors":{"authors":[{"text":"Carosi, R.","contributorId":24681,"corporation":false,"usgs":true,"family":"Carosi","given":"R.","email":"","affiliations":[],"preferred":false,"id":489842,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Giacomini, F.","contributorId":22241,"corporation":false,"usgs":true,"family":"Giacomini","given":"F.","email":"","affiliations":[],"preferred":false,"id":489841,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Talarico, F.","contributorId":84585,"corporation":false,"usgs":true,"family":"Talarico","given":"F.","email":"","affiliations":[],"preferred":false,"id":489844,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stump, E.","contributorId":63303,"corporation":false,"usgs":true,"family":"Stump","given":"E.","email":"","affiliations":[],"preferred":false,"id":489843,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70100446,"text":"ofr20071047SRP081 - 2007 - Paleobotany of Livingston Island: The first report of a Cretaceous fossil flora from Hannah Point","interactions":[],"lastModifiedDate":"2014-04-01T14:29:50","indexId":"ofr20071047SRP081","displayToPublicDate":"2007-01-01T14:13:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-081","title":"Paleobotany of Livingston Island: The first report of a Cretaceous fossil flora from Hannah Point","docAbstract":"This is the first report of a fossil flora from Hannah Point, Livingston Island, South Shetland Islands, \nAntarctica. The fossiliferous content of an outcrop, located between two igneous rock units of Cretaceous age are \nmainly composed of leaf imprints and some fossil trunks. The leaf assemblage consists of 18 taxa of Pteridophyta, \nPinophyta and one angiosperm. The plant assemblage can be compared to other Early Cretaceous floras from the South \nShetland Islands, but several taxa have an evidently Late Cretaceous affinity. A Coniacian-Santonian age is the most \nprobable age for the outcrops, supported by previous K/Ar isotopic studies of the basalts over and underlying the \nfossiliferous sequence","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP081","usgsCitation":"Leppe, M., Michea, W., Munoz, C., Palma-Heldt, S., and Fernandoy, F., 2007, Paleobotany of Livingston Island: The first report of a Cretaceous fossil flora from Hannah Point: U.S. Geological Survey Open-File Report 2007-1047-SRP-081, 4 p., https://doi.org/10.3133/ofr20071047SRP081.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":285237,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP081.JPG"},{"id":285236,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp081/of2007-1047srp081.pdf"}],"otherGeospatial":"Antarctica;Hannah Point","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -60.620670,-62.657590 ], [ -60.620670,-62.631244 ], [ -60.540676,-62.631244 ], [ -60.540676,-62.657590 ], [ -60.620670,-62.657590 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"535594e7e4b0120853e8c0c9","contributors":{"authors":[{"text":"Leppe, M.","contributorId":41742,"corporation":false,"usgs":true,"family":"Leppe","given":"M.","email":"","affiliations":[],"preferred":false,"id":492223,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Michea, W.","contributorId":38898,"corporation":false,"usgs":true,"family":"Michea","given":"W.","email":"","affiliations":[],"preferred":false,"id":492222,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Munoz, C.","contributorId":107612,"corporation":false,"usgs":true,"family":"Munoz","given":"C.","email":"","affiliations":[],"preferred":false,"id":492224,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Palma-Heldt, S.","contributorId":35648,"corporation":false,"usgs":true,"family":"Palma-Heldt","given":"S.","email":"","affiliations":[],"preferred":false,"id":492221,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Fernandoy, F.","contributorId":23438,"corporation":false,"usgs":true,"family":"Fernandoy","given":"F.","email":"","affiliations":[],"preferred":false,"id":492220,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70094759,"text":"ofr20071047SRP063 - 2007 - The Cambrian Ross Orogeny in northern Victoria Land (Antarctica) and New Zealand: A synthesis","interactions":[],"lastModifiedDate":"2014-02-24T15:30:27","indexId":"ofr20071047SRP063","displayToPublicDate":"2007-01-01T14:06:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-063","title":"The Cambrian Ross Orogeny in northern Victoria Land (Antarctica) and New Zealand: A synthesis","docAbstract":"In the Cambrian, the paleo-Pacific margin of the Gondwana supercontinent included East Antarctica, \nAustralia, Tasmania and New Zealand and was affected by themajor Ross-Delamerian Orogeny. In Antarctica, \nevidence suggests that this resulted from oblique subduction and that in northern Victoria Land it was accompanied by \nthe opening and subsequent closure of a back-arc basin. Comparison of the type and timing of sedimentary, magmatic \nand metamorphic events in areas noted above shows strong similarities between northern Victoria Land and New \nZealand. In both regions Middle Cambrian volcanites are interpreted as arc/back-arc assemblages produced by west-directed subduction; sediments interbedded with the volcanites show provenance both from the arc and from the \nGondwana margin and therefore place the basin close to the continent. Back-arc closure in the Late Cambrian was \nlikely accomplished through a second subduction system","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP063","usgsCitation":"Federico, L., Capponi, G., Crispini, L., and Bradshaw, J., 2007, The Cambrian Ross Orogeny in northern Victoria Land (Antarctica) and New Zealand: A synthesis: U.S. Geological Survey Open-File Report 2007-1047-SRP-063, 5 p., https://doi.org/10.3133/ofr20071047SRP063.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":282710,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP063.png"},{"id":282704,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp063/of2007-1047srp063.pdf"}],"otherGeospatial":"Antarctica;Victoria Land","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 149.96,-79.11 ], [ 149.96,-70.28 ], [ 170.34,-70.28 ], [ 170.34,-79.11 ], [ 149.96,-79.11 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd76d2e4b0b2908510b270","contributors":{"authors":[{"text":"Federico, L.","contributorId":71878,"corporation":false,"usgs":true,"family":"Federico","given":"L.","email":"","affiliations":[],"preferred":false,"id":490876,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Capponi, G.","contributorId":85498,"corporation":false,"usgs":true,"family":"Capponi","given":"G.","email":"","affiliations":[],"preferred":false,"id":490877,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Crispini, L.","contributorId":41734,"corporation":false,"usgs":true,"family":"Crispini","given":"L.","email":"","affiliations":[],"preferred":false,"id":490874,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bradshaw, J.D.","contributorId":48324,"corporation":false,"usgs":true,"family":"Bradshaw","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":490875,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70094193,"text":"ofr20071047SRP055 - 2007 - Break-up of Gondwana and opening of the South Atlantic: Review of existing plate tectonic models","interactions":[],"lastModifiedDate":"2014-02-18T14:14:41","indexId":"ofr20071047SRP055","displayToPublicDate":"2007-01-01T14:05:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-055","title":"Break-up of Gondwana and opening of the South Atlantic: Review of existing plate tectonic models","docAbstract":"The opening history of both the Weddell Sea and South Atlantic Ocean is critical to understanding the break-\nup of Gondwana and the evolution of Antarctica since Early Jurassic times. The dispersal of the Gondwanide fragments\nis important to understanding the development of past ocean circulation. Unfortunately the tectonics of the Weddell Sea\nregion is difficult to resolve because of the paucity of data coverage and the region’s inherent complexity. Although\nconsiderable progress has been achieved in the past 20 years with new marine aeromagnetic data and satellite derived\ngravity anomaly maps, there are still several models in consideration which differ in crustal ages and schemes of opening. In this paper we present a review of four of those models. Focusing on poles of rotation, synthetic isochrons and\nflowlines, we proceed backward in time beginning at Chron 34 (83.5 Ma), as it is relatively well defined ocean wide,\nand present crustal age maps that display the estimated trace of the South America-Antarctica-Africa triple junction for\neach model. We also plot reconstructions at four selected epochs for all models using the same projection and scale to facilitate comparison. The diverse simplifying assumptions that need to be made in every case regarding plate fragmentation to account for the numerous syn-rift basins and periods of stretching are strong indicators that rigid plate tectonics is too simple a model for the present problem.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP055","usgsCitation":"Ghidella, M., Lawver, L., and Gahagan, L., 2007, Break-up of Gondwana and opening of the South Atlantic: Review of existing plate tectonic models: U.S. Geological Survey Open-File Report 2007-1047-SRP-055, 5 p., https://doi.org/10.3133/ofr20071047SRP055.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":282490,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp055/of2007-1047srp055.pdf"},{"id":282492,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP055.JPG"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 180.0,-90.0 ], [ 180.0,-60.0 ], [ -180.0,-60.0 ], [ -180.0,-90.0 ], [ 180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd4fcae4b0b290850f2ee5","contributors":{"authors":[{"text":"Ghidella, M.E.","contributorId":37645,"corporation":false,"usgs":true,"family":"Ghidella","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":490547,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lawver, L.A.","contributorId":73599,"corporation":false,"usgs":true,"family":"Lawver","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":490548,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gahagan, L.M.","contributorId":15112,"corporation":false,"usgs":true,"family":"Gahagan","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":490546,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70093615,"text":"ofr20071047SRP038 - 2007 - Solubility of TiO<sub>2</sub> in garnet and orthopyroxene: Ti thermometer for ultrahigh-temperature granulites","interactions":[],"lastModifiedDate":"2014-02-10T15:00:23","indexId":"ofr20071047SRP038","displayToPublicDate":"2007-01-01T14:03:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-038","title":"Solubility of TiO<sub>2</sub> in garnet and orthopyroxene: Ti thermometer for ultrahigh-temperature granulites","docAbstract":"We report the TiO<sub>2</sub> solubility in garnet and orthopyroxene coexisting with rutile calibrated from experimental data at pressures 7–20 kbar and temperatures 850–1300°C in two Antarctic granulite systems.The Ti would substitute for the tetrahedral Si, whereas we could not find positive evidence of the coupled substitution of M-Ti (M is Mg or Fe) for Al-Al in octahedral sites as well as the interstitial substitution of \u0003-Ti (\u0003 is avacancy)\nfor M-M in triangular-dodecahedral sites of garnet at ultrahigh-temperature (UHT) metamorphicconditions.The TiO<sub>2</sub> content of garnet increases with temperature and decreases with pressure. In orthopyroxene Ti substitutes for atoms in the tetrahedral and octahedralsites.The Ti content of orthopyroxene increases with temperature and\nincreases with pressure.Titanium solubility in garnet and orthopyroxene is not so sensitive to pressure change as\ncompared with temperature dependence given by following empirical equations: ln (X <sup>Grt;IV</sup><sub>Ti</sub>/X<sup>Grt;IV</sup><sub>Si</sub>)= -15366/T +5.962 and ln ( X<sup>Opx;IV</sup>\n<sub>Ti</sub>/X<sup>Opx;IV</sup><sub>Si</sub>)=-11367=T +3.107 where X is the mole fraction of Ti or Si on the tetrahedral sites and temperature is given in Kelvin.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP038","usgsCitation":"Kawasaki, T., and Motoyoshi, Y., 2007, Solubility of TiO<sub>2</sub> in garnet and orthopyroxene: Ti thermometer for ultrahigh-temperature granulites: U.S. Geological Survey Open-File Report 2007-1047-SRP-038, 4 p., https://doi.org/10.3133/ofr20071047SRP038.","productDescription":"4 p.","costCenters":[],"links":[{"id":282231,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP038.JPG"},{"id":282230,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp038/of2007-1047srp038.pdf"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd7336e4b0b29085108cce","contributors":{"authors":[{"text":"Kawasaki, Toshisuke","contributorId":53289,"corporation":false,"usgs":true,"family":"Kawasaki","given":"Toshisuke","email":"","affiliations":[],"preferred":false,"id":490086,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Motoyoshi, Yoichi","contributorId":83440,"corporation":false,"usgs":true,"family":"Motoyoshi","given":"Yoichi","email":"","affiliations":[],"preferred":false,"id":490087,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70074759,"text":"ofr20071047SRP029 - 2007 - Sea ice concentration temporal variability over the Weddell Sea and its relationship with tropical sea surface temperature","interactions":[],"lastModifiedDate":"2014-02-03T14:09:17","indexId":"ofr20071047SRP029","displayToPublicDate":"2007-01-01T14:01:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-029","title":"Sea ice concentration temporal variability over the Weddell Sea and its relationship with tropical sea surface temperature","docAbstract":"Principal Components Analysis (PCA) in S-Mode (correlation between temporal series) was performed on \nsea ice monthly anomalies, in order to investigate which are the main temporal patterns, where are the homogenous \nareas located and how are they related to the sea surface temperature (SST). This analysis provides 9 patterns (4 in the \nAmundsen and Bellingshausen Seas and 5 in the Weddell Sea) that represent the most important temporal features that \ndominated sea ice concentration anomalies (SICA) variability in the Weddell, Amundsen and Bellingshausen Seas over \nthe 1979-2000 period. Monthly Polar Gridded Sea Ice Concentrations data set derived from satellite information \ngenerated by NASA Team algorithm and acquired from the National Snow and Ice Data Center (NSIDC) were used. \nMonthly means SST are provided by the National Center for Environmental Prediction reanalysis. The first temporal \npattern series obtained by PCA has its homogeneous area located at the external region of the Weddell and \nBellingshausen Seas and Drake Passage, mostly north of 60°S. The second region is centered in 30°W and located at the \nsoutheast of the Weddell. The third area is localized east of 30°W and north of 60°S. South of the first area, the fourth \nPC series has its homogenous region, between 30° and 60°W. The last area is centered at 0° W and south of 60°S. \nCorrelation charts between the five Principal Components series and SST were performed. Positive correlations over the \nTropical Pacific Ocean were found for the five PCs when SST series preceded SICA PC series. The sign of the \ncorrelation could relate the occurrence of an El Niño/Southern Oscillation (ENSO) warm (cold) event with posterior \npositive (negative) anomalies of sea ice concentration over the Weddell Sea.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP029","usgsCitation":"Barreira, S., and Compagnucci, R., 2007, Sea ice concentration temporal variability over the Weddell Sea and its relationship with tropical sea surface temperature: U.S. Geological Survey Open-File Report 2007-1047-SRP-029, 5 p., https://doi.org/10.3133/ofr20071047SRP029.","productDescription":"5 p.","onlineOnly":"N","costCenters":[],"links":[{"id":281910,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP029.JPG"},{"id":281909,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp029/of2007-1047srp029.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 180.0,-90.0 ], [ 180.0,-60.0 ], [ -180.0,-60.0 ], [ -180.0,-90.0 ], [ 180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd7196e4b0b29085107c3f","contributors":{"authors":[{"text":"Barreira, S.","contributorId":28167,"corporation":false,"usgs":true,"family":"Barreira","given":"S.","email":"","affiliations":[],"preferred":false,"id":489837,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Compagnucci, R.","contributorId":21068,"corporation":false,"usgs":true,"family":"Compagnucci","given":"R.","email":"","affiliations":[],"preferred":false,"id":489836,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70100445,"text":"ofr20071047SRP080 - 2007 - Silicified wood from the Permian and Triassic of Antarctica: Tree rings from polar paleolatitudes","interactions":[],"lastModifiedDate":"2014-04-01T14:11:55","indexId":"ofr20071047SRP080","displayToPublicDate":"2007-01-01T14:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-080","title":"Silicified wood from the Permian and Triassic of Antarctica: Tree rings from polar paleolatitudes","docAbstract":"The mass extinction at the Permian-Triassic boundary produced a floral turnover in Gondwana in which \nPaleozoic seed ferns belonging to the Glossopteridales were replaced by corystosperm seed ferns and other seed plant \ngroups in the Mesozoic. Secondary growth (wood production) in both plant groups provides information on plant \ngrowth in relation to environment in the form of permineralized tree rings. Techniques utilized to analyze extant wood \ncan be used on fossil specimens to better understand the climate from both of these periods. Late Permian and early \nMiddle Triassic tree rings from the Beardmore Glacier area indicate an environment where extensive plant growth \noccurred at polar latitudes (~80–85°S, Permian; ~75°S, Triassic). A rapid transition to dormancy in both the Permian \nand Triassic woods suggests a strong influence of the annual light/dark cycle within the Antarctic Circle on ring \nproduction. Latewood production in each ring was most likely triggered by the movement of the already low-angled sun \nbelow the horizon. The plants which produced the wood have been reconstructed as seasonally deciduous, based on \nstructural and sedimentologic evidence. Although the Late Permian climate has been reconstructed as cold temperate \nand the Middle Triassic as a greenhouse, these differences are not reflected in tree ring anatomy or wood production in \nthese plant fossils from the central Transantarctic Mountains.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP080","usgsCitation":"Ryberg, P., and Taylor, E., 2007, Silicified wood from the Permian and Triassic of Antarctica: Tree rings from polar paleolatitudes: U.S. Geological Survey Open-File Report 2007-1047-SRP-080, 5 p., https://doi.org/10.3133/ofr20071047SRP080.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":285233,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP080.JPG"},{"id":285232,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp080/of2007-1047srp080.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53559562e4b0120853e8c1e3","contributors":{"authors":[{"text":"Ryberg, P.E.","contributorId":7188,"corporation":false,"usgs":true,"family":"Ryberg","given":"P.E.","email":"","affiliations":[],"preferred":false,"id":492218,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Taylor, E.L.","contributorId":98219,"corporation":false,"usgs":true,"family":"Taylor","given":"E.L.","email":"","affiliations":[],"preferred":false,"id":492219,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70101089,"text":"ofr20071047SRP095 - 2007 - High resolution stable isotope and carbonate variability during the early Oligocene climate transition: Walvis Ridge (ODP Site 1263)","interactions":[],"lastModifiedDate":"2014-04-28T14:23:46","indexId":"ofr20071047SRP095","displayToPublicDate":"2007-01-01T13:58:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-095","title":"High resolution stable isotope and carbonate variability during the early Oligocene climate transition: Walvis Ridge (ODP Site 1263)","docAbstract":"The rapid global increase in benthic foraminiferal &delta;18O in the early Oligocene (~33.6 Ma) has been taken to imply the first appearance of large, permanent ice sheets on Antarctica, possibly coupled to deep sea cooling and/or Northern Hemisphere ice growth. This oxygen isotope shift is accompanied by a reorganization of the global carbon cycle, identified by a &delta;13C increase that slightly lags the glacially-mediated &delta;18O transition. Here, we present a new\nrecord of the early Oligocene climate transition from the subtropical South Atlantic Ocean. To investigate climatic and carbon cycle variability in the transition from the early Paleogene “greenhouse” into the Oligocene “icehouse” world,\nwe have developed carbonate content, coarse fraction, and benthic foraminiferal carbon and oxygen stable isotope records for the earliest Oligocene at Ocean Drilling Program (ODP) Site 1263. These records represent the highest-\nresolution reconstruction of the Eocene/Oligocene from the Atlantic basin to date, and provide us with a unique opportunity to investigate the fine-scale interplay of glaciation and the global carbon cycle.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP095","usgsCitation":"U.S. Geological Survey, 2007, High resolution stable isotope and carbonate variability during the early Oligocene climate transition: Walvis Ridge (ODP Site 1263): U.S. Geological Survey Open-File Report 2007-1047-SRP-095, 7 p., https://doi.org/10.3133/ofr20071047SRP095.","productDescription":"7 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":286734,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP095.JPG"},{"id":286733,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp095/of2007-1047srp095.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"535f786ee4b078dca33ae375"}
,{"id":70103171,"text":"ofr20071047SRP102 - 2007 - Triassic-Jurassic sediments and multiple volcanic events in North Victoria Land, Antarctica: A revised stratigraphic model","interactions":[],"lastModifiedDate":"2014-04-29T14:11:58","indexId":"ofr20071047SRP102","displayToPublicDate":"2007-01-01T13:55:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-102","title":"Triassic-Jurassic sediments and multiple volcanic events in North Victoria Land, Antarctica: A revised stratigraphic model","docAbstract":"Field investigations in North Victoria Land, Antarctica during GANOVEX IX (2005/2006) allow the \nrevision of the Triassic-Jurassic stratigraphy of ~300 m thick continental deposits in between the crystalline basement \nand the Kirkpatrick lava flows of the Ferrar Group. The lower stratigraphic unit (Section Peak Formation) is \ncharacterised by braided river-type quartzose sandstone deposits with intercalations of shale and coal occurring at the \ntop. It is overlain by a homogeneous unit of reworked tuffs composed of fine-grained silicic shards, quartz and feldspar \n(new name: \"Shafer Peak Formation\"). These deposits can be correlated with parts of the Hanson Formation in the \nCentral Transantarctic Mountains and require a distal yet unknown source of massive silicic volcanism. Clastic products \nof mafic volcanic eruptions, formerly described as a separate stratigraphic formation (Exposure Hill Formation), occur \nwithin local diatreme structures as well as intercalated at various stratigraphic levels within the sedimentary succession. \nThese dominantly hydroclastic eruptions are the first subaerial expression of Ferrar magmatism. The initial Kirkpatrick \nlavas/pillow lavas were generated from local eruptive centres and again may be overlain by thin sediments, which are \ncovered by the thick plateau lava succession known throughout the Transantarctic Mountain Range.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP102","usgsCitation":"Schoner, R., Viereck-Goette, L., Schneider, J., and Bomfleur, B., 2007, Triassic-Jurassic sediments and multiple volcanic events in North Victoria Land, Antarctica: A revised stratigraphic model: U.S. Geological Survey Open-File Report 2007-1047-SRP-102, 5 p., https://doi.org/10.3133/ofr20071047SRP102.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":286777,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP102.JPG"},{"id":286776,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp102/of2007-1047srp102.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5360c9fee4b082a3ecf53e44","contributors":{"authors":[{"text":"Schoner, R.","contributorId":97004,"corporation":false,"usgs":true,"family":"Schoner","given":"R.","email":"","affiliations":[],"preferred":false,"id":493196,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Viereck-Goette, L.","contributorId":37641,"corporation":false,"usgs":true,"family":"Viereck-Goette","given":"L.","email":"","affiliations":[],"preferred":false,"id":493193,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schneider, J.","contributorId":85546,"corporation":false,"usgs":true,"family":"Schneider","given":"J.","email":"","affiliations":[],"preferred":false,"id":493195,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bomfleur, B.","contributorId":54116,"corporation":false,"usgs":true,"family":"Bomfleur","given":"B.","email":"","affiliations":[],"preferred":false,"id":493194,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70068872,"text":"ofr20071047SRP011 - 2007 - SCIAMACHY’s View of the Polar Atmosphere","interactions":[],"lastModifiedDate":"2014-01-13T13:58:25","indexId":"ofr20071047SRP011","displayToPublicDate":"2007-01-01T13:48:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-011","title":"SCIAMACHY’s View of the Polar Atmosphere","docAbstract":"The instrument SCIAMACHY onboard the European ENVISAT mission provides unique capabilities for \nderiving atmospheric geophysical parameters. Since its launch in early 2002 it has operated successfully in orbit. Due to \nENVISAT’s high inclination orbit the polar regions are monitored continuously. We report here results about the status \nof the polar atmosphere in the past 5 years with special emphasis on the southern hemisphere. This part of the \natmosphere is considered to be highly sensitive to anthropogenic impacts on the Earth system and thus to climate \nchange. The acquired data permit retrieving information on the Earth’s atmosphere from troposphere up to the \nmesosphere","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP011","usgsCitation":"Gottwald, M., Krieg, E., von Savigny, C., Noel, S., Reichl, A., Bovensmann, H., and Burrows, J., 2007, SCIAMACHY’s View of the Polar Atmosphere: U.S. Geological Survey Open-File Report 2007-1047-SRP-011, 4 p., https://doi.org/10.3133/ofr20071047SRP011.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":280901,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP011.JPG"},{"id":280900,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp011/of2007-1047srp011.pdf"}],"geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd713ae4b0b290851078a1","contributors":{"authors":[{"text":"Gottwald, M.","contributorId":90637,"corporation":false,"usgs":true,"family":"Gottwald","given":"M.","email":"","affiliations":[],"preferred":false,"id":488164,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Krieg, E.","contributorId":15929,"corporation":false,"usgs":true,"family":"Krieg","given":"E.","email":"","affiliations":[],"preferred":false,"id":488159,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"von Savigny, C.","contributorId":62137,"corporation":false,"usgs":true,"family":"von Savigny","given":"C.","email":"","affiliations":[],"preferred":false,"id":488161,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Noel, S.","contributorId":80582,"corporation":false,"usgs":true,"family":"Noel","given":"S.","email":"","affiliations":[],"preferred":false,"id":488162,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Reichl, A.","contributorId":30139,"corporation":false,"usgs":true,"family":"Reichl","given":"A.","email":"","affiliations":[],"preferred":false,"id":488160,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Bovensmann, H.","contributorId":91015,"corporation":false,"usgs":true,"family":"Bovensmann","given":"H.","email":"","affiliations":[],"preferred":false,"id":488165,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Burrows, J.P.","contributorId":85879,"corporation":false,"usgs":true,"family":"Burrows","given":"J.P.","email":"","affiliations":[],"preferred":false,"id":488163,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70074756,"text":"ofr20071047SRP028 - 2007 - Crustal structure and evolution of the Mawson Sea, western Wilkes Land margin, East Antarctica","interactions":[],"lastModifiedDate":"2014-02-03T13:54:13","indexId":"ofr20071047SRP028","displayToPublicDate":"2007-01-01T13:46:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-028","title":"Crustal structure and evolution of the Mawson Sea, western Wilkes Land margin, East Antarctica","docAbstract":"Thisstudy is based on about 4000 km of MCS, magnetic and gravity data as well as 10 sonobuoys collected\nby the 2005 Russian Antarctic Expedition in the Mawson Sea and adjacent Australian-Antarctic basin between 102°E \nand 115°E. Major identified tectonic provinces and features of the study region include: 1) A marginal rift about 300 km \nwide which developed as a result of extreme crustal extension and unroofing of the upper mantle, and 2) An oceanic \nbasin with the crust of not older than 81 Ma, which is characterized by ultraslow sea-floorspreading ratesranging from\n3 to 11 mm/yr. Three major unconformities are identified in the sedimentary cover of the Mawson Sea and are \ninterpreted to be caused by break-up between Australia and Antarctica at about 81 Ma ago (WL1), the first arrival of the \nice sheet to the Mawson Sea (WL3) and continental scale glaciation at about 34 Ma ago (WL4).","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP028","usgsCitation":"Leitchenkov, G., Gandyukhin, V., Guseva, Y.B., and Kazankov, A.Y., 2007, Crustal structure and evolution of the Mawson Sea, western Wilkes Land margin, East Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-028, 4 p., https://doi.org/10.3133/ofr20071047SRP028.","productDescription":"4 p.","numberOfPages":"4","costCenters":[],"links":[{"id":281904,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP028.JPG"},{"id":281903,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp028/of2007-1047srp028.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 180.0,-90.0 ], [ 180.0,-60.0 ], [ -180.0,-60.0 ], [ -180.0,-90.0 ], [ 180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd5384e4b0b290850f5337","contributors":{"authors":[{"text":"Leitchenkov, G.L.","contributorId":70126,"corporation":false,"usgs":true,"family":"Leitchenkov","given":"G.L.","email":"","affiliations":[],"preferred":false,"id":489825,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gandyukhin, V.V.","contributorId":35081,"corporation":false,"usgs":true,"family":"Gandyukhin","given":"V.V.","email":"","affiliations":[],"preferred":false,"id":489822,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Guseva, Yu. B.","contributorId":67803,"corporation":false,"usgs":true,"family":"Guseva","given":"Yu.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":489824,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kazankov, A. Yu","contributorId":38061,"corporation":false,"usgs":true,"family":"Kazankov","given":"A.","email":"","middleInitial":"Yu","affiliations":[],"preferred":false,"id":489823,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70093609,"text":"ofr20071047SRP037 - 2007 - East Antarctic Ice Sheet fluctuations during the Middle Miocene Climatic  Transition inferred from faunal and biogeochemical data on planktonic  foraminifera (ODP Hole 747A, Kerguelen Plateau)","interactions":[],"lastModifiedDate":"2014-02-10T13:54:59","indexId":"ofr20071047SRP037","displayToPublicDate":"2007-01-01T13:39:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-037","title":"East Antarctic Ice Sheet fluctuations during the Middle Miocene Climatic  Transition inferred from faunal and biogeochemical data on planktonic  foraminifera (ODP Hole 747A, Kerguelen Plateau)","docAbstract":"This research focuses on a detailed study of faunal and biogeochemical changes that occurred at ODP Hole \n747A in the Kerguelen Plateau region of the Southern Ocean during the middle Miocene (14.8-11.8 Ma). Abundance \nfluctuations of several planktonic foraminiferal taxa, stable oxygen isotope and Mg/Ca ratios have been integrated as a \nmulti-proxy approach to reach a better understanding of the growth modality and fluctuations of the East Antarctic Ice \nSheet (EAIS) during this period. A 7°C decrease in Sea Surface Temperature (SST), an abrupt turnover in the planktonic \nforaminiferal assemblage, a 1.5‰ shift towards heavier δ<sup>18</sup>O values (Mi3 event) and a related shift towards heavier \nseawater δ1<sup>18</sup>O values between 13.9 and 13.7 Ma, are interpreted to reflect rapid surface water cooling and EAIS \nexpansion. Hole 747A data suggest a major change in the variability of the climate system fostered by EAIS expansion \nbetween 13.9 and 13.7 Ma. Ice sheet fluctuations were greater during the interval 14.8-13.9 Ma compared with those \nfrom 13.7 to 11.8 Ma, whereas the latter interval was characterized by a more stable EAIS. In our opinion, the middle \nMiocene ice sheet expansion in Antarctica represents a first step towards the development of the modern permanent ice \nsheet","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP037","usgsCitation":"Verducci, M., Foresi, L., Scott, G., Tiepolo, Sprovieri, M., and Lirer, F., 2007, East Antarctic Ice Sheet fluctuations during the Middle Miocene Climatic  Transition inferred from faunal and biogeochemical data on planktonic  foraminifera (ODP Hole 747A, Kerguelen Plateau): U.S. Geological Survey Open-File Report 2007-1047-SRP-037, 5 p., https://doi.org/10.3133/ofr20071047SRP037.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":282223,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP037.JPG"},{"id":282222,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp037/of2007-1047srp037.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 180.0,-90.0 ], [ 180.0,-60.0 ], [ -180.0,-60.0 ], [ -180.0,-90.0 ], [ 180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd563ae4b0b290850f6cb2","contributors":{"authors":[{"text":"Verducci, M.","contributorId":62134,"corporation":false,"usgs":true,"family":"Verducci","given":"M.","email":"","affiliations":[],"preferred":false,"id":490077,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Foresi, L.M.","contributorId":107608,"corporation":false,"usgs":true,"family":"Foresi","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":490078,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Scott, G.H.","contributorId":54509,"corporation":false,"usgs":true,"family":"Scott","given":"G.H.","email":"","affiliations":[],"preferred":false,"id":490076,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Tiepolo","contributorId":128047,"corporation":true,"usgs":false,"organization":"Tiepolo","id":535627,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Sprovieri, M.","contributorId":12775,"corporation":false,"usgs":true,"family":"Sprovieri","given":"M.","email":"","affiliations":[],"preferred":false,"id":490073,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Lirer, F.","contributorId":54108,"corporation":false,"usgs":true,"family":"Lirer","given":"F.","email":"","affiliations":[],"preferred":false,"id":490075,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
]}