{"pageNumber":"176","pageRowStart":"4375","pageSize":"25","recordCount":37001,"records":[{"id":70100321,"text":"ofr20071047SRP079 - 2007 - Analysis of the dinoflagellate cyst genus Impletosphaeridium as a marker of sea- ice conditions off Seymour Island: An ecomorphological approach","interactions":[],"lastModifiedDate":"2014-03-31T16:30:06","indexId":"ofr20071047SRP079","displayToPublicDate":"2007-01-01T16:03:00","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-079","title":"Analysis of the dinoflagellate cyst genus Impletosphaeridium as a marker of sea- ice conditions off Seymour Island: An ecomorphological approach","docAbstract":"A unique reworked palynological assemblage composed of 32 to 100% (average of 63%) in\nImpletosphaeridium spp., was found during the study of sixteen samples recovered from piston cores taken off Seymour Island, Antarctica, during a pre-SHALDRIL study. One of the common Impletosphaeridium species recovered, I.\nlorum, was previously found in Seymour Island’s La Meseta Formation. Two questions we asked are: “What is the age\nof this high abundance of Impletosphaeridium spp., providing that they come from a unique source?”, and second “What is the environmental significance of such a high relative abundance?” The samples are likely to have been derived from sediments ranging from Eocene to Miocene in age, as this is the range for most of the Impletosphaeridium\nspecies. The environmental significance of this high abundance is a difficult question, not only because the genus is extinct, but also because these species are poorly known. To try to understand the ecological significance, we used the hypothesis that the morphology of a dinocyst is linked to environmental sea-surface parameters, and looked at extant species with a similar morphology. The extant dinoflagellate cysts of Echinidinium spp, Islandinium cezare, Islandinium minutum, and Pentapharsodinium dalei were selected for their morphological similarity with Impletosphaeridium. Modern ecological parameters for the extant species listed above were derived from the DinoDatabase (940 modern sea-surface samples from around the world). The database showed that these species are all\nindicators of sea-ice cover, with a minimum of 8 months for Echinidinium spp., ~ 5 months for Islandinium cezare, and\nfrom 1 to 12 months for Pentapharsodinium dalei and Islandinium minutum. If our morphologic-similarity hypothesis is correct, and if this high abundance is indeed indicative of a paleo-environmental condition, then it is most likely to have been associated with ephemeral sea-ice development off Seymour Island, sometime between the Eocene and the\nMiocene.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. 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,{"id":70103198,"text":"ofr20071047SRP106 - 2007 - Records of past ice sheet fluctuations in interior East Antarctica","interactions":[],"lastModifiedDate":"2014-04-29T16:01:17","indexId":"ofr20071047SRP106","displayToPublicDate":"2007-01-01T15:44:00","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-106","title":"Records of past ice sheet fluctuations in interior East Antarctica","docAbstract":"The results of a land-based multi-disciplinary study of the past ice surface elevation in the Grove Mountains \nof interior East Antarctica support a dynamic evolution of the East Antarctic Ice Sheet (EAIS). Moraine boulders of \nsedimentary rocks and spore pollen assemblage imply a significant shrinkage of the EAIS, with its margin retreating \nsouth of the Grove Mountains (~450 km south of recent coast line) before the middle Pliocene. The exposure ages \nindicate that the ice sheet subsequently re-advanced, with the ice surface rising locally at least 450 m higher than today. \nIt then went back down constantly from before 2.3 Ma to 1.6 Ma. The glacial topography and existence of soil show \nthat the ice surface fluctuation continued since the early Quaternary, but with highest levels never exceeding ~100 m \nhigher than today.","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/ofr20071047SRP106","usgsCitation":"Liu, X., Huang, F., Kong, P., Fang, A., and Li, X., 2007, Records of past ice sheet fluctuations in interior East Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-106, 4 p., https://doi.org/10.3133/ofr20071047SRP106.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":286790,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP106.JPG"},{"id":286789,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp106/of2007-1047srp106.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":"5360c9f2e4b082a3ecf53e28","contributors":{"authors":[{"text":"Liu, Xiaohan","contributorId":100747,"corporation":false,"usgs":true,"family":"Liu","given":"Xiaohan","email":"","affiliations":[],"preferred":false,"id":493217,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Huang, Feixin","contributorId":60541,"corporation":false,"usgs":true,"family":"Huang","given":"Feixin","email":"","affiliations":[],"preferred":false,"id":493214,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kong, Ping","contributorId":88269,"corporation":false,"usgs":true,"family":"Kong","given":"Ping","email":"","affiliations":[],"preferred":false,"id":493215,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fang, Aimin","contributorId":97006,"corporation":false,"usgs":true,"family":"Fang","given":"Aimin","email":"","affiliations":[],"preferred":false,"id":493216,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Li, Xiaoli","contributorId":54513,"corporation":false,"usgs":true,"family":"Li","given":"Xiaoli","email":"","affiliations":[],"preferred":false,"id":493213,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70094214,"text":"ofr20071047SRP059 - 2007 - The Ross Orogen and Lachlan Fold Belt in Marie Byrd Land, Northern Victoria Land and New Zealand: implication for the tectonic setting of the Lachlan Fold Belt in Antarctica","interactions":[],"lastModifiedDate":"2014-02-18T15:56:40","indexId":"ofr20071047SRP059","displayToPublicDate":"2007-01-01T15:41:00","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-059","title":"The Ross Orogen and Lachlan Fold Belt in Marie Byrd Land, Northern Victoria Land and New Zealand: implication for the tectonic setting of the Lachlan Fold Belt in Antarctica","docAbstract":"Correlation of the Cambrian Delamerian Orogen of Australia and Ross Orogen of the Transantarctic \nMountains widely accepted but the extension of the adjacent Lachlan Orogen into Antarctica is controversial. Outside \nthe main Ross-Delamerian belt, evidence of this orogeny is preserved at Mt Murphy in Marie Byrd Land and the in \nTakaka Terrane of New Zealand. In all pre-break- configurations of the SW Pacific, these two areas are far removed \nfrom the Ross-Delamerian belt. Evidence from conglomerates in the Takaka Terrane, however, shows that in Late \nCambrian times it was adjacent to the Ross Orogen. This indicates major tectonic displacements within Gondwana after \nthe Cambrian and before break-up. The Lachlan Orogen formed in an extensional belt in a supra-subduction zone \nsetting and the Cambrian rocks of Marie Byrd Land and New Zealand are interpreted as parts of a rifted continental \nribbon on the outboard side of the Lachlan belt.","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/ofr20071047SRP059","usgsCitation":"Bradshaw, J., 2007, The Ross Orogen and Lachlan Fold Belt in Marie Byrd Land, Northern Victoria Land and New Zealand: implication for the tectonic setting of the Lachlan Fold Belt in Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-059, 4 p., https://doi.org/10.3133/ofr20071047SRP059.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":282509,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp059/of2007-1047srp059.pdf"},{"id":282510,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP059.JPG"}],"otherGeospatial":"Antarctica;Marie Byrd Land","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -157.59,-83.89 ], [ -157.59,-74.63 ], [ -98.20,-74.63 ], [ -98.20,-83.89 ], [ -157.59,-83.89 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd7731e4b0b2908510b67d","contributors":{"authors":[{"text":"Bradshaw, J.D.","contributorId":48324,"corporation":false,"usgs":true,"family":"Bradshaw","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":490567,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70093627,"text":"ofr20071047SRP040 - 2007 - Mega debris flow deposits on the western Wilkes Land margin, East Antarctica","interactions":[],"lastModifiedDate":"2014-02-10T16:00:22","indexId":"ofr20071047SRP040","displayToPublicDate":"2007-01-01T15:41:00","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-040","title":"Mega debris flow deposits on the western Wilkes Land margin, East Antarctica","docAbstract":"Multichannel seismic data collected off Western Wilkes Land (East Antarctica) reveal the occurrence of mega \ndebris flow deposits on the lower slope and rise that were formed throughout the Miocene. Commonly, debris flow units \nare separated by thin deposits of well-stratified facies, interpreted as predominantly glaciomarine mixed contouritic and \ndistal turbidite deposits. These units could act as weak layers and could have played a major role in the slope instability. \nHigh sedimentation rates, due to large amounts of sediment delivered from a temperate, wet-based ice sheet, constituted \na key factor in the sediment failures. The main trigger mechanism would probably have been earthquakes enhanced by \nisostatic rebound following major ice sheet retreats.","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/ofr20071047SRP040","usgsCitation":"Donda, F., O’Brien, P.E., De Santis, L., Rebesco, M., and Brancolini, G., 2007, Mega debris flow deposits on the western Wilkes Land margin, East Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-040, 4 p., https://doi.org/10.3133/ofr20071047SRP040.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":282235,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP040.JPG"},{"id":282234,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp040/of2007-1047srp040.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":"53cd6683e4b0b29085100ce2","contributors":{"authors":[{"text":"Donda, F.","contributorId":40792,"corporation":false,"usgs":true,"family":"Donda","given":"F.","email":"","affiliations":[],"preferred":false,"id":490096,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"O’Brien, P. E.","contributorId":91271,"corporation":false,"usgs":false,"family":"O’Brien","given":"P.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":490098,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"De Santis, L.","contributorId":96471,"corporation":false,"usgs":true,"family":"De Santis","given":"L.","email":"","affiliations":[],"preferred":false,"id":490099,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rebesco, M.","contributorId":60120,"corporation":false,"usgs":true,"family":"Rebesco","given":"M.","affiliations":[],"preferred":false,"id":490097,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Brancolini, Giuliano","contributorId":29150,"corporation":false,"usgs":false,"family":"Brancolini","given":"Giuliano","email":"","affiliations":[],"preferred":false,"id":490095,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70069189,"text":"ofr20071047SRP017 - 2007 - Cenozoic Antarctic DiatomWare/BugCam: An aid for research and teaching","interactions":[],"lastModifiedDate":"2014-01-13T15:40:53","indexId":"ofr20071047SRP017","displayToPublicDate":"2007-01-01T15:28:00","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-017","title":"Cenozoic Antarctic DiatomWare/BugCam: An aid for research and teaching","docAbstract":"Cenozoic Antarctic DiatomWare/BugCam© is an interactive, icon-driven digital-image \ndatabase/software package that displays over 500 illustrated Cenozoic Antarctic diatom taxa along with original \ndescriptions (including over 100 generic and 20 family-group descriptions). This digital catalog is designed primarily \nfor use by micropaleontologists working in the field (at sea or on the Antarctic continent) where hard-copy literature \nresources are limited. This new package will also be useful for classroom/lab teaching as well as for any \npaleontologists making or refining taxonomic identifications at the microscope. The database (Cenozoic Antarctic \nDiatomWare) is displayed via a custom software program (BugCam) written in Visual Basic for use on PCs running \nWindows 95 or later operating systems. BugCam is a flexible image display program that utilizes an intuitive \nthumbnail “tree” structure for navigation through the database. The data are stored on Micrsosoft EXCEL spread \nsheets, hence no separate relational database program is necessary to run the package","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. 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,{"id":70059615,"text":"ofr20071047KP06 - 2007 - A view of Antarctic ice-sheet evolution from sea-level and deep-sea Isotope Changes During the Late Cretaceous-Cenozoic","interactions":[],"lastModifiedDate":"2013-12-23T15:54:37","indexId":"ofr20071047KP06","displayToPublicDate":"2007-01-01T15:25:00","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-KP-06","title":"A view of Antarctic ice-sheet evolution from sea-level and deep-sea Isotope Changes During the Late Cretaceous-Cenozoic","docAbstract":"The imperfect direct record of Antarctic glaciation has led \nto the delayed recognition of the initiation of a continentsized ice sheet. Early studies interpreted initiation in the \nmiddle Miocene (ca 15 Ma). Most current studies place the \nfirst ice sheet in the earliest Oligocene (33.55 Ma), but there \nis physical evidence for glaciation in the Eocene. Though \nthere are inherent limitations in sea-level and deep-sea isotope records, both place constraints on the size and extent \nof Late Cretaceous to Cenozoic Antarctic ice sheets. Sealevel records argue that small- to medium-size (typically \n10-12 × 10<sup>6</sup>\n km3\n) ephemeral ice sheets occurred during the \ngreenhouse world of the Late Cretaceous to middle Eocene. \nDeep-sea δ <sup>18</sup>O records show increases associated with \nmany of these greenhouse sea-level falls, consistent with \ntheir attribution to ice-sheet growth. Global cooling began \nin the middle Eocene and culminated with the major earliest Oligocene (33.55 Ma) growth of a large (25 × 10<sup>6</sup>\n km<sup>3</sup>\n) \nAntarctic ice sheet that caused a 55-70 m eustatic fall and \na 1‰ δ\n<sup>18</sup>O increase. This large ice sheet became a driver of \nclimate change, not just a response to it, causing increased \nlatitudinal thermal gradients and a spinning up of the oceans \nthat, in turn, caused a dramatic reorganization of ocean circulation and chemistry.","language":"English","publisher":"National Academies Press","publisherLocation":"Washington, DC","doi":"10.3133/ofr20071047KP06","usgsCitation":"Miller, K., Wright, J., Katz, M., Browning, J., Cramer, B., Wade, B., and Mizintseva, S., 2007, A view of Antarctic ice-sheet evolution from sea-level and deep-sea Isotope Changes During the Late Cretaceous-Cenozoic: U.S. Geological Survey Open-File Report 2007-1047-KP-06, 16 p., https://doi.org/10.3133/ofr20071047KP06.","productDescription":"16 p.","startPage":"55","endPage":"70","numberOfPages":"16","costCenters":[],"links":[{"id":280527,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.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":"53cd4acae4b0b290850effda","contributors":{"authors":[{"text":"Miller, K.G.","contributorId":18094,"corporation":false,"usgs":true,"family":"Miller","given":"K.G.","email":"","affiliations":[],"preferred":false,"id":487734,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wright, J.D.","contributorId":34676,"corporation":false,"usgs":true,"family":"Wright","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":487737,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Katz, M.E.","contributorId":13776,"corporation":false,"usgs":true,"family":"Katz","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":487733,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Browning, J.V.","contributorId":18889,"corporation":false,"usgs":true,"family":"Browning","given":"J.V.","email":"","affiliations":[],"preferred":false,"id":487735,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Cramer, B.S.","contributorId":32020,"corporation":false,"usgs":true,"family":"Cramer","given":"B.S.","email":"","affiliations":[],"preferred":false,"id":487736,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Wade, B.S.","contributorId":34742,"corporation":false,"usgs":true,"family":"Wade","given":"B.S.","email":"","affiliations":[],"preferred":false,"id":487738,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Mizintseva, S.F.","contributorId":63299,"corporation":false,"usgs":true,"family":"Mizintseva","given":"S.F.","email":"","affiliations":[],"preferred":false,"id":487739,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70101002,"text":"ofr20071047SRP091 - 2007 - Aeromagnetic anomaly patterns reveal buried faults along the eastern margin of  the Wilkes Subglacial Basin (East Antarctica)","interactions":[],"lastModifiedDate":"2014-04-08T15:58:51","indexId":"ofr20071047SRP091","displayToPublicDate":"2007-01-01T15:23:00","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-091","title":"Aeromagnetic anomaly patterns reveal buried faults along the eastern margin of  the Wilkes Subglacial Basin (East Antarctica)","docAbstract":"The Wilkes Subglacial Basin (WSB) is the major morphological feature recognized in the hinterland of the \nTransantarctic Mountains. The origin of this basin remains contentious and relatively poorly understood due to the lack \nof extensive geophysical exploration. We present a new aeromagnetic anomaly map over the transition between the \nTransantarctic Mountains and the WSB for an area adjacent to northern Victoria Land. The aeromagnetic map reveals \nthe existence of subglacial faults along the eastern margin of the WSB. These inferred faults connect previously \nproposed fault zones over Oates Land with those mapped along the Ross Sea Coast. Specifically, we suggest a link \nbetween the Matusevich Frature Zone and the Priestley Fault during the Cenozoic. The new evidence for structural \ncontrol on the eastern margin of the WSB implies that a purely flexural origin for the basin is unlikely.","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/ofr20071047SRP091","usgsCitation":"Armadillo, E., Ferraccioli, F., Zunino, A., and Bozzo, E., 2007, Aeromagnetic anomaly patterns reveal buried faults along the eastern margin of  the Wilkes Subglacial Basin (East Antarctica): U.S. Geological Survey Open-File Report 2007-1047-SRP-091, 4 p., https://doi.org/10.3133/ofr20071047SRP091.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":285909,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP091.PNG"},{"id":285907,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp091/of2007-1047srp091.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":"53558fc4e4b0120853e8be25","contributors":{"authors":[{"text":"Armadillo, E.","contributorId":32083,"corporation":false,"usgs":true,"family":"Armadillo","given":"E.","email":"","affiliations":[],"preferred":false,"id":492512,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ferraccioli, Fausto","contributorId":43591,"corporation":false,"usgs":true,"family":"Ferraccioli","given":"Fausto","email":"","affiliations":[],"preferred":false,"id":492514,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zunino, A.","contributorId":36046,"corporation":false,"usgs":true,"family":"Zunino","given":"A.","email":"","affiliations":[],"preferred":false,"id":492513,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bozzo, E.","contributorId":46001,"corporation":false,"usgs":true,"family":"Bozzo","given":"E.","email":"","affiliations":[],"preferred":false,"id":492515,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70100462,"text":"ofr20071047SRP084 - 2007 - Differences in ice retreat across Pine Island Bay, West Antarctica, since the Last Glacial Maximum: Indications from multichannel seismic reflection data","interactions":[],"lastModifiedDate":"2014-04-01T15:45:20","indexId":"ofr20071047SRP084","displayToPublicDate":"2007-01-01T15:19:00","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-084","title":"Differences in ice retreat across Pine Island Bay, West Antarctica, since the Last Glacial Maximum: Indications from multichannel seismic reflection data","docAbstract":"An understanding of the glacial history of Pine Island Bay (PIB) is essential for refining models of the future \nstability of the West Antarctic Ice Sheet (WAIS). New multichannel seismic reflection data from inner PIB are \ninterpreted in context of previously published reconstructions for the retreat history in this area since the Last Glacial \nMaximum. Differences in the behavior of the ice sheet during deglaciation are shown to exist for the western and \neastern parts of PIB. While we can identify only a thin veneer of sedimentary deposits in western PIB, eastern PIB \nshows sedimentary layers ≤ 400 msTWT. This is interpreted as a result of differences in ice retreat: a fast ice retreat in \nwestern PIB accompanied by rapid basal melting led to production of large meltwater streams, a slower ice retreat in \neastern PIB is most probably the result of smaller drainage basins resulting in less meltwater production.","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/ofr20071047SRP084","usgsCitation":"Uenzelmann-Neben, G., Gohl, K., Larter, R., and Schluter, P., 2007, Differences in ice retreat across Pine Island Bay, West Antarctica, since the Last Glacial Maximum: Indications from multichannel seismic reflection data: U.S. Geological Survey Open-File Report 2007-1047-SRP-084, Report: 4 p.; Plate 1: 11.69 inches x 8.27 inches; Plate 2: 16.54 inches x 11.69 inches, https://doi.org/10.3133/ofr20071047SRP084.","productDescription":"Report: 4 p.; Plate 1: 11.69 inches x 8.27 inches; Plate 2: 16.54 inches x 11.69 inches","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":285265,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP084.JPG"},{"id":285261,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp084/of2007-1047srp084_plate1.pdf"},{"id":285262,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp084/of2007-1047srp084_plate2.pdf"},{"id":285263,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp084/of2007-1047srp084.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":"53559003e4b0120853e8bebe","contributors":{"authors":[{"text":"Uenzelmann-Neben, G.","contributorId":22682,"corporation":false,"usgs":true,"family":"Uenzelmann-Neben","given":"G.","email":"","affiliations":[],"preferred":false,"id":492233,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gohl, K.","contributorId":53285,"corporation":false,"usgs":true,"family":"Gohl","given":"K.","email":"","affiliations":[],"preferred":false,"id":492234,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Larter, R.D.","contributorId":8765,"corporation":false,"usgs":true,"family":"Larter","given":"R.D.","email":"","affiliations":[],"preferred":false,"id":492232,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Schluter, P.","contributorId":102384,"corporation":false,"usgs":true,"family":"Schluter","given":"P.","email":"","affiliations":[],"preferred":false,"id":492235,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70093622,"text":"ofr20071047SRP039 - 2007 - Early Precambrian mantle derived rocks in the southern Prince Charles Mountains, East Antarctica: age and isotopic constraints","interactions":[],"lastModifiedDate":"2014-02-10T15:30:49","indexId":"ofr20071047SRP039","displayToPublicDate":"2007-01-01T15:17:00","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-039","title":"Early Precambrian mantle derived rocks in the southern Prince Charles Mountains, East Antarctica: age and isotopic constraints","docAbstract":"Mafic and ultramafic rocks occurring as lenses, boudins, and tectonic slabs within metamorphic units in the \nsouthern Mawson Escarpment display mantle characteristics of either a highly enriched, or highly depleted nature. \nFractionation of these mantle rocks from their sources may be as old as Eoarchaean (ca 3850 Ma) while their tectonic \nemplacement probably occurred prior to 2550 Ma (U-Pb SHRIMP data). These results provide for the first time \nevidence for Archaean suturing within East Antarctica. Similar upper mantle sources are likely present in the northern \nMawson Escarpment. A younger age limit of these rocks is 2200 Ma, as indicated by presumably metamorphic zircon \nages while their magmatic age may be constrained by single zircon dates at 2450-2250 Ma. The area of the northern \nMawson Escarpment is most likely of ensimatic origin and includes mafic rocks which were derived from distinct \nmantle source(s) during Palaeoproterozoic time.","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/ofr20071047SRP039","usgsCitation":"Mikhalsky, E., Henjes-Kunst, F., and Roland, N., 2007, Early Precambrian mantle derived rocks in the southern Prince Charles Mountains, East Antarctica: age and isotopic constraints: U.S. Geological Survey Open-File Report 2007-1047-SRP-039, 4 p., https://doi.org/10.3133/ofr20071047SRP039.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":282233,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP039.JPG"},{"id":282232,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp039/of2007-1047srp039.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":"53cd5602e4b0b290850f6ab1","contributors":{"authors":[{"text":"Mikhalsky, E.V.","contributorId":44831,"corporation":false,"usgs":true,"family":"Mikhalsky","given":"E.V.","email":"","affiliations":[],"preferred":false,"id":490092,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Henjes-Kunst, F.","contributorId":106409,"corporation":false,"usgs":true,"family":"Henjes-Kunst","given":"F.","email":"","affiliations":[],"preferred":false,"id":490094,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Roland, N.W.","contributorId":60535,"corporation":false,"usgs":true,"family":"Roland","given":"N.W.","email":"","affiliations":[],"preferred":false,"id":490093,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70074776,"text":"ofr20071047SRP033 - 2007 - Jurassic magmatism in Dronning Maud Land: synthesis of results of the MAMOG project","interactions":[],"lastModifiedDate":"2014-02-03T15:34:48","indexId":"ofr20071047SRP033","displayToPublicDate":"2007-01-01T15:13:00","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-033","title":"Jurassic magmatism in Dronning Maud Land: synthesis of results of the MAMOG project","docAbstract":"The Jurassic Karoo large igneous province (LIP) of Antarctica, and its conjugate margin in southern Africa, \nis critical for investigating important questions about the relationship of basaltic LIPs to mantle plumes. Detailed \naerogeophysical, structural, anisotropy of magnetic susceptibility (AMS), geochronological and geochemical \ninvestigations completed under the British Antarctic Survey’s MAMOG project have provided some of the answers. \nAcross most of the area, magma volumes were small compared to those in southern Africa. Jurassic dikes intruding the \nArchean craton are sparse and the Jutulstraumen trough, a Jurassic rift, is interpreted, from aerogeophysical data, as \nlargely amagmatic. The largest volumes of magma were emplaced along the margin of the craton and close to the \nAfrica-Antarctica rift. Although dikes were emplaced by both vertical and horizontal flow, overwhelmingly magmas in \nDronning Maud Land were locally derived, and not emplaced laterally from distant sources. Basaltic magmatism was \nprotracted in Dronning Maud Land (several dike emplacement episodes between ~206 and 175 Ma), and the small \nmagma volumes resulted in highly diverse magma compositions, including picrites and ferropicrites interpreted to have \nbeen derived from hot mantle in a mantle plume. The protracted magmatism before the locally ~177 Ma flood lava \neruptions, and evidence for a radiating dike swarm, favor a model of mantle plume incubation for 20-30 million years \nbefore flood lava eruption.","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/ofr20071047SRP033","usgsCitation":"Leat, P., Curtis, M., Riley, T., and Ferraccioli, F., 2007, Jurassic magmatism in Dronning Maud Land: synthesis of results of the MAMOG project: U.S. Geological Survey Open-File Report 2007-1047-SRP-033, 4 p., https://doi.org/10.3133/ofr20071047SRP033.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":281930,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP033.JPG"},{"id":281926,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp033/of2007-1047srp033.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":"53cd6364e4b0b290850fec3f","contributors":{"authors":[{"text":"Leat, P.T.","contributorId":54511,"corporation":false,"usgs":true,"family":"Leat","given":"P.T.","email":"","affiliations":[],"preferred":false,"id":489864,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Curtis, M.L.","contributorId":55335,"corporation":false,"usgs":true,"family":"Curtis","given":"M.L.","email":"","affiliations":[],"preferred":false,"id":489865,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Riley, T.R.","contributorId":107609,"corporation":false,"usgs":true,"family":"Riley","given":"T.R.","email":"","affiliations":[],"preferred":false,"id":489866,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ferraccioli, Fausto","contributorId":43591,"corporation":false,"usgs":true,"family":"Ferraccioli","given":"Fausto","email":"","affiliations":[],"preferred":false,"id":489863,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70069027,"text":"ofr20071047SRP016 - 2007 - Magnetic anomalies northeast of Cape Adare, northern Victoria Land (Antarctica), and their relation to onshore structures","interactions":[],"lastModifiedDate":"2014-01-13T15:23:00","indexId":"ofr20071047SRP016","displayToPublicDate":"2007-01-01T15:10:00","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-016","title":"Magnetic anomalies northeast of Cape Adare, northern Victoria Land (Antarctica), and their relation to onshore structures","docAbstract":"An aeromagnetic survey was flown over the offshore region northeast of Cape Adare and the magnetic \nanomalies compared to onshore structures between Pennell Coast and Tucker Glacier. The magnetic anomalies show \ntwo nearly orthogonal major trends. NNW-SSE trending anomalies northeast of Cape Adare represent seafloor \nspreading within the Adare Trough. A connection of these anomalies to the Northern Basin of the Ross Sea is not clear. \nOnshore faults are closely aligned to offshore anomalies. Main trends are NW-SE to NNW-SSE and NE-SW to NNESSW. NNW-SSE oriented dextral-transtensional to extensional faults parallel the Adare Peninsula and Adare Trough \nanomalies. NE-SW trending normal faults appear to segment the main Hallett volcanic bodies.","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/ofr20071047SRP016","usgsCitation":"Damaske, D., Laufer, A., Goldmann, F., Moller, H., and Lisker, F., 2007, Magnetic anomalies northeast of Cape Adare, northern Victoria Land (Antarctica), and their relation to onshore structures: U.S. Geological Survey Open-File Report 2007-1047-SRP-016, 5 p., https://doi.org/10.3133/ofr20071047SRP016.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":280920,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP016.JPG"},{"id":280919,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp016/of2007-1047srp016.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":"53cd6547e4b0b290850fffbc","contributors":{"authors":[{"text":"Damaske, D.","contributorId":66771,"corporation":false,"usgs":true,"family":"Damaske","given":"D.","affiliations":[],"preferred":false,"id":488207,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Laufer, A.L.","contributorId":56552,"corporation":false,"usgs":true,"family":"Laufer","given":"A.L.","email":"","affiliations":[],"preferred":false,"id":488205,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Goldmann, F.","contributorId":41092,"corporation":false,"usgs":true,"family":"Goldmann","given":"F.","email":"","affiliations":[],"preferred":false,"id":488204,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Moller, H.-D.","contributorId":92165,"corporation":false,"usgs":true,"family":"Moller","given":"H.-D.","email":"","affiliations":[],"preferred":false,"id":488208,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Lisker, F.","contributorId":57363,"corporation":false,"usgs":true,"family":"Lisker","given":"F.","email":"","affiliations":[],"preferred":false,"id":488206,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70103194,"text":"ofr20071047SRP105 - 2007 - Denudation and uplift of the Mawson Escarpment (eastern Lambert Graben, Antarctica) as indicated by apatite fission track data and geomorphological observation","interactions":[],"lastModifiedDate":"2014-04-29T15:30:07","indexId":"ofr20071047SRP105","displayToPublicDate":"2007-01-01T15:08:00","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-105","title":"Denudation and uplift of the Mawson Escarpment (eastern Lambert Graben, Antarctica) as indicated by apatite fission track data and geomorphological observation","docAbstract":"Analysis of three vertical profiles from the southern Mawson Escarpment (Lambert Graben) reveals apatite fission track (AFT) ages ranging from 102±20 to 287±23 Ma and mean lengths of 12.2 to 13.0 μm. Quantitative thermal histories derived from these data consistently indicate onset of slow cooling below 110°C began sometime prior to 300 Ma, and a second stage of rapid cooling from paleotemperatures up to ≤100°C to surface temperatures occurred in the Late Cretaceous – Paleocene. The first cooling phase refers to Carboniferous – Jurassic basement denudation up to 5 km associated with the initial rifting of the Lambert Graben. The presence of the ancient East Antarctic Erosion Surface and rapid Late Cretaceous – Paleocene cooling indicate a second denudational episode during which up to 4.5 km of sedimentary cover rocks were removed, and that is likely linked to the Cretaceous Gondwana breakup between Antarctica and India and subsequent passive continental margin formation.","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/ofr20071047SRP105","usgsCitation":"Lisker, F., Gibson, H., Wilson, C.J., and Laufer, A., 2007, Denudation and uplift of the Mawson Escarpment (eastern Lambert Graben, Antarctica) as indicated by apatite fission track data and geomorphological observation: U.S. Geological Survey Open-File Report 2007-1047-SRP-105, 6 p., https://doi.org/10.3133/ofr20071047SRP105.","productDescription":"6 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":286787,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP105.JPG"},{"id":286786,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp105/of2007-1047srp105.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":"5360c9e9e4b082a3ecf53df5","contributors":{"authors":[{"text":"Lisker, F.","contributorId":57363,"corporation":false,"usgs":true,"family":"Lisker","given":"F.","email":"","affiliations":[],"preferred":false,"id":493210,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gibson, H.","contributorId":99045,"corporation":false,"usgs":true,"family":"Gibson","given":"H.","email":"","affiliations":[],"preferred":false,"id":493212,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wilson, C. J.","contributorId":88242,"corporation":false,"usgs":true,"family":"Wilson","given":"C.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":493211,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Laufer, A.","contributorId":37257,"corporation":false,"usgs":true,"family":"Laufer","given":"A.","email":"","affiliations":[],"preferred":false,"id":493209,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"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}]}}
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