| The author has identified the following significant results. Surface water statistics using data obtained by supporting aircraft were generated. Signature extraction and refinement preliminary to wetland and associated upland vegetation recognition were accomplished, using a selected portion of the aircraft data. Final classification mapping and analysis of surface water trends will be accomplished. |
Comparative elevations referred chiefly to a tidal bench mark with a history of relatively positive movement show that much of the Transverse Ranges of southern California sustained major changes in elevation both before and in association with the ML 6.4 San Fernando earthquake of February 9, 1971. Preseismic changes in elevation in the southern Transverse Ranges were almost uniformly positive and generally episodic. Maximum uplift measured between 1960/61 and 1968/69 was 0.205 m (observed) or 0.200 m (adjusted); it occurred about 30 km northeast of the 1971 epicenter. As much as 0.129 m (observed) of preseismic uplift was also measured about 30 km northwest of the epicenter between 1964 and 1968. A comparison between 1968 and 1969 elevation data revealed 0.078 m (observed) of differential uplift centered about 10 km west of the epicenter; earlier leveling indicates that this uplift began between February 1967 and May 1968. Changes in elevation measured during the interval 1968/69-71 (postearthquake) are interpreted as chiefly coseismic and were concentrated along a 15-km ruptured segment of the east-trending, north-dipping San Fernando fault. These changes were characterized by subsidence of as much as 0.111 m (observed) or 0.092 m (adjusted) south of the fault and a ridge of uplift of up to at least 2.195 m (observed) or 2.196 m (adjusted) immediately north of the fault.
The more episodic preseismic movements are interpretable as deep-seated creep events on the San Fernando fault. Alternatively, these episodic movements may be due partly to the operation of dilatancy; the onset of the 196849 epicentral uplift accords closely with the initiation of a Vp/Vs anomaly recognized in this same area. The 1968/69-71 elevation changes can be attributed almost entirely to slip on the San Fernando fault.
","language":"English","publisher":"Elsevier","doi":"10.1016/0040-1951(75)90138-9","issn":"00401951","usgsCitation":"Castle, R.O., Church, J.P., Elliot, M.R., and Morrison, N.L., 1975, Vertical crustal movements preceding and accompanying the San Fernando earthquake of February 9, 1971: A summary: Tectonophysics, v. 29, no. 1-4, p. 127-140, https://doi.org/10.1016/0040-1951(75)90138-9.","productDescription":"14 p.","startPage":"127","endPage":"140","costCenters":[],"links":[{"id":219504,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -118.66607666015624,\n 34.79576153473033\n ],\n [\n -118.72650146484374,\n 34.807038111521614\n ],\n [\n -118.85833740234375,\n 34.77094763658632\n ],\n [\n -118.97918701171874,\n 34.72129745316466\n ],\n [\n -119.14398193359375,\n 34.63094797335811\n ],\n [\n -119.25933837890624,\n 34.513346401475786\n ],\n [\n -119.31427001953125,\n 34.384246040152185\n ],\n [\n -119.33898925781251,\n 34.29353023058858\n ],\n [\n -119.3115234375,\n 34.252676117101515\n ],\n [\n -119.2840576171875,\n 34.20271636159618\n ],\n [\n -119.22637939453124,\n 34.13226824445654\n ],\n [\n -119.14947509765624,\n 34.07768740409027\n ],\n [\n -119.07806396484375,\n 34.04583232505719\n ],\n [\n -118.99291992187499,\n 34.03672867489511\n ],\n [\n -118.83911132812499,\n 33.97980872872457\n ],\n [\n -118.7841796875,\n 33.99119576995599\n ],\n [\n -118.72650146484374,\n 34.00713506435885\n ],\n [\n -118.58642578124999,\n 34.023071367612125\n ],\n [\n -118.50677490234375,\n 34.0094118622566\n ],\n [\n -118.47930908203124,\n 33.96614226559745\n ],\n [\n -118.42437744140625,\n 33.88865750124075\n ],\n [\n -118.4051513671875,\n 33.827075293445986\n ],\n [\n -118.45458984375,\n 33.779147331286474\n ],\n [\n -118.4271240234375,\n 33.7243396617476\n ],\n [\n -118.30078125,\n 33.701492795584365\n ],\n [\n -118.2513427734375,\n 33.696922692957685\n ],\n [\n -118.17993164062499,\n 33.71977077483141\n ],\n [\n -118.114013671875,\n 33.754031498216385\n ],\n [\n -118.01788330078125,\n 33.865854454071865\n ],\n [\n -117.83935546874999,\n 34.00258128543371\n ],\n [\n -117.80364990234375,\n 34.1890858311724\n ],\n [\n -117.83111572265625,\n 34.37291193073771\n ],\n [\n -117.96844482421875,\n 34.472599425831355\n ],\n [\n -118.11126708984375,\n 34.59251960889388\n ],\n [\n -118.30902099609374,\n 34.66032236481892\n ],\n [\n -118.51776123046875,\n 34.7461262752594\n ],\n [\n -118.66607666015624,\n 34.79576153473033\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"29","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc231e4b08c986b32a9ac","contributors":{"authors":[{"text":"Castle, Robert O.","contributorId":22741,"corporation":false,"usgs":true,"family":"Castle","given":"Robert","email":"","middleInitial":"O.","affiliations":[],"preferred":false,"id":357857,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Church, Jack P.","contributorId":6480,"corporation":false,"usgs":true,"family":"Church","given":"Jack","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":357855,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Elliot, Michael R.","contributorId":189355,"corporation":false,"usgs":true,"family":"Elliot","given":"Michael","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":357856,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Morrison, Nancy L.","contributorId":82055,"corporation":false,"usgs":false,"family":"Morrison","given":"Nancy","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":357858,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70010949,"text":"70010949 - 1975 - Canister cryogenic system for cooling germanium semiconductor detectors in borehole and marine probes","interactions":[],"lastModifiedDate":"2021-02-16T13:33:22.284344","indexId":"70010949","displayToPublicDate":"1975-01-01T00:00:00","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2906,"text":"Nuclear Instruments and Methods","active":true,"publicationSubtype":{"id":10}},"title":"Canister cryogenic system for cooling germanium semiconductor detectors in borehole and marine probes","docAbstract":"High resolution intrinsic and lithium-drifted germanium gamma-ray detectors operate at about 77–90 K. A cryostat for borehole and marine applications has been designed that makes use of prefrozen propane canisters. Uses of such canisters simplifies cryostat construction, and the rapid exchange of canisters greatly reduces the time required to restore the detector to full holding-time capability and enhances the safety of a field operation where high-intensity 252Cf or other isotopic sources are used. A holding time of 6 h at 86 K was achieved in the laboratory in a simulated borehole probe in which a canister 3.7 cm diameter by 57 cm long was used. Longer holding times can be achieved by larger volume canisters in marine probes.
Samples of all eighteen of the known C2 chondrites have been analyzed thermomagnetically. For eleven of these, initial Fe3O4 content is low (generally <1%) and theJs-T curves are irreversible. The heating curves show variable greater (up to 10 times) than it is initially. This behavior is attributed to the production of magnetite from a thermally unstable phase — apparently FeS. Four of the remaining seven C2 chondrites contain Fe3O4 as the only significant magnetic phase: initial magnetite contents range from 4 to 13%. The remaining three C2 chondrites contain iron or nickel-iron in addition to Fe3O4. These seven C2 chondrites show little evidence of the breakdown of a thermally unstable phase.
High alkalinity values found in some formation waters from Kettleman North Dome oil field are due chiefly to acetate and propionate ions, with some contribution from higher molecular weight organic acid ions. Some of these waters contain no detectable bicarbonate alkalinity. For waters such as these, high supersaturation with respect to calcite will be incorrectly indicated by thermodynamic calculations based upon carbonate concentrations inferred from traditional alkalinity measurements
A new method has been discovered for calculating ages of the main shield building stages of volcanoes along the Hawaiian chain from Kilauea to the Hawaiian-Emperor bend. The method is based on a graphical technique for hypothetical subtraction of distance intervals that theoretically represent regions of simultaneous volcanism along adjacent or nearly en-echelon loci of volcanism. Distances along the chain, measured from Kilauea, when progressively foreshortened by the distances of hypothetical “collapse” and plotted versus existing age data are found to give linear age-distance relationships. A calibration graph is presented that agrees closely with the measured ages in 17 of the 20 existing dated volcanoes. The criterion for simultaneous activity on different loci is based on the concept of equal azimuths of synchronous volcanic propagation within coeval segments of the chain. This is the predicted relationship when magmatic fluids inject the lithosphere along directions normal to a nearly horizontal least principal stress. It appears that the Pacific plate has been subjected to oscillatory, but principally clockwise, rotations of horizontal stress components during the last 40 m.y.
No abstract available.
","language":"English","publisher":"American Chemical Society","doi":"10.1021/es60107a001","issn":"0013936X","usgsCitation":"Martell, J., Rickert, D.A., and Siegel, F., 1975, PCB's in Suburban Watershed, Reston, Va: Environmental Science & Technology, v. 9, no. 9, p. 872-875, https://doi.org/10.1021/es60107a001.","productDescription":"4 p.","startPage":"872","endPage":"875","costCenters":[],"links":[{"id":219739,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Virginia","city":"Reston","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -77.40056795260114,\n 38.9430361988814\n ],\n [\n -77.395583952518,\n 38.92203585821528\n ],\n [\n -77.29652695086331,\n 38.90539271207308\n ],\n [\n -77.29091995076968,\n 38.943682264600966\n ],\n [\n -77.31251728446408,\n 38.97436360424581\n ],\n [\n -77.37564795218545,\n 38.97581660129856\n ],\n [\n -77.40056795260114,\n 38.9430361988814\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"9","issue":"9","noUsgsAuthors":false,"publicationDate":"2002-05-01","publicationStatus":"PW","scienceBaseUri":"505a7335e4b0c8380cd76f0f","contributors":{"authors":[{"text":"Martell, J.M.","contributorId":90868,"corporation":false,"usgs":true,"family":"Martell","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":357890,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rickert, D. A.","contributorId":53773,"corporation":false,"usgs":true,"family":"Rickert","given":"D.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":357889,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Siegel, F.R.","contributorId":105430,"corporation":false,"usgs":true,"family":"Siegel","given":"F.R.","email":"","affiliations":[],"preferred":false,"id":357891,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70010948,"text":"70010948 - 1975 - Mercury distribution in ancient and modern sediment of northeastern Bering Sea","interactions":[{"subject":{"id":15187,"text":"ofr72268 - 1972 - Mercury distribution in ancient and modern sediment of northeastern Bering Sea","indexId":"ofr72268","publicationYear":"1972","noYear":false,"title":"Mercury distribution in ancient and modern sediment of northeastern Bering Sea"},"predicate":"SUPERSEDED_BY","object":{"id":70010948,"text":"70010948 - 1975 - Mercury distribution in ancient and modern sediment of northeastern Bering Sea","indexId":"70010948","publicationYear":"1975","noYear":false,"title":"Mercury distribution in ancient and modern sediment of northeastern Bering Sea"},"id":1}],"lastModifiedDate":"2013-01-24T14:24:55","indexId":"70010948","displayToPublicDate":"1975-01-01T00:00:00","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2667,"text":"Marine Geology","active":true,"publicationSubtype":{"id":10}},"title":"Mercury distribution in ancient and modern sediment of northeastern Bering Sea","docAbstract":"Reconnaissance sampling of surface and subsurface sediment to a maximum depth of 80 m below the sea floor shows that typical values of 0.03 p.p.m. and anomalies of 0.2-1.3 p.p.m. mercury have been present in northeastern Bering Sea since Early Pliocene time. Values are highest in modern beach (maximum 1.3 and mean 0.22 p.p.m. Hg) and nearshore subsurface gravels (maximum 0.6 and mean 0.06 p.p.m. Hg) along the highly mineralized Seward Peninsula and in clayey silt rich in organic matter (maximum 0.16 and mean 0.10 p.p.m. Hg) throughout the region. Although gold mining may be partly responsible for high mercury levels in the modern beach near Nome, Alaska (maximum 0.45 p.p.m.), equally high or greater concentrations of mercury occur in buried Pleistocene sediments immediately offshore (maximum 0.6 p.p.m.) and in modern unpolluted beach sediments at Bluff (maximum 1.3 p.p.m.); this suggests that the contamination effects of mining may be no greater than natural concentration processes in the Seward Peninsula region. The mercury content of offshore surface sediment, even adjacent to mercury-rich beaches, corresponds to that of unpolluted marine and fresh-water sediment elsewhere. The normal values that prevail offshore may be attributable to entrapment of mercury-bearing heavy minerals on beaches near sources and/or dilution effects of offshore sedimentation. The few minor anomalies offshore occur in glacial drift derived from mercury source regions of Chukotka (Siberia) and Seward Peninsula; Pleistocene shoreline processes have reworked the drift to concentrate the heavy metals. The distribution pattern of mercury indicates that particulate mercury-bearing minerals have not been widely dispersed from onland deposits in quantities sufficient to increase mercury levels above normal in offshore sediments of Bering Sea; however, it shows that natural sedimentary processes can concentrate this mercury in beaches of the coastal zone where there already is concern because of potential pollution from man's activities.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Marine Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","publisherLocation":"Amsterdam Netherlands","doi":"10.1016/0025-3227(75)90006-7","issn":"00253227","usgsCitation":"Nelson, C., Pierce, D., Leong, K., and Wang, F., 1975, Mercury distribution in ancient and modern sediment of northeastern Bering Sea: Marine Geology, v. 18, no. 3, p. 91-104, https://doi.org/10.1016/0025-3227(75)90006-7.","productDescription":"14 p.","startPage":"91","endPage":"104","costCenters":[{"id":387,"text":"Mineral Resources Program","active":true,"usgs":true}],"links":[{"id":220949,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":266423,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0025-3227(75)90006-7"}],"geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 161.98,51.22 ], [ 161.98,66.05 ], [ -157.0,66.05 ], [ -157.0,51.22 ], [ 161.98,51.22 ] ] ] } } ] }","volume":"18","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5401e4b0c8380cd6ce5c","contributors":{"authors":[{"text":"Nelson, C.H.","contributorId":88346,"corporation":false,"usgs":true,"family":"Nelson","given":"C.H.","email":"","affiliations":[],"preferred":false,"id":359957,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pierce, D.E.","contributorId":88083,"corporation":false,"usgs":true,"family":"Pierce","given":"D.E.","email":"","affiliations":[],"preferred":false,"id":359956,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Leong, Kam","contributorId":103660,"corporation":false,"usgs":true,"family":"Leong","given":"Kam","affiliations":[],"preferred":false,"id":359958,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wang, F.F.H.","contributorId":87219,"corporation":false,"usgs":true,"family":"Wang","given":"F.F.H.","email":"","affiliations":[],"preferred":false,"id":359955,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70010184,"text":"70010184 - 1975 - Sandrewia, n. gen., a problematical plant from the Lower Permian of Texas and Kansas","interactions":[],"lastModifiedDate":"2021-02-16T14:16:59.487707","indexId":"70010184","displayToPublicDate":"1975-01-01T00:00:00","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3275,"text":"Review of Palaeobotany and Palynology","active":true,"publicationSubtype":{"id":10}},"title":"Sandrewia, n. gen., a problematical plant from the Lower Permian of Texas and Kansas","docAbstract":"Sandrewia, n. gen., monotypified by S. texana, n. sp., is a plant from Lower Permian beds of north-central Texas and east-central Kansas. It is characterized by stout axes with spirally disposed, laxly inserted, petiolate leaves; the laminae are broadly flabelliform with coarse, open venation. The leaves are reminiscent of the vojnovskyalean Nephropsis, of the Permian Petchora Basin, U.S.S.R., but biologic relationships are only speculative because of limited material. However, leaf characteristics render Sandrewia easily identifiable. Its presently limited stratigraphic range, along with floristic associations, indicates it may be a useful guide fossil and supports the author's beliefs regarding important times and places in Paleozoic plant evolution.
No abstract available.
","language":"English","publisher":"American Chemical Society","doi":"10.1021/es60102a007","issn":"0013936X","usgsCitation":"Crecelius, E., Bothner, M., and Carpenter, R., 1975, Geochemistries of arsenic, antimony, mercury, and related elements in sediments of Puget Sound: Environmental Science & Technology, v. 9, no. 4, p. 325-333, https://doi.org/10.1021/es60102a007.","productDescription":"9 p.","startPage":"325","endPage":"333","costCenters":[],"links":[{"id":219505,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Washington","otherGeospatial":"Puget Sound","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -123.07439696358247,\n 47.003596038944835\n ],\n [\n -122.70908448410535,\n 47.01803615890864\n ],\n [\n -122.137291037967,\n 47.31678787953186\n ],\n [\n -122.12670227044582,\n 48.10407337433554\n ],\n [\n -122.35965515590982,\n 48.624663211741506\n ],\n [\n -122.65084626273925,\n 48.85510380098347\n ],\n [\n -123.52441958322854,\n 48.62816261939409\n ],\n [\n -123.58795218835505,\n 48.333366121910416\n ],\n [\n -123.17499025503301,\n 48.05101378995616\n ],\n [\n -122.95792052085064,\n 47.82045639930547\n ],\n [\n -123.32323300032812,\n 47.528132152719905\n ],\n [\n -123.07439696358247,\n 47.003596038944835\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"9","issue":"4","noUsgsAuthors":false,"publicationDate":"2002-05-01","publicationStatus":"PW","scienceBaseUri":"505a16cee4b0c8380cd5527b","contributors":{"authors":[{"text":"Crecelius, E.A.","contributorId":50787,"corporation":false,"usgs":true,"family":"Crecelius","given":"E.A.","email":"","affiliations":[],"preferred":false,"id":357859,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bothner, Michael H. mbothner@usgs.gov","contributorId":139855,"corporation":false,"usgs":true,"family":"Bothner","given":"Michael H.","email":"mbothner@usgs.gov","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":357860,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Carpenter, R.","contributorId":94793,"corporation":false,"usgs":true,"family":"Carpenter","given":"R.","affiliations":[],"preferred":false,"id":357861,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70011013,"text":"70011013 - 1975 - Location of the non-tidal current null zone in northern San Francisco Bay","interactions":[],"lastModifiedDate":"2023-10-26T16:38:43.378743","indexId":"70011013","displayToPublicDate":"1975-01-01T00:00:00","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1585,"text":"Estuarine and Coastal Marine Science","active":true,"publicationSubtype":{"id":10}},"title":"Location of the non-tidal current null zone in northern San Francisco Bay","docAbstract":"Variations in Sacramento-San Joaquin River discharge into northern San Francisco Bay causes shifts in location of the bottom density current null zone. At a river flow of 2000 m3/s this null zone is approximately 20 km from the seaward end of the estuary, whereas at a river flow of 100 m3/s it is 80 km from the seaward end; the corresponding distances of salinity penetration are approximately 40 and 90 km from the seaward end. Seaward of the null zone, during low (summer) river discharge conditions, the inward-flowing bottom density current appears typically strong (5–15 cm/s) relative to the outward-flowing river current (river discharge per unit cross-channel area) of <2 cm/s. Landward from this null zone the average river current increases with decreasing cross-channel area. This circulation implies that during the summer water within the null zone has the longest average advective replacement time relative to water seaward or landward of the null zone.
Reunion Island consists of an olivine-basalt shield capped by a series of flows and intrusives ranging from hawaiite through trachyte. Eleven rocks representing the total compositional sequence have been analyzed for U, Th and REE. Eight of the rocks (group 1) have positive-slope, parallel, chondrite-normalized REE fractionation patterns. Using a computer model, the major element compositions of group 1 whole rocks and observed phenocrysts were used to predict the crystallization histories of increasingly residual liquids, and allowed semi-quantitative verification of origin by fractional crystallization of the olivine-basalt parent magma. Results were combined with mineral-liquid distribution coefficient data to predict trace element abundances, and existing data on Cr, Ni, Sr and Ba were also successfully incorporated in the model. The remaining three rocks (group 2) have nonuniform positive-slope REE fractionation patterns not parallel to group 1 patterns. Rare earth fractionation in a syenite is explained by partial melting of a source rich in clinopyroxene and/or hornblende. The other two rocks of group 2 are explained as hybrids resulting from mixing of syenite and magmas of group 1.
","language":"English","publisher":"Elsevier","doi":"10.1016/0016-7037(75)90012-5","issn":"00167037","usgsCitation":"Zielinski, R.A., 1975, Trace element evaluation of a suite of rocks from Reunion Island, Indian Ocean: Geochimica et Cosmochimica Acta, v. 39, no. 5, p. 713-734, https://doi.org/10.1016/0016-7037(75)90012-5.","productDescription":"22 p.","startPage":"713","endPage":"734","numberOfPages":"22","costCenters":[],"links":[{"id":219207,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"39","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb63be4b08c986b326b46","contributors":{"authors":[{"text":"Zielinski, R. A. 0000-0002-4047-5129","orcid":"https://orcid.org/0000-0002-4047-5129","contributorId":106930,"corporation":false,"usgs":true,"family":"Zielinski","given":"R.","email":"","middleInitial":"A.","affiliations":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":357809,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70010131,"text":"70010131 - 1975 - Uranium determination in natural water by the fissiontrack technique","interactions":[],"lastModifiedDate":"2021-02-17T14:11:33.890976","indexId":"70010131","displayToPublicDate":"1975-01-01T00:00:00","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2302,"text":"Journal of Geochemical Exploration","active":true,"publicationSubtype":{"id":10}},"title":"Uranium determination in natural water by the fissiontrack technique","docAbstract":"The fission track technique, utilizing the neutron-induced fission of uranium-235, provides a versatile analytical method for the routine analysis of uranium in liquid samples of natural water. A detector is immersed in the sample and both are irradiated. The fission track density observed in the detector is directly proportional to the uranium concentration. The specific advantages of this technique are: (1) only a small quantity of sample, typically 0.1–1 ml, is needed; (2) no sample concentration is necessary; (3) it is capable of providing analyses with a lower reporting limit of 1 μg per liter; and (4) the actual time spent on an analysis can be only a few minutes. This paper discusses and describes the method.
Amphibolites associated with alpine peridotites in the Central Ophiolite zone in Yugoslavia have K-Ar ages of 160–170 m.y. These amphibolites and associated peridotites underwent deep-seated metamorphism prior to tectonic emplacement into the sedimentary-volcanic assemblage of the Dinarides. The alpine peridotites and associated local rocks of the ophiolite suite are interpreted as Jurassic oceanic crust and upper mantle.