The osmium isotopic composition of the continental crust

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doi: 10.1016/0016-7037(93)90296-9
Authors:Esser, Bradley K.; Turekian, Karl K.
Author Affiliations:Primary:
Yale University, Department of Geology and Geophysics, New Haven, CT, United States
Volume Title:Geochimica et Cosmochimica Acta
Source:Geochimica et Cosmochimica Acta, 57(13), p.3093-3104. Publisher: Pergamon, Oxford, International. ISSN: 0016-7037
Publication Date:1993
Note:In English. 90 refs.; illus. incl. 3 tables, sketch map
Summary:Os isotopic compositions are presented of deltaic and continental shelf sediments from the Amazon, Changjiang and Mississippi rivers and for two loess samples from the upper Mississippi valley. Surface sediment from the Changjiang estuary and others which are polluted have high Os concentrations and less radiogenic isotopic compositions than unpolluted samples. N American loess and Mississippi delta sediment Os isotopic compositions are the same; 187Os/186Os = 10-11 is a good average for the current erosion of the upper continental crust. A non-riverine source of Os to sea-water is indicated. [R.K.H.]
Subjects:Continental crust; Crust; Deltaic sedimentation; Isotope ratios; Isotopes; Mantle; Marine environment; Metals; Os-187/Os-186; Osmium; Platinum group; Radioactive isotopes; Sedimentation; Shelf environment; Stable isotopes; Re-187/Os-186
Abstract Numbers:94M/773
Record ID:1994018792
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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