A possible link between the seawater osmium isotope record and weathering of ancient sedimentary organic matter

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doi: 10.1016/0009-2541(93)90186-M
Author(s): Ravizza, G.; Esser, B. K.
Author Affiliation(s): Primary:
Woods Hole Oceanographic Institution, Department of Geology and Geophysics, Woods Hole, MA, United States
Other:
Lawrence Livermore National Laboratory, Livermore, CA, United States
Volume Title: Geochemistry of the Earth surface; abstracts for the third international symposium on the Geochemistry of the Earth surface
Volume Author(s): Kump, Lee R., editor
Source: Chemical Geology, 107(3-4), p.255-258; Third international symposium on the Geochemistry of the Earth surface, University Park, PA, Aug. 1-6, 1993, edited by Lee R. Kump. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0009-2541 CODEN: CHGEAD
Note: In English. 11 refs.; illus.
Summary: The Os isotopic composition of leachable Os from a North Pacific pelagic clay sequence and bulk sediment samples of metalliferous limestones deposited near the EPR display similar patterns of temporal variation, reflecting the 187Os/186Os compositional changes in sea-water. In the Re-Os system, the geochemistry of Re plays a fundamental role in coupling the geochemical cycles of Os and organic matter; the primary sink for Re in the oceans is burial in association with organic-rich sediments, accounting for approx 50% of present-day riverine Re flux.
Year of Publication: 1993
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 02 Geochemistry; C-13/C-12; Carbon; Clastic sediments; Clay; DSDP Site 525; Deep Sea Drilling Project; East Pacific; East Pacific Rise; IPOD; Isotopes; Leg 74; Metals; North Pacific; Organic carbon; Organic compounds; Organic materials; Os-187/Os-186; Osmium; Pacific Ocean; Patterns; Platinum group; Radioactive isotopes; Sea water; Sediments; Stable isotopes; Time variations; Weathering
Coordinates: S290415 S290414 E0025908 E0025907
Record ID: 1993033561
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from CAPCAS, Elsevier Scientific Publishers