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- W2000778293 abstract "The Os concentration and isotopic composition of metalliferous carbonates deposited on the East Pacific Rise over the past 28 Ma are reported with complimentary Sr isotope data. Variations in the Os isotopic composition of these samples are interpreted as a record of past changes in the Os isotopic composition of seawater. These results are consistent with isotopic analyses of leachable Os in pelagic clays which have also been interpreted as a record of the187Os/186Os ratio of seawater through time [1]. The metalliferous carbonate record clearly shows that seawater Os and Sr isotope systems are partially decoupled from one another over the past 28 Ma. Accelerated weathering of ancient organic-rich sediments is suggested as a possible mechanism to account for this decoupling and the rapid increase in the187Os/186Os ratio of seawater over the past 15 Ma. This rapid increase suggests that the seawater Os record can potentially be used as a stratigraphic tool in some Neogene marine deposits." @default.
- W2000778293 created "2016-06-24" @default.
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- W2000778293 date "1993-07-01" @default.
- W2000778293 modified "2023-10-05" @default.
- W2000778293 title "Variations of the187Os/186Os ratio of seawater over the past 28 million years as inferred from metalliferous carbonates" @default.
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- W2000778293 doi "https://doi.org/10.1016/0012-821x(93)90177-b" @default.
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