期刊
PALEOCEANOGRAPHY
卷 31, 期 6, 页码 779-788出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016PA002945
关键词
Marine S barite record; sulfur cycle; minor S isotopes; Cretaceous; Cenozoic
The last 125Myr capture major changes in the chemical composition of the ocean and associated geochemical and biogeochemical cycling. The sulfur isotopic composition of seawater sulfate, as proxied in marine barite, is one of the more perplexing geochemical records through this interval. Numerous analytical and geochemical modeling approaches have targeted this record. In this study we extend the empirical isotope record of seawater sulfate to therefore include the two minor sulfur isotopes, S-33 and S-36. These data record a distribution of values around means of S-33 and S-36 of 0.043 0.016 and -0.39 0.15, which regardless of S-34-based binning strategy is consistent with a signal population of values throughout this interval. We demonstrate with simple box modeling that substantial changes in pyrite burial and evaporite sulfate weathering can be accommodated within the range of our observed isotopic values.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据