Re-Os depositional age for black shales from the Kaimur Group, Upper Vindhyan, India
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- 作者：Gyana Ranjan Tripathya ; b ; grtripathy@gmail.com" class="auth_mail" title="E-mail the corresponding author ; grtripathy@iiserpune.ac.in" class="auth_mail" title="E-mail the corresponding author ; Sunil Kumar Singha
- 关键词：Upper Vindhyan ; Kaimur Group ; Re&ndash ; Os geochronology ; Black shales ; Mesoproterozoic
- 刊名：Chemical Geology
- 出版年：2015
- 出版时间：15 October 2015
- 年：2015
- 卷：413
- 期：Complete
- 页码：63-72
- 全文大小：1526 K
文摘
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Re–Os age of the Bijaigarh shale, Kaimur Group is 1210 ± 52 Ma.
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This age for the Kaimur Group is ~ 400 Ma younger than the underlying Semri Group.
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Paleo-hydrology controls the initial 187Os/188Os of shales from a restricted basin.
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187Os/188Os ratios of marine shale show coarse synchrony with atmospheric O2 level.