Tracking the redox history and nitrogen cycle in the pelagic Panthalassic deep ocean in the Middle Triassic to Early Jurassic: Insights from redox-sensitive elements and nitrogen isotopes
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- 作者：Wataru Fujisakia ; fujisaki.w.aa@m.titech.ac.jp" class="auth_mail" title="E-mail the corresponding author ; Yusuke Sawakia ; Shinji Yamamotob ; Tomohiko Satoc ; Manabu Nishizawad ; Brian F. Windleye ; Shigenori Maruyamac
- 关键词：Mass extinction ; Oceanic anoxic event ; Sediment geochemistry ; Shales ; Japan
- 刊名：Palaeogeography, Palaeoclimatology, Palaeoecology
- 出版年：2016
- 出版时间：1 May 2016
- 年：2016
- 卷：449
- 期：Complete
- 页码：397-420
- 全文大小：6294 K
文摘
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We made a detailed geological map at Katsuyama using high resolution aerial photos.
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Distinct high Ce and Mn contents across the Tr–J boundary indicate an oxic condition.
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Enrichments of Mo and U in Anisian and Toarcian black shales support deep-sea euxinia.
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δ15NTN in Anisian black shales may attribute to a prominent ammonium assimilation.
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δ15NTN values in Toarcian black shales indicate an enhance nitrogen fixation.