Gradual changes in upwelled seawater conditions (redox, pH) from the late Cretaceous through early Paleogene at the northwest coast of Africa: Negative Ce anomaly trend recorded in fossil bio-apatite
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- 作者：Lá ; szlό Kocsisa ; b ; laszlokocsis@hotmail.com" class="auth_mail" title="E-mail the corresponding author ; Emmanuel Gheerbrantc ; Mustapha Mouflihd ; Henri Cappettae ; Alex Ulianova ; Massimo Chiaradiaf ; Nathalie Bardetc
- 关键词：Morocco ; Atlantic ; Tethys ; Rare earth elements ; Ce anomaly ; Phosphorite ; Paleoceanography ; Shark teeth
- 刊名：Chemical Geology
- 出版年：2016
- 出版时间：10 February 2016
- 年：2016
- 卷：421
- 期：Complete
- 页码：44-54
- 全文大小：1639 K
文摘
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We investigated Maastrichtian–Eocene phosphorite deposits in Morocco.
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Archive dependent REE contents are observed in bioapatite fossils.
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The main REE source in the fossils is associated with seawater.
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Age-related Ce/Ce* drops indicate redox and/or pH changes of upwelled seawater.
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Link to extended oceanic circulation is proposed here.