Desilication in Archean weathering processes traced by silicon isotopes and Ge/Si ratios
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- 作者：Camille Delvignea ; b ; camille.delvigne@africamuseum.be" class="auth_mail" title="E-mail the corresponding author ; Sophie Opfergeltc ; Damien Cardinala ; 1 ; Axel Hofmannd ; Luc André ; a
- 关键词：Archean ; Paleosol ; Paleoweathering ; Pongola Supergroup ; Silicon isotopes ; Germanium ; Ge/Si
- 刊名：Chemical Geology
- 出版年：2016
- 出版时间：20 January 2016
- 年：2016
- 卷：420
- 期：Complete
- 页码：139-147
- 全文大小：940 K
文摘
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δ30Si and Ge/Si paleosol fingerprints were controlled by desilication.
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The leaching of Fe also exerts a control onto δ30Si and Ge/Si signatures.
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δ30Si signature of soil solution is estimated about + 0.1‰.
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Ge/Si ratio of soil solution is estimated about 1.4 μmol/mol.
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δ30Si and Ge/Si paleosol fingerprints are concordant with an oxidative weathering step.
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δ30Si and Ge/Si shale signatures provide insights into desilication degree of the source area.