Silicon isotope compositions of euhedral authigenic quartz crystals: Implications for abiotic fractionation at surface temperatures
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- 作者：Xinyang Chen ; xinyangchen87@gmail.com" class="auth_mail" title="E-mail the corresponding author ; Henry S. Chafetz ; Rasmus Andreasen1 ; Thomas J. Lapen
- 关键词：Euhedral megaquartz ; Silicon isotope ; Fractionation factor
- 刊名：Chemical Geology
- 出版年：2016
- 出版时间：20 March 2016
- 年：2016
- 卷：423
- 期：Complete
- 页码：61-73
- 全文大小：3173 K
文摘
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δ30Si values of megaquartz crystals in the Cretaceous Edwards Formation were measured by bulk and in situ techniques.
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A two-stage Rayleigh-type fractionation model was proposed to explain the quartz formation and observed Si isotope range.
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Si isotope abiotic fractionation factor at surface temperature was constrained.
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Early Cretaceous seawater Si isotopic composition was estimated.