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Experimental study of silicon isotope dynamic fractionation and its application in geology

Experimental study of silicon isotope dynamic fractionation and its application in geology Silicon shows no variation in its chemical valence in nature and exists mainly in the form of silicon-oxygen tetrahedra, so very small silicon isotope thermodynamic fractionation occurs and the resultant silicon isotope variation is limited. Dynamic fractionation of Si isotopes during precipitation of SiO 2 from a solution is a main factor leading to substantial variations in silicon isotopes in nature. In this experimental study, we determined the dynamic fractionation factor α for silicon isotopes during precipitation of SiO 2 from the solution. And in combination of α, a theoretical explanation is presented of the considerably low δ 30 Si values of black smokers on modern seafloor, Archean banded magnetite-quartzite and clay minerals of weathering origin, and of clearly high δ 30 Si values of siliceous rocks in shallow-sea carbonate platforms. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Chinese Journal of Geochemistry Springer Journals

Experimental study of silicon isotope dynamic fractionation and its application in geology

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References (3)

Publisher
Springer Journals
Copyright
Copyright © 1995 by Institute of Geochemistry, Chinese Academy of Sciences
Subject
Geosciences; Geochemistry
ISSN
1000-9426
eISSN
1993-0364
DOI
10.1007/BF02842044
Publisher site
See Article on Publisher Site

Abstract

Silicon shows no variation in its chemical valence in nature and exists mainly in the form of silicon-oxygen tetrahedra, so very small silicon isotope thermodynamic fractionation occurs and the resultant silicon isotope variation is limited. Dynamic fractionation of Si isotopes during precipitation of SiO 2 from a solution is a main factor leading to substantial variations in silicon isotopes in nature. In this experimental study, we determined the dynamic fractionation factor α for silicon isotopes during precipitation of SiO 2 from the solution. And in combination of α, a theoretical explanation is presented of the considerably low δ 30 Si values of black smokers on modern seafloor, Archean banded magnetite-quartzite and clay minerals of weathering origin, and of clearly high δ 30 Si values of siliceous rocks in shallow-sea carbonate platforms.

Journal

Chinese Journal of GeochemistrySpringer Journals

Published: Jul 1, 1995

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