Mo isotopes in the Lower Cambrian formation of southern China and its implications on paleo-ocean environment

Over the past decade, as one of nontraditional stable isotopes, Mo isotope has developed rapidly and now become an important geochemical proxy to trace paleo-oceanic and atmospheric evolution through geological history. In this paper, Early Cambrian formations in southern China are investigated. The...

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Bibliographic Details
Published in:Chinese science bulletin 2009-12, Vol.54 (24), p.4756-4762
Main Authors: Wen, HanJie, Zhang, YuXu, Fan, HaiFeng, Hu, RuiZhong
Format: Article
Language:English
Subjects:
Brief Communication/Geochemistry
Chemistry/Food Science
Earth Sciences
Engineering
Humanities and Social Sciences
Life Sciences
multidisciplinary
Physics
Science
Science (multidisciplinary)
下寒武统
中国南部
同位素组成
氧化还原条件
海洋环境
稳定同位素
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Summary:Over the past decade, as one of nontraditional stable isotopes, Mo isotope has developed rapidly and now become an important geochemical proxy to trace paleo-oceanic and atmospheric evolution through geological history. In this paper, Early Cambrian formations in southern China are investigated. The results indicate that δ 97/95Mo values of Early Cambrian seawater may have been larger than 1.4‰, values that are close to those of the modern ocean. It was also found that the variations in Mo isotope composition in samples from two sections （Huangjiawan and Gezhongwu in Guizhou） were closely related to changes in redox conditions during sedimentary processes. Combining our results with existing data, a preliminary model for the evolution of seawater Mo isotope composition through geological history was provided. It indicated that Mo isotopic variations were generally consistent with the evolution of atmospheric oxygen.
ISSN:1001-6538
2095-9273
1861-9541
2095-9281
DOI:10.1007/s11434-009-0446-2