Redox Environment and Its Significance for Phosphorus Formation of Ediacaran Doushantuo Formation in Zhangcunping Area, Yichang, Hubei Province: Constraints From Trace Elements

ZENGXiong-Wei; WANGZhi-Hong

doi:10.3969/j.issn.2097-0013.2022.03.014

2022 Vol. 38, No. 3

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ZENGXiong-Wei, WANGZhi-Hong. 2022. Redox Environment and Its Significance for Phosphorus Formation of Ediacaran Doushantuo Formation in Zhangcunping Area, Yichang, Hubei Province: Constraints From Trace Elements. South China Geology, 38(3): 533-541. doi: 10.3969/j.issn.2097-0013.2022.03.014

Citation:

ZENGXiong-Wei, WANGZhi-Hong. 2022. Redox Environment and Its Significance for Phosphorus Formation of Ediacaran Doushantuo Formation in Zhangcunping Area, Yichang, Hubei Province: Constraints From Trace Elements. South China Geology, 38(3): 533-541. doi: 10.3969/j.issn.2097-0013.2022.03.014

Redox Environment and Its Significance for Phosphorus Formation of Ediacaran Doushantuo Formation in Zhangcunping Area, Yichang, Hubei Province: Constraints From Trace Elements

ZENGXiong-Wei¹,
WANGZhi-Hong¹

1. Hubei Key Laboratory of Paleontology and Geological Environment Evolution, Wuhan 430205, Hubei, China
2. Wuhan Center of China Geological Survey (Central South China Innovation Center for Geosciences, Wuhan 430205, Hubei, China

Received Date: 22 July 2021

Revised Date: 11 September 2021

Abstract

Abstract

The major and trace elements of the samples from the second member of Ediacaran Doushantuo Formation from the Wanjiagou section in the Zhangcunping area of western Hubei (South China) have been analyzed, so to constrain redox conditions of the Ediacaran ocean. The enrichment factor of redox-sensitive elements and U/Th ratio values show an obvious evolutionary trend, indicating that the seawater has experienced at least three obvious oxygen reduction processes during the sedimentary stage of the second member of Doushantuo Formation, and corresponding to the significant increase of phosphorus content, which leads to the deposited phosphorus bands, the phosphorite and the siliceous nodular dolostone respectively. The Lower Phosphorite Layer in the Zhangcunping area was deposited in the environment of rapid change from oxidation to reduction. This study shows that the redox state of seawater is one of the key factors influencing the Ediacaran phosphate-forming event.
- trace element /
- redox /
- Ediacaran /
- Doushantuo Formation /
- phosphorite /
- Yichang /
- Zhangcunping

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References

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