Magnetic susceptibility variations of the Ediacaran cap carbonates in the Yangtze platform and their implications for paleoclimate

Wu Huaichun; Zhang Shihong; Jiang Ganqing; Li Haiyan

doi:10.1007/BF02847151

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Magnetic susceptibility variations of the Ediacaran cap carbonates in the Yangtze platform and their implications for paleoclimate

OriginalPaper | Updated：2023-05-16

- Magnetic susceptibility variations of the Ediacaran cap carbonates in the Yangtze platform and their implications for paleoclimate
- Magnetic susceptibility variations of the Ediacaran cap carbonates in the Yangtze platform and their implications for paleoclimate
- 海洋湖沼学报（英文） 2005年23卷第3期页码：291-298
- Affiliations：
  
  1. State key Laboratory of Geological Processes and Mineral Resources China University of Geosciences
  2. Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education China University of Geosciences
  3. Department of Geoscience University of Nevada
- Author bio：
- Funds：
  
  This work was supported by the National Natural Science Foundation (Grant No.40032010B).
- DOI：10.1007/BF02847151
  中图分类号：
- 纸质出版：2005
- Accepted：
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Magnetic susceptibility variations of the Ediacaran cap carbonates in the Yangtze platform and their implications for paleoclimate[J]. 海洋湖沼学报（英文）, 2005,23(3):291-298.

Huaichun, W., Shihong, Z., Ganqing, J. et al. Magnetic susceptibility variations of the Ediacaran cap carbonates in the Yangtze platform and their implications for paleoclimate., Chin. J. Ocean. Limnol. 23, 291–298 (2005). https://doi.org/10.1007/BF02847151
Magnetic susceptibility variations of the Ediacaran cap carbonates in the Yangtze platform and their implications for paleoclimate[J]. 海洋湖沼学报（英文）, 2005,23(3):291-298. DOI： 10.1007/BF02847151.

Huaichun, W., Shihong, Z., Ganqing, J. et al. Magnetic susceptibility variations of the Ediacaran cap carbonates in the Yangtze platform and their implications for paleoclimate., Chin. J. Ocean. Limnol. 23, 291–298 (2005). https://doi.org/10.1007/BF02847151 DOI：

摘要

Abstract

Magnetic susceptibility (MS) data were obtained from 11 sections of the Doushantuo (Ediacaran) cap carbonate that directly overlies the Nantuo glacial diamictite in the southeastern margin of the Yangtze platform. The MS data revealed two regionally correlatable peaks at the bottom and top of the cap carbonate

separated by an interval of low values. The lower MS peak coincides with high percentage of insoluble siliciclastic residues that are compositionally identical to the matrix of the underlying diamictite

suggesting its origin controlled mainly by detrital components during the first phase of cap carbonate deposition at the end of the glaciation. The upper MS peak is associated with high clay content and iron sulfides

and can be interpreted as either derived from enhanced greenhouse weathering that could have brought more terrigenous components into the ocean

or the result of ocean anoxia at the late stage of cap carbonate deposition that could led to formation of abundant iron sulfides. The regionally consistent MS curves from the cap carbonates provided the first geophysical record for the rapid climate change from icehouse to greenhouse conditions in the aftermath of the Neoproterozoic “snowball Earth” event.

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references

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