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

Updated：2023-05-16

- Magnetic susceptibility variations of the Ediacaran cap carbonates in the Yangtze platform and their implications for paleoclimate
- Journal of Oceanology and Limnology Vol. 23, Issue 3, Pages: 291-298(2005)
- 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：
- DOI：10.1007/BF02847151
  CLC：
- Published：2005
- Accepted：
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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：

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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