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Nacritic Clay Associated with the Jiangshan-Shaoxing Deep Fault in Zhejiang Province, China

Published online by Cambridge University Press:  28 February 2024

Z. Y. Shen ,
M. J. Wilson ,
A. R. Fraser  and
M. J. Pearson
Z. Y. Shen
Affiliation:
Department of Earth Sciences, Zhejiang University, Hangzhou, China
M. J. Wilson
Affiliation:
Division of Soils, Macaulay Land Use Research Institute, Aberdeen, UK
A. R. Fraser
Affiliation:
Division of Soils, Macaulay Land Use Research Institute, Aberdeen, UK
M. J. Pearson
Affiliation:
Department of Geology and Petroleum Geology, University of Aberdeen, Aberdeen, UK
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Abstract

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A kaolin clay occurring in Carboniferous mudstone near the Jiangshan-Shaoxing deep fault in Zhejiang Province, eastern China was characterized by XRD and IR. Although the dominant mineral appeared to be kaolinite, IR also suggested the possible occurrence of nacrite. This was confirmed by forming intercalation complexes with potassium acetate and with hydrazine hydrate, both water complexes having the same characteristic spacing at 8.35 Â. Different particle size fractions of the kaolin clay were studied and the results indicated that nacrite content increased with increasing particle size. This occurrence of nacrite is consistent with previous findings of the polytype in high temperature and pressure environments.

Keywords

Jiangshan-Shaoxing faultKaolinNacritic clay
Type
Research Article
Information
Clays and Clay Minerals , Volume 42 , Issue 5 , October 1994 , pp. 576 - 581
Copyright
Copyright © 1994, Clay Minerals Society

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