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Clays and Clay Minerals

, Volume 42, Issue 5, pp 576–581 | Cite as

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

  • Z. Y. Shen
  • M. J. Wilson
  • A. R. Fraser
  • M. J. Pearson
Article

Abstract

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.

Key Words

Jiangshan-Shaoxing fault Kaolin Nacritic clay 

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Copyright information

© The Clay Minerals Society 1994

Authors and Affiliations

  • Z. Y. Shen
    • 1
  • M. J. Wilson
    • 2
  • A. R. Fraser
    • 2
  • M. J. Pearson
    • 3
  1. 1.Department of Earth SciencesZhejiang UniversityHangzhouChina
  2. 2.Division of SoilsMacaulay Land Use Research InstituteAberdeenUK
  3. 3.Department of Geology and Petroleum GeologyUniversity of AberdeenAberdeenUK

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