Some aspects of geochemistry of pyrophyllite and diaspore deposits of Bundelkhand complex

  • Rajendra P. Sharma


Pyrophyllite and diaspore contain significantly enriched amounts of loss mobile elements like Ti and Cr by a factor of about 3 and Zr by a factor of about 2 as compared to Bundelkhand rocks and granites. This pattern suggests a bauxiticlaterite type of origin for pyrophyllite and diaspore occurrences in the Bundelkhand complex. This feature is comparable with the laterites of Kot area in western India. Phase boundaries of kaolinite and diaspore as a function of pH, pSi, and pA1 suggest that these minerals have formed in a very low dissolved Si (1 ppm) environment. Incongruent and congruent dissolution of kaolinite seem to be responsible for depletion of Si and A1 during lateritisation. This fact is supported by the balance calculations carried out with Ti as an index element.


Pyrophyllite diaspore titanium chromium zirconium laterite geochemistry 


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Copyright information

© Indian Academy of Sciences 1980

Authors and Affiliations

  • Rajendra P. Sharma
    • 1
  1. 1.Department of GeologyLucknow UniversityLucknow

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