Biogenic dissolution of quartz in laterite bauxites (by results of electron-microscopic study)

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Abstract

For the first time carried out a systematic study under an electron microscope forms of a complete weathering of quartz in lateritic bauxites on khondalite and alluvial deposits of India. Demonstrated the appearance of dissolving individuals composing the quartz crystals, and their permanent connection with the abundant biomineral films, turned into a druses crystals of gibbsite - Al(OH)3. The solubility of quartz is due to its unique piezoelectric properties, abnormal expansion in inversion, the characteristics of the climate and the intense impact of the biochemical factor (organic residues, bacteria, biofilms, etc.)

About the authors

A. D. Slukin

Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences

Email: boeva@igem.ru
Russian Federation, 35, Staromonetny, Moscow, 119017

N. M. Boeva

Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences

Author for correspondence.
Email: boeva@igem.ru
Russian Federation, 35, Staromonetny, Moscow, 119017

E. A. Zhegallo

Paleontological Institute of the Russian Academy of Sciences

Email: boeva@igem.ru
Russian Federation, 123, Profsoyuznaya street, Moscow, GSP-7, 117997

N. S. Bortnikov

Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences

Email: boeva@igem.ru

Academician of the Russian Academy of Sciences

Russian Federation, 35, Staromonetny, Moscow, 119017

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