Доклады Академии наукДоклады Академии наук0869-5652The Russian Academy of Sciences1344110.31857/S0869-56524862228-232Research ArticleBiogenic dissolution of quartz in laterite bauxites (by results of electron-microscopic study)SlukinA. D.boeva@igem.ruBoevaN. M.boeva@igem.ruZhegalloE. A.boeva@igem.ruBortnikovN. S.<p>Academician of the Russian Academy of Sciences</p>boeva@igem.ruInstitute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of SciencesPaleontological Institute of the Russian Academy of Sciences2705201948622282321506201915062019Copyright © 2019, Russian academy of sciences2019<p>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)<sub>3</sub>. 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.)</p>laterite bauxitebiogenic quartz dissolutiongrowth figuresscanning electron microscopyлатеритные бокситыбиогенное растворение кварцафигуры ростасканирующая электронная микроскопия[Schellmann W. Home - an Introduction in Laterite. 2014. http://www.laterite.de/index.html][Ивашов П. В. Биогеохимия внутрипочвенного выветривания. М.: Наука, 1993. 380 с.][Brady P.V., Walther J. V. // Chem. Geol. 1990. № 82. P. 253-264.][Bortnikov N.С., Bugelskiy Yu.Yu., Slukin А. D., Novikov V. М., Piloian G. О. // Geol. Ore Deposits. 2011. № 53. P. 435-446.][Слукин А.Д., Бортников Н. С., Жухлистов А. П. и др. // Новые данные о минералах. 2015. № 50. С. 50-61.][Бактериальная палеонтология / Под ред. А. Ю. Розанова. М.: ПИН РАН, 2002. 188 с.][Pye K., Mazzullo J. // J. Sedimentary Res. Sect. A: Sedimentary, Petrol. and Processes. 1994. V. A64. P. 500-507.][Bennett P.C., Molcer M.E., Siegel D.I., Hassett J.P. // Geochim. Cosmochim. Acta. 1988. V. 52. P. 1521-1530.][Dunning J. D., Petrovski D., Schuyler J., Owens A. // J. Geophys. Res. 1984. V. 89. P. 4115-4123.][Слукин А. Д., Бортников Н. С., Жегалло Е. А. и др. // ДАН. 2014. Т. 458. № 5. С. 572-577.][Slukin A. D., Bortnikov N. S., Zhegallo E. A., et al. In: Biogenic-Abiogenic Interactions in Natural and Anthropogenic Systems. Lecture Notes in Earth System Sciences. Switzerland: Springer, 2016. P. 67-74.][Раков Л. Т., Щипцов В. В., Дубинчук В. Т., Скамницкая Л. С. // Тр. Карел. науч. центра РАН. 2015. № 7. С. 164-180.][Козлова О. Г. Рост и морфология кристаллов. М.: Изд-во МГУ, 1980. 368 с.][Winkler E. M. //Canad. J. Earth Sci. 1980. V. 17. № 7. Р. 956-957.][Anbeek Ch., Breemen N. van., Meijer E. L., Plas L. van der. //Geochim. Cosmochim. Acta. 1994. V. 58. P. 4601-4613.]