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S.B. Bortnikova1, O.L. Gaskova2, A.A. Tomilenko2, A.L. Makas1, E.A. Fursenko1, N.A. Palchik2, I.V. Danilenko2, N.A. Abrosimova1
1V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
2Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
Keywords: gas-liquid inclusions, interstitial environment, stored waste
Abstract >>
The article presents the results of studies of inclusions in secondary sulfates (antlerite, a mixture of copiapite and coquimbite) and arsenates (erythrite and picropharmacolite) formed on the surface of technogenic bodies - stored waste from the enrichment of sulfide (Belovo and Ursk waste heaps) and arsenide (disposal maps of the Tuvacobalt plant) ores. A wide range of components have been identified in the composition of gas-liquid inclusions (GLI), the main ones being water and carbon dioxide. Hydrocarbons, O-containing organic compounds, N- and S-containing gases were found in smaller but measurable quantities. Arsine H3As was also found in inclusions of picropharmacolite (calcium and magnesium arsenate-arsenite). GLI of secondary minerals are a reflection of the composition of the interstitial environment in the waste body with one or another access of atmospheric gases, entering in free form and with seasonal precipitation into the waste body. The combination of locally generated and permeating gases determines the diversity of inorganic and biotic interactions in technogenic bodies. The presence of hydrocarbons and O-containing organic compounds is most likely associated with bacterial transformations of organic matter (residues of vegetation, wood, microalgae, fungi). At the same time, compounds such as carbon disulfide and sulfur dioxide indicate active inorganic reactions of decomposition of the sulfide matrix.
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