MINERALOGY OF PYROMETAMORPHIC ROCKS ASSOCIATED WITH NATURALLY BURNED COAL-BEARING SPOIL-HEAPS OF THE CHELYABINSK COAL BASIN, RUSSIA
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dc.contributor.author | Sokol E. | |
dc.contributor.author | Volkova N. | |
dc.contributor.author | Lepezin G. | |
dc.date.accessioned | 2020-12-31T03:40:57Z | |
dc.date.available | 2020-12-31T03:40:57Z | |
dc.date.issued | 1998 | |
dc.identifier | https://elibrary.ru/item.asp?id=13286020 | |
dc.identifier.citation | European Journal of Mineralogy, 1998, , 5, 1003-1014 | |
dc.identifier.issn | 0935-1221 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/21796 | |
dc.description.abstract | Pyrometamorphic rocks generated during spontaneous burning of spoil-heaps in the Chelyabinsk coal basin, South Urals, contain a variety of high-temperature minerals, some with diverse and unusual compositons. Optical microscopy, X-ray diffraction, X-ray fluorescence, and microprobe analyses were performed to study the mineralogy of annealed and fused waste rocks. A wide spectrum of rare minerals was found, including tridymite, crystobalite, mullite, K-bearing cordierite, K-Mg-osumilite, and Fe3+,Al-rich Ca-clinopyroxene, as well as hexagonal and orthorhombic analogues of anorthite. It is suggested that the mineralogy of pyrometamorphic rocks is mainly governed by bulk chemical composition, annealing temperature, and oxygen fugacity; moreover, varying degrees of disequilibrium melting, mixing, crystallization, volatilization and a variety of reaction mechanisms influence the formation, structure and chemistry of the constituent minerals. | |
dc.title | MINERALOGY OF PYROMETAMORPHIC ROCKS ASSOCIATED WITH NATURALLY BURNED COAL-BEARING SPOIL-HEAPS OF THE CHELYABINSK COAL BASIN, RUSSIA | |
dc.type | Статья |
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