FAYALITE AND KIRSCHSTEINITE SOLID SOLUTIONS IN MELTS FROM BURNED SPOIL-HEAPS, SOUTH URALS, RUSSIA
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dc.contributor.author | Sokol E. | |
dc.contributor.author | Sharygin V. | |
dc.contributor.author | Kalugin V. | |
dc.contributor.author | Volkova N. | |
dc.contributor.author | Nigmatulina E. | |
dc.date.accessioned | 2021-09-23T04:09:47Z | |
dc.date.available | 2021-09-23T04:09:47Z | |
dc.date.issued | 2002 | |
dc.identifier | https://elibrary.ru/item.asp?id=13415290 | |
dc.identifier.citation | European Journal of Mineralogy, 2002, 14, 4, 795-807 | |
dc.identifier.issn | 0935-1221 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/30522 | |
dc.description.abstract | Individual grains of calcian fayalite and ferroan kirschsteinite, as well as fayalite-kirschsteinite intergrowths are observed in the groundinass of basic crystallised melts, or parabasalts, from burned spoil-heaps of the Chelyabinsk brown-coal basin. Exsolved fayalite and kirschsteinite rims surround the grains of fayalite and early Mg-Fe olivine. The chemical study of the olivines has shown that during their crystallisation they were becoming enriched in fayalite and larnite and depleted in forstetite. The intergrowths of ferroan kirschsteinite (> 20 wt.% of CaO) and calcian fayalite (< 8.5 wt.% of CaO) are the exsolution products of an initially homogeneous Ca-Fe olivine with CaO > 8,5 wt.%. The exsolution temperatures were estimated to 980-800°C. The main reasons for the appearance of the Ca-Fe olivine in the parabasalts are the composition of the initial melt enriched in FeO and CaO, fractional crystallisation resulting in further enrichment in iron of the residual low-silica melt, and reducing conditions during olivine crystallisation and exsolution. | |
dc.subject | Ca-Fe olivine | |
dc.subject | fayalite | |
dc.subject | kirschsteinite | |
dc.subject | exsolution | |
dc.subject | burned spoil-heap | |
dc.title | FAYALITE AND KIRSCHSTEINITE SOLID SOLUTIONS IN MELTS FROM BURNED SPOIL-HEAPS, SOUTH URALS, RUSSIA | |
dc.type | Статья |
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