Инд. авторы:	Sklyarov E.V., Lavrenchuk A.V., Doroshkevich A.G., Starikova A.E., Kanakin S.V.
Заглавие:	Pyroxenite as a Product of Mafic-Carbonate Melt Interaction (Tazheran Massif, West Baikal Area, Russia)
Библ. ссылка:	Sklyarov E.V., Lavrenchuk A.V., Doroshkevich A.G., Starikova A.E., Kanakin S.V. Pyroxenite as a Product of Mafic-Carbonate Melt Interaction (Tazheran Massif, West Baikal Area, Russia) // MINERALS. - 2021. - Vol.11. - Iss. 6. - Art.654.
Внешние системы:	DOI: 10.3390/min11060654; РИНЦ: 46824912; WoS: 000666260000001;
Реферат:	eng: Pyroxenite and nepheline-pyroxene rocks coexist with dolomite-bearing calcite marbles in Tazheran Massif in the area of Lake Baikal, Siberia, Russia. Pyroxenites occur in a continuous elongate zone between marbles and beerbachites (metamorphosed gabbro dolerites) and in 5 cm to 20 m fragments among the marbles. Pyroxene in pyroxenite is rich in calcium and alumina (5-12 wt% Al2O3) and has a fassaite composition. The Tazheran pyroxenite may originate from a mafic subvolcanic source indicated by the presence of remnant dolerite found in one pyroxenite body. This origin can be explained in terms of interaction between mafic and crust-derived carbonatitic melts, judging by the mineralogy of pyroxenite bodies and their geological relations with marbles. According to this model, the intrusion of mantle mafic melts into thick lower crust saturated with fluids caused partial melting of silicate-carbonate material and produced carbonate and carbonate-silicate melts. The fassaite-bearing pyroxenite crystallized from a silicate-carbonate melt mixture which was produced by roughly synchronous injections of mafic, pyroxenitic, and carbonate melt batches. The ascending hydrous carbonate melts entrained fragments of pyroxenite that crystallized previously at a temperature exceeding the crystallization point of carbonates. Subsequently, while the whole magmatic system was cooling down, pyroxenite became metasomatized by circulating fluids, which led to the formation of assemblages with garnet, melilite, and scapolite.
Ключевые слова:	NOMENCLATURE; MAGMA; SYSTEM; SKARN; ISOTOPE; ASSIMILATION; ROCKS; MARBLE DYKES; Tazheran Massif; Early Paleozoic orogeny; metasomatism; fluids; silicate-carbonate melt interaction; carbonate melt; mafic melt; gabbro dolerite; marble; pyroxenite; OLKHON REGION; PEROVSKITES;
Издано:	2021
Физ. характеристика:	654
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