Инд. авторы:	Mikhno A.O., Korsakov A.V.
Заглавие:	Carbonate, silicate, and sulfide melts: heterogeneity of the UHP mineral-forming media in calc-silicate rocks from the Kokchetav massif
Библ. ссылка:	Mikhno A.O., Korsakov A.V. Carbonate, silicate, and sulfide melts: heterogeneity of the UHP mineral-forming media in calc-silicate rocks from the Kokchetav massif // Russian Geology and Geophysics. - 2015. - Vol.56. - Iss. 1-2. - P.81-99. - ISSN 1068-7971. - EISSN 1878-030X.
Внешние системы:	DOI: 10.1016/j.rgg.2015.01.005; РИНЦ: 24019203; SCOPUS: 2-s2.0-84925337782; WoS: 000351312200005;
Реферат:	eng: We present data on carbonatite, silicate, and sulfide melts and their immiscibility at different stages of ultrahigh-pressure metamorphism of rocks of the Kokchetav Massif (northern Kazakhstan). The identified silicate, silicate-carbonate, and sulfide inclusions are regarded as crystallization products of high-pressure melts. The detected reactionary garnet-K-feldspar-allanite-calcite symplectite structures as inclusions in garnet and as identical structures around it evidence that they resulted from carbonatite melt crystallization. Carbonate melting was probably triggered by the present free fluid phase (mostly H2O) and/or a high content of alkalies in the system. The coexistence of carbonate and silicate inclusions testifies to the immiscibility of carbonatite and silicate melts. The presence of K-cymrite in the polyphase inclusions indicates that the minimum pressure of silicate melt intake is similar to 4.5 GPa. The maximum pressure of this intake is 6-7 GPa at 1000-1100 degrees C and corresponds to the peak of metamorphism of the Kokchetav Massif rocks. Most likely, the field of immiscibility of carbonatite and silicate melts lies within 4.5-7 GPa and 950-1100 degrees C. The carbonatite melt can dissolve up to 18 wt.% SiO2, and the silicate melt, up to 4.5 vol.% CaCO3. (C) 2015, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved.
Ключевые слова:	KUMDY-KOL; WESTERN ALPS; IMPURE MARBLES; STABILITY FIELD; SUBDUCTION ZONES; GEODYNAMIC EVOLUTION; DIAMOND-BEARING; 6 GPA; PRESSURE METAMORPHIC ROCKS; Kokchetav massif; sulfide melt; silicate melt; carbonatite melt; ultrahigh-pressure metamorphism; partial melting; NORTHERN-KAZAKSTAN;
Издано:	2015
Физ. характеристика:	с.81-99