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The Chemical Mechanism of the Formation of Fluorite-Barite-Siderite Carbonatite in Karasug Fe-F-Ba-Sr-REE Deposit
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, RAS, Moscow, Russia
- 1 Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, RAS, Moscow, Russia
Open Journal of Geology·Volume 08 (2018)·Pages 399–403·Published 13 April 2018·DOI10.4236/ojg.2018.84023
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Abstract
Intrusive fluorite-barite-siderite carbonatite of Karasug deposit (Tuva) crystallized from ionic salt melt is dominated by iron chloride with the participation of alkali metal salts. Melt composition and main reaction of mineral formation: NaFeCl 3 + 4KF + 2Na 2 Ca(CO 3 ) 2 + Na 2 Ba(CO 3 ) 2 + Na 2 SO 4 = 6FeCO 3 + 2CaF 2 + BaSO 4 + 14NaCl + 4KCl. The highest temperature (550 ° C - 650 ° C) brine-melt inclusions in minerals are pseudo-primary. Their predominant Na-K-chloride composition does not correspond to the primary melt, but is close to the residual brine-melt.
KeywordsFerrocarbonatite Ionic MeltChemical Reactions
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