Author(s)

Alexander V. Bolonin

Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, RAS, Moscow, Russia.

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: NaFeCl₃ + 4KF + 2Na₂Ca(CO₃)₂ + Na₂Ba(CO₃)₂ + Na₂SO₄ = 6FeCO₃ + 2CaF₂ + BaSO₄ + 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.

Ferrocarbonatite Ionic Melt, Chemical Reactions

Bolonin, A. (2018) The Chemical Mechanism of the Formation of Fluorite-Barite-Siderite Carbonatite in Karasug Fe-F-Ba-Sr-REE Deposit. Open Journal of Geology, 8, 399-403. doi: 10.4236/ojg.2018.84023.