The formation conditions of labuntsovite-group minerals in the Kovdor massif,Kola Peninsula |
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Authors: | Email author" target="_blank">S?V?SokolovEmail author |
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Institution: | 1.Fedorovsky All-Russian Scientific Research Institute of Mineral Resources,Moscow,Russia |
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Abstract: | In the Kovdor massif, labuntsovite-group minerals occur in dolomite carbonatite veins (labuntsovite-Mg), in a natrolite-calcite vein (lemmleinite-Ba and labuntsovite-Fe), and in calcite pockets and veinlets cutting fenites (late labuntsovite-Mg). They are closely intergrown with paragenetic carbonates, and this makes it possible to estimate their crystallization temperature from the fluid inclusions entrapped in dolomite (≥265°C) and calcite (175–225°C). The earlier labuntsovite-Mg was formed under relatively acidic conditions, whereas later labuntsovite-calcite mineralization was derived from alkaline solutions. |
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