Gas-volumetric method for the analysis of carbonate rocks
Abstract
A large number of deposits of ores of various metals and many non-metallic minerals are associated with carbonate rocks. According to I. I. Knyazev, more than half of the world's production of zinc and lead comes from deposits occurring in limestones and dolomites. Polymetallic deposits of the replacement type in limestones and skarn-type deposits are widespread in Transbaikalia, Central Asia, and other ore regions. According to V. S. Kormilitsyn, about 90% of polymetallic deposits in one of the regions of Eastern Transbaikalia, including all the larger objects, are confined to dolomites; about 8% of deposits are in limestones. Many deposits of iron, manganese, copper, silver, gold, mercury, and other metals are associated with carbonate rocks. In many ore regions of the Union, lead-zinc and other hydrothermal mineralization, as noted by F. I. Wolfson, is localized within structural levels enriched in carbonate sequences, while such mineralization is completely absent in deeper structural levels composed of various shales, quartzites, effusive rocks, and other rocks enriched in aluminosilicate components. Epigenetic mineralization forming among carbonate rocks is more often observed in dolomite horizons than in limestones. In this connection, the identification of dolomites acquires significant importance in geological mapping and prospecting.
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