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Regional Geology and Metallogeny
Journal Contents
2021
88

G. A. KOZLOV, S. V. KASHIN, V. E. GUZEV, A. V. MOLCHANOV, A. V. TEREKHOV (VSEGEI)

Mineralogical and geochemical features and ore potential of apocarbonate-siliceous hydrothermally altered rocks in the Early Cambrian deposits of the Sinsk-Botomian Formation, Republic of Sakha (Yakutia)

The article describes new data on petrography and geochemistry of hydrothermally altered rocks in Early Cambrian deposits of the southeastern part of the Sinsk-Botomian Formation and their relationship with MVT-type lead-zinc mineralization. In this area, the mineralization was first identified as a hydrothermal metasomatic system and referred to the tectonogenic carbonate-siliceous hydrothermal formation. Their genetic relationship with the Late Devonian – Early Carboniferous of continental rifting in the eastern Siberian Platform is determined. The composition and type of the rock- generating fluid is simulated. It is shown that halos of carbonate-siliceous hydrothermal mineralization, combined with multiplicative Pb, Zn, Mn, Ag and Sr anomalies in the bedrock can be used as one of the criteria for predicting the MVT-type mineralization in the Early Paleozoic carbonate cover of the Siberian platform.
Keywords: carbonate sediments, geochemical features, hydrothermally altered rock, carbonate-siliceous metasomatism, dolomitization, Mssissippian-type deposits.


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