A. V. TEREKHOV, A. V. MOLCHANOV, N. V. SHATOVA, V. N. BELOVA

TWO TYPES OF OREBEARING GUMBAITES FROM THE ELKON GOLDURANIUM CLUSTER (SOUTH YAKUTIA)

Two structural blocks with significantly different features of the geological structure, types of developed ore-bearing alteration formations and the actual gold-uranium mineralization can be distinguished in the Elkon gold-uranium ore cluster. The south-eastern block characterized by the presence of ore-bearing gumbeiti of «elkonskey» alteration type (142 ± 5–152 ± 6 Ma) with gold-uranium mineralization participating in the structure of long-lived regional zones of faults. Within the north-western block mineralized gumbeity of «ryabinovy» alteration type (129.1 ± 1.2 Ma) with gold-copper mineralization tending to areas of mesozoic alkaline magmatic rocks are widespread. It made possible to propose a two-stage geologicalgenetic model for the formation of gold-uranium ore objects of the Elkon ore cluster.

Keywords: gumbeiti, ore-bearing, Elkon gold-uranium ore cluster, South Yakutia