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TYPES OF GOLD-POLYMETAL MINERALIZATION IN PRECAMBRIAN ROCKS OF THE NIMNYR TERRANE OF THE ALDAN-STANOVOY SHIELD (SOUTH OF THE NORTH ASIAN CRATON)

A. A. Kravchenko 1, G. S. Anisimova 1, V. I. Berezkin 1, N. V. Popov 2, E. E. Loskutov 1, A. I. Zhuravlev 1, Z. S. Nikiforova 1

1 Diamond and Precious Metal Geology Institute, SB RAS, Yakutsk, Russia; 2 A.A.Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, Novosibirsk, Russia

The study of material composition of the Early Precambrian continental earth crust contributes to the identification of its metallogeny. Deposits of graphite, phlogopite, and iron have been discovered in the Paleoproterozoic granulite complexes of the Aldan-Stanovoy Shield on the southern margin of the North Asian Craton, and the first gold deposit has recently been discovered. Deposits are confined to the extended boundary of the infra- and supracrustal complexes within which multistage deformations, intense metasomatosis and metamorphism of various facies are observed. Modern methods of microanalysis allow scientists to significantly supplement data on the mineral composition of deposits, characterize conditions of their formation and make a comparison. The paper considers the geological structure of granulite complexes of the central part of the Aldan-Stanovoy Shield and ore mineralization in graphite-bearing quartzites, phlogopite-containing skarns, gold-bearing crystalline shales and diaphthorites. Ore and wallrock mineral associations have been identified. The comparison was made with well-studied ore deposits near the border of the Karelian Craton. The types of mineralization and directions of comparative metallogenic analysis are discussed.

Keywords: North-Asian Craton, Paleoproterozoic, ore mineralization.

DOI 10.20403/2078-0575-2023-1-50-60

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