Известия Томского политехнического университета: Инжиниринг георесурсов (Apr 2020)

TYPES, DISTRIBUTION AND PERSPECTIVES OF PALEOGENE AND NEOGENE ALLUVIAL GOLD IN WEST-KALBA GOLD-BEARING DISTRICT (EAST KAZAKHSTAN)

  • Alexander V. Tretyakov,
  • Saida A. Nigmatova,
  • Umil B. Gabitova

DOI
https://doi.org/10.18799/24131830/2020/4/2603
Journal volume & issue
Vol. 331, no. 4
pp. 156 – 169

Abstract

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The relevance of the research is conditioned by the need to expand the raw mineral base of the gold-mining enterprises of the Republic of Kazakhstan and scientific substantiation of prospects of involvement into exploitation of Paleogene and Neogene alluvial gold deposits, their formation conditions and placement patterns not being comprehensively assessed so far, despite the fact of their productivity is a very large multiple of the potential of the Quaternary alluvial gold. The aim of the research is to strengthen the raw mineral base of alluvial gold deposits of the Republic of Kazakhstan, increase its development efficacy on account of studies of the paleographic, paleoclimatic and neotectonic conditions of the Cenozoic placer localization and detailing the criteria of their research in the area of the West Kalba gold-bearing district, East Kazakhstan. Objects: Paleogene and Neogene alluvial gold, the ancient placer-localising relief and hosting rocks. Methods: analysis of the existing data on alluvial gold of the Paleogene and Neogene age, further elaboration of characteristics of ancient valleys and intermontane depressions by deciphering satellite images; carrying out the geological and geomorphological observation, mapping of the Paleogene and Neogene deposits, study of their gold-content, complex detailed study and sampling of the most complete sections. Results. It is established that the Paleogene and Neogene alluvial gold is localized in ancient valleys and depressions, their formation period lasting the significant time interval, from the Oligocene to the Pliocene. They are represented by alluvial, alluvial-proluvial and proluvial placers, including the large-volume alluvial-proluvial placers, localized in depressions and dominated by small fine gold. The Paleogene and Neogene placers are distributed according to spatial-paragenetic relation with route sources, and their geological and geomorphological types are defined by the local geomorphological zonality.

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