Академическое издательство «Гео»

Keywords: morphostructures, gold placers, formation-geomorphological complexes, epochs of placer formations, alluvium.



GEOGRAPHY AND NATURAL RESOURCES, 2016, № 3, p. 111-117

Morphostructural regionalization of the territory of Sayano-Tuvinskoe Highland

S.G. Prudnikov

prudnikov_s@inbox.ru

A two-dimensional neotectonic fault-block model has been constructed for the region with gold mineralization elements, based on morphostructural investigations. The following types of morphostructures were identified: blocks of stable downthrows; blocks of weak downthrows; blocks of piedmont weak uplifts remaining in a state of stable rest; blocks of less intense uplifts; blocks of stable intense uplifts; blocks of the most intense uplifts, and fault-line blocks of constant downthrows in the presence of a general uplift: internal depressions occurring in old valleys or fault-line graben-hollows. This typology served as a basis for a formation-geomorphological regionalization of the study area, and for identification of formation-geomorphological complexes: peniplains, ancient topography and pediplains, fault-line graben-hollows, incision zones, and zones of increased tectonic activity. Each of the complexes presented is characterized by particular conditions of concentration of placer-forming gold with the production of particular morphogenetic types of placers. The potential placer gold content in the identified formation-geomorphological complexes is reassessed, which makes it possible to forecast the new types of placer deposits hitherto unknown in the region, such as the composite types of pre-Quaternary placers associated with weathering crusts and deposits in the valleys of the old hydrographic network.

Keywords: morphostructures, gold placers, formation-geomorphological complexes, epochs of placer formations, alluvium.

DOI: 10.21782/GiPR0206-1619-2016-3(111-117)

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