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Retrospective Mineragenic Analysis of Deposits of the Vishera Diamond-Bearing Zone (Eastern Margin of the Russian Platform)статья
- Автор: Nikulin I.I.
- Журнал: Geology of Ore Deposits
- Том: 64
- Номер: 1
- Год издания: 2022
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: S43
- Последняя страница: S59
- DOI: 10.1134/S1075701522090069
- Аннотация: Abstract—Systematized information on the formation of all types of diamond placers in the Vishera diamon- diferous zone is given for the first time. The method of retrospective restoration of the diamond-bearing deposits made it possible to identify the five major stages of their genesis: modern, Neogene–Quaternary, Mesozoic–pre-Neogene, and Lower Silurian. Modern and Quaternary placers are represented by alluvial and deluvial–proluvial deposits consisting of almost unaltered Neogene–Quaternary formations. In terms of mineral composition, Cenozoic (Neogene–Quaternary) deposits are inherited from the Riphean–Vendian to Neogene deposits, repeatedly redeposited in different epochs of denudation. Due to fluvioglacial pro- cesses, earlier diamond-bearing deposits were eroded a few times and products of erosion were transported to other areas of the zone without significant changes. The Mesozoic giant diamond-bearing karst landforms are composed of deposits, formed as a result of erosion of the contact zones between the Polyudov–Kolchim rocks with the Takata basal unit with dolomites inside the Kolchim Formation. In general, the diamond- bearing sandy deposits of the Lower Silurian basal unit and the Takata Formation have no lithological or geo- chemical links. The Takata deposits are mainly alluvial, while the Lower Silurian ones are coastal marine. Geophysical methods make it possible to outline the lithofacies area, which will indicate possible kimberlite fields of the Russian Plate or unknown intermediate diamond collectors.Keywords: minerageny, diamonds, Vishera zone, Russian platform
- Добавил в систему: Никулин Иван Иванович