Petrology of granitoids of South-Eastern regions of Polousnyi range (Verkhoyansk-Kolyma orogenic region)
https://doi.org/10.31242/2618-9712-2018-25-3-53-70
Abstract
The article deals with specificity of compositions of Cretaceous granitoids of South-Eastern spurs of the Polousnyi range, localized in the zone of joint (articulation) of the Polousnyi, Selennyakh and Tuostakh anticlinoriums, characterized by a wide development of long-lived tectonic disorders. It is shown that in the Cretaceous time this territory was a scene of intensive manifestation of granitoid magmatism – supersubduction of early orogenic M-type, late orogenic active continental margin of I-type, post-orogenic or riftogenic A-type. It is established that all granitoids are geochemically specialized in As and Ag, and in the majority also in Au, and conditions of their crystallization were favorable for formation of gold-rare-metal and/or silver-arsenic mineralization. Generality of the geochemical specialization of granitoids, high concentrations of Th, U, HREE, Cr, V and Co in them indicate the presence of an external (deep) source constantly acting here in the Cretaceous era, contributing to the provision of further heat and fluids, in all probability, associated with the rise of alkaline-basic diapirs.
Supporting agencies: The study was carried out according to the plan of research and development work of Diamond and Precious Metal Geology Institute SB RAS (project 0381-2016-0001).
About the Authors
Vera Arkadievna Trunilina
Diamond and Precious Metal Geology Institute SB RAS
Russian Federation
Russian Federation
TRUNILINA Vera Arkadievna, Doctor of Geological and Mineralogical Sciences, Chief Researcher, Diamond and Precious Metal Geology Institute SB RAS, 39 Lenin Ave., Yakutsk, 677980, Russia, http://orcid.org/0000-0003-0910-2386, v.a.trunilina@diamond.ysn.ru;
Sergei Prokopievich Roev
Diamond and Precious Metal Geology Institute SB RAS
Russian Federation
Russian Federation
ROEV Sergei Prokopievitch, Candidate of Geological and Mineralogical Sciences, Senior Researcher, Diamond and Precious Metal Geology Institute SB RAS, 39 Lenin Ave., Yakutsk, 677980, Russia, http://orcid.org/0000-0003-3911-2491, s.p.roev@diamond.ysn.ru
Albert Ivanovitch Zaitsev
Diamond and Precious Metal Geology Institute SB RAS
Russian Federation
Russian Federation
ZAITSEV Albert Ivanovitch, Candidate of Geological and Mineralogical Sciences, Leading Researcher, Diamond and Precious Metal Geology Institute SB RAS, 39 Lenin Ave., Yakutsk, 677980, Russia, http://orcid.org/0000-0001-8799-1342, a.i.zaitsev@diamond.ysn.ru.
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Review
For citations:
Trunilina V.A., Roev S.P., Zaitsev A.I. Petrology of granitoids of South-Eastern regions of Polousnyi range (Verkhoyansk-Kolyma orogenic region). Arctic and Subarctic Natural Resources. 2018;23(3):53-74. (In Russ.) https://doi.org/10.31242/2618-9712-2018-25-3-53-70
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