Journal
RUSSIAN GEOLOGY AND GEOPHYSICS
Volume 50, Issue 5, Pages 438-452Publisher
RUSSIAN ACAD SCIENCES, SIBERIAN BRANCH, VS SOBOLEV INST GEOL & MINEROL
DOI: 10.1016/j.rgg.2009.04.002
Keywords
A-type granites; isotope geochemistry; geochronology; zircon thermometry; numerical modeling; geodynamics; Neoproterozoic orogen; Yenisei Ridge
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Funding
- Russian Foundation for Basic Research [06-05-64400, 07-0500703, 08-05-00733, 08-05-00208]
- Siberian Branch of the RAS [116, 7.10.1]
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Results of complex geological, petrological, geochemical, and isotope-geochronological studies of Neoproterozoic postcollisional A-type granites of the Glushikha complex, Yenisei Ridge, are presented, as well as results of mathematical modeling. The localization, sizes, and depths of formation of magmatic bodies and the physicochemical conditions of the formation of granite intrusions and their magmatic sources are considered. The research is focused on the modeling of the thermal history of the formation and subsequent cooling of granites in the collision orogen. The modeling of heat transfer during the acid-magma intrusion was performed by the example of the Lendakha and Glushikha leucogranite plutons. With the combined methods of the modeling of heat transfer and the behavior of K/Ar isotopic system, the models for leucogranite pluton cooling have been verified for the first time. The time of formation and cooling of granite bodies is estimated, and a generalized geodynamic model for the formation of the Glushikha postcollisional A-type leucogranites is proposed. (C) 2009, IGM, Siberian Branch of the RAS. Published by Elsevier B. V. All rights reserved.
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