Инд. авторы:	Nozhkin A.D., Popov N.V., Dmitrieva N.V., Storozhenko A.A., Vasilev N.F.
Заглавие:	Neoproterozoic collisional S-type granitoids of the Yenisei Ridge: petrogeochemical composition and U-Pb, Ar-Ar, and Sm-Nd isotope data
Библ. ссылка:	Nozhkin A.D., Popov N.V., Dmitrieva N.V., Storozhenko A.A., Vasilev N.F. Neoproterozoic collisional S-type granitoids of the Yenisei Ridge: petrogeochemical composition and U-Pb, Ar-Ar, and Sm-Nd isotope data // Russian Geology and Geophysics. - 2015. - Vol.56. - Iss. 5. - P.689-695. - ISSN 1068-7971. - EISSN 1878-030X.
Внешние системы:	DOI: 10.1016/j.rgg.2015.04.001; РИНЦ: 24027282; SCOPUS: 2-s2.0-84928801338; WoS: 000353998800001;
Реферат:	eng: Collisional granitoid magmatism caused by the Early Neoproterozoic orogeny in the west of the Siberian craton is considered. New data on the petrogeochemical composition, U-Pb (SHRIMP II), Ar-Ar, and Sm-Nd isotopic ages of the Middle Tyrada granitoid massif in the northwestern Yenisei Ridge are presented. Plagiogranites, granodiorites, and quartz diorites of the massif are of calcareous and calc-alkalic composition. The elevated alumina contents and presence of accessory garnet permit them to be assigned to S-type granitoids. Their spidergrams show Rb, Ba, and Th enrichment, minimum Nb, P, and Ti contents, and no Sr depletion. The granitoids formed through the melting of plagioclase-enriched graywacke source, obviously Paleoproterozoic metaterrigenous rocks of the Garevka Formation and Teya Group (T-Nd(DM) = 2.0-2.5 Ga), judging from the isotope composition of the granitoids (T-Nd(DM-2st) = 2200 Ma and epsilon(Nd)(T) = -6.0) and the presence of ancient zircon cores (1.80-1.85 Ga). Formation of granitoids took place in the final epoch of the Grenville collision events in the late Early Neoproterozoic (U-Pb zircon age is 857.0 +/- 9.5 Ma). In the Late Neoproterozoic, the granitoids underwent tectonothermal reworking caused by Vendian accretion and collision events on the southwestern margin of the Siberian craton, which explain the younger K-Ar biotite age, 615.5 +/- 6.3 Ma. (C) 2015, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved.
Ключевые слова:	petrogeochemistry; geochronology; Sm-Nd isotopy; Yenisei Ridge; SIBERIAN CRATON; WESTERN MARGIN; EVOLUTION; Early Neoproterozoic; MAGMATISM; RODINIA; AGE; COMPLEX; EVENTS; RECORD; RANGE; collisional granitoids;
Издано:	2015
Физ. характеристика:	с.689-695