NDLI: Age of the Ust’-Gilyui sequence in the Stanovoi Complex of the Selenga-Stanovoi Superterrain, Central Asian fold belt

Content Provider	Springer Nature Link
Author	Velikoslavinskii, S. D. Kotov, A. B. Salnikova, E. B. Larin, A. M. Sorokin, A. A. Sorokin, A. P. Kovach, V. P. Tolmacheva, E. V. Yakovleva, S. Z. Anisimova, I. V.
Copyright Year	2012
Abstract	According to the results of U-Pb geochronological investigations, the age of the amphibolite protoliths (metabasalts) in the Ust’-Gilyui sequence within the Stanovoi Complex of the Amazar-Gilyui structural and formational zone in the Selenga-Stanovoi Superterrain of the Central Asian fold belt can be estimated at 193 ± 1 Ma. The Nd model age of the Ust’-Gilyui metasedimentary rocks is in the interval of t $_{Nd}$(DM) = 1.1–3.1 Ga. This information along with the previously obtained geochronological data are indicative of the fact that the Ust’-Gilyui sequence consists of metasedimentary and metavolcanic rocks of various ages: (1) volcanic rocks with the age of 193 ± 1 Ma; (2) metasedimentary and metavolcanic rocks broken through by the Paleozoic granitoids dated to 370 Ma and characterized by minimum estimations of t $_{Nd}$(DM) = 1.1 Ga, i.e., rocks with an age of 1.1–0.4 Ga. In addition, it is quite possible that this sequence also includes more ancient rocks. The SSS Amazar-Gilyui structural and formational zone is likely to be a tectonic mélange composed of the metasedimentary and metavolcanic rocks of the Mesozoic and, probably, Paleozoic and Early Precambrian ages. The studied zone was formed in the Mesozoic, most likely, in the course of the collision processes initiated by the closing up of the Mongol-Okhotsk Ocean.
Starting Page	661
Ending Page	665
Page Count	5
File Format	PDF
ISSN	1028334X
Journal	Doklady Earth Sciences
Volume Number	444
Issue Number	2
e-ISSN	15318354
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2012-07-06
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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