Sedimentary complexes of the cover of the Dzabkhan continental block: Different sedimentary basins and source areas


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Аннотация

The geochemical and Sm–Nd isotope characteristics of Late Precambrian and Early Cambrian sandstones previously related to the sedimentary cover of the Dzabkhan continental block are reported. It is established that the Riphean and Vendian sedimentary rocks of the Ul’zitgol’skaya and Tsaganolomskaya Formations were accumulated within the Dzabkhan continental block as a result of recycling of the terrigenous deposits formed at the expense of destruction of basement rocks and younger granite. The formation of terrigenous rocks of the Bayangol’skaya Formation after a gap in sedimentation occurred in the sedimentary basin, where only the Late Riphean formations of the juvenile crust, probably of the Dzabkhan–Mandal block were the sources, without the contribution of the ancient crustal material. The Tsaganolomskaya and Bayangol’skaya Formations were formed in different sedimentary basins and cannot be related to the same complex.

Авторлар туралы

E. Letnikova

Sobolev Institute of Geology and Mineralogy, Siberian Branch

Хат алмасуға жауапты Автор.
Email: efletnik@igm.nsc.ru
Ресей, Akad. Koptyuga pr. 3, Novosibirsk, 630090

I. Vishnevskaya

Sobolev Institute of Geology and Mineralogy, Siberian Branch

Email: efletnik@igm.nsc.ru
Ресей, Akad. Koptyuga pr. 3, Novosibirsk, 630090

F. Letnikov

Institute of the Earth’s Crust, Siberian Branch

Email: efletnik@igm.nsc.ru
Ресей, ul. Lermontova 128, Irkutsk, 664033

N. Vetrova

Sobolev Institute of Geology and Mineralogy, Siberian Branch

Email: efletnik@igm.nsc.ru
Ресей, Akad. Koptyuga pr. 3, Novosibirsk, 630090

S. Shkolnik

Institute of the Earth’s Crust, Siberian Branch

Email: efletnik@igm.nsc.ru
Ресей, ul. Lermontova 128, Irkutsk, 664033

Yu. Kostitsyn

Vernadsky Institute of Geochemistry and Analytical Chemistry

Email: efletnik@igm.nsc.ru
Ресей, ul. Kosygina 19, Moscow, 119991

E. Karakovskii

Sobolev Institute of Geology and Mineralogy, Siberian Branch

Email: efletnik@igm.nsc.ru
Ресей, Akad. Koptyuga pr. 3, Novosibirsk, 630090

L. Reznitskii

Institute of the Earth’s Crust, Siberian Branch

Email: efletnik@igm.nsc.ru
Ресей, ul. Lermontova 128, Irkutsk, 664033

N. Kanygina

Geological Institute

Email: efletnik@igm.nsc.ru
Ресей, Pyzhevsky per. 35, Moscow, 119017

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