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Геодинамика и тектонофизика

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DEPLETED SSZ TYPE MANTLE PERIDOTITES IN PROTEROZOIC EASTERN SAYAN OPHIOLITES IN SIBERIA

https://doi.org/10.5800/GT-2017-8-3-0298

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Аннотация

N.L. Dobretsov et al. [1985] first described the rock complexes in Eastern Sayan as ophiolites. Ophiolites formed in Dunzhugur island arc and were obducted onto Gargan block, a Neoarchean crystalline basement of the Tuva-Mongolian Massif (TMM), as a single nappe [Khain et al., 2002; Kuzmichev, 2004]. Zircons from plagiogranite were dated at 1021±5 Ma by multigrain TIMS and 1020±1 Ma by Pb-Pb single-grains evaporation method [Khain et al., 2002]. Later [Kuzmichev, Larionov, 2013] analysed 12 grains of detrital zircons from gravelstone of the Dunzhugur formation and obtained 206Pb/238U ages from 844±8 to 1048±12 Ma. Careful examination of these data shows that 206Pb/238U ages for concordant zircons only vary from 962±11 to 1048±12 Ma.

Об авторах

Kuo-Lung Wang
Institute of Earth Sciences, Academia Sinica; National Taiwan University
Тайвань

Taipei;

Department of Geosciences, Taipei



Zhuyin Chu
Institute of Geology and Geophysics, Chinese Academy of Sciences
Китай
Beijing


M. A. Gornova
A.P. Vinogradov Institute of Geochemistry, Siberian Branch of RAS
Россия
Irkutsk


S. Dril
A.P. Vinogradov Institute of Geochemistry, Siberian Branch of RAS
Россия
Irkutsk


V. A. Belyaev
Institute of Earth Sciences, Academia Sinica A.P. Vinogradov Institute of Geochemistry, Siberian Branch of RAS
Тайвань

Taipei;

Irkutsk



Kuan-Yu Lin
Institute of Earth Sciences, Academia Sinica; National Taiwan University
Тайвань

Taipei;

Department of Geosciences, Taipei



Suzanne Y. O’Reilly
Macquarie University
Австралия

CCFS/GEMOC Key Centre, Department of Earth and Planetary Sciences, 

Sydney



Список литературы

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Для цитирования:


Wang K., Chu Z., Gornova M.A., Dril S., Belyaev V.A., Lin K., O’Reilly S. DEPLETED SSZ TYPE MANTLE PERIDOTITES IN PROTEROZOIC EASTERN SAYAN OPHIOLITES IN SIBERIA. Геодинамика и тектонофизика. 2017;8(3):583-587. https://doi.org/10.5800/GT-2017-8-3-0298

For citation:


Wang K., Chu Z., Gornova M.A., Dril S., Belyaev V.A., Lin K., O’Reilly S.Y. DEPLETED SSZ TYPE MANTLE PERIDOTITES IN PROTEROZOIC EASTERN SAYAN OPHIOLITES IN SIBERIA. Geodynamics & Tectonophysics. 2017;8(3):583-587. https://doi.org/10.5800/GT-2017-8-3-0298

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