DEPLETED SSZ TYPE MANTLE PERIDOTITES IN PROTEROZOIC EASTERN SAYAN OPHIOLITES IN SIBERIA
https://doi.org/10.5800/GT-2017-8-3-0298
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
Тайвань
Taipei;
Department of Geosciences, Taipei
Zhuyin Chu
Institute of Geology and Geophysics, Chinese Academy of Sciences
Китай
Beijing
Китай
Beijing
M. A. Gornova
A.P. Vinogradov Institute of Geochemistry, Siberian Branch of RAS
Россия
Irkutsk
Россия
Irkutsk
S. Dril
A.P. Vinogradov Institute of Geochemistry, Siberian Branch of RAS
Россия
Irkutsk
Россия
Irkutsk
V. A. Belyaev
Institute of Earth Sciences, Academia Sinica
A.P. Vinogradov Institute of Geochemistry, Siberian Branch of RAS
Тайвань
Тайвань
Taipei;
Irkutsk
Kuan-Yu Lin
Institute of Earth Sciences, Academia Sinica;
National Taiwan University
Тайвань
Тайвань
Taipei;
Department of Geosciences, Taipei
Suzanne Y. O’Reilly
Macquarie University
Австралия
Австралия
CCFS/GEMOC Key Centre, Department of Earth and Planetary Sciences,
Sydney
Список литературы
1. Dick H.J.B., Bullen T., 1984. Chromian spinel as a petrogenetic indicator in abyssal and alpine-type peridotites and spatially associated lavas. Contributions to Mineralogy and Petrology 86 (1), 54–76. https://doi.org/10.1007/ BF00373711.
2. Dobretsov N.L., Konnikov E.G., Medvedev V.N., Sklyarov E.V., 1985. Ophiolites and olistostromes of the Eastern Sayan. In: N.L. Dobretsov (Ed.), Riphean – Early Paleozoic ophiolites of Northern Eurasia. Nauka, Novosibirsk, p. 34–58 (in Russian).
3. Khain E.V., Bibikova E.V., Kröner A., Zhuravlev D.Z., Sklyarov E.V., Fedotova A.A., Kravchenko-Berezhnoy I.R., 2002. The most ancient ophiolite of the Central Asian fold belt: U-Pb and Pb-Pb zircon ages for the Dunzhugur complex, Eastern Sayan, Siberia, and geodynamic implications. Earth and Planetary Science Letters 199 (3–4), 311–325. https://doi.org/10.1016/S0012-821X(02)00587-3.
4. Kovach V.P., Rytsk E.Yu., Salnikova E.B., Yakovleva S.Z., Fedoseenko A.M., Skopintsev V.G., Lykhin D.A., 2012. New U-Pb (TIMS) geochronological data on age of tonalities of the Sumsunur complex of the Gargan Glyba – to discussion on Palaeozoic organics in ancient sequences of the East Sayan. In: V Russian conference on isotope geochronology. Conference abstracts. Institute of Geology of Ore Deposits, Petrography, Mineralogy and Biochemistry, Russian Academy of Sciences, Moscow, p. 158–160 (in Russian).
5. Kuzmichev A.B., 2004. Tectonic History of the Tuva-Mongolian Massif: Early Baikalian, Late Baikalian and Early Caledonian stages. PROBEL-2000, Moscow, 192 p. (in Russian).
6. Kuzmichev A.B., Bibikova E.V., Zhuravlev D.Z., 2001. Neoproterozoic (~800 Ma) orogeny in the Tuva–Mongolia massif (Siberia): island arc–continent collision at the northeast Rodinia margin. Precambrian Research 110 (1–4), 109–126. https://doi.org/10.1016/S0301-9268(01)00183-8.
7. Kuzmichev A.B., Larionov A.N., 2013. Neoproterozoic island arcs in East Sayan: duration of magmatism (from U–Pb zircon dating of volcanic clastics). Russian Geology and Geophysics 54 (1), 34–43. https://doi.org/10.1016/j.rgg. 2012.12.003.
8. McDonough W.F., Sun S.-S., 1995. The composition of the Earth. Chemical Geology 120 (3–4), 223–253. https://doi.org/ 10.1016/0009-2541(94)00140-4.
9. O'Reilly S.Y., Zhang M., Griffin W.L., Begg G., Hronsky J., 2009. Ultradeep continental roots and their oceanic remnants: A solution to the geochemical “mantle reservoir” problem? Lithos 112 (Supplement 2), 1043–1054. https://doi.org/ 10.1016/j.lithos.2009.04.028.
10. Parkinson I.J., Pearce J.A., 1998. Peridotites from the Izu–Bonin–Mariana forearc (ODP Leg 125): evidence for mantle melting and melt–mantle interaction in a supra-subduction zone setting. Journal of Petrology 39 (9), 1577–1618. https://doi.org/10.1093/petroj/39.9.1577.
11. Sklyarov E.V., Kovach V.P., Kotov A.B., Kuzmichev A.B., Lavrenchuk A.V., Perelyaev V.I., Shchipansky A.A., 2016. Boninites and ophiolites: problems of their relations and petrogenesis of boninites. Russian Geology and Geophysics 57 (1), 127–140. https://doi.org/10.1016/j.rgg.2016.01.009.
Рецензия
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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