Email this article Middle Paleozoic Rhyolite of the Gorny and Rudny Altai: Geochronology and Composition
- Authors: Aoki S.1, Sun M.2, Naryzhnova A.V.3,4, Kuibida M.L.3,4, Timkin V.I.5, Krivchikov V.A.5, Murzin O.V.6, Krupchatnikov V.I.5, Popova O.M.5, Kruk N.N.3,4, Rudnev S.N.3, Kuibida Y.V.3, Shokal’sky S.P.1, Gusev N.I.1, Komiya T.7
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Affiliations:
- Karpinsky All-Russia Geological Research Institute (VSEGEI)
- Department of Earth Sciences, University of Hong Kong
- Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences
- Novosibirsk State University
- Gorny Altai Expedition
- East Siberian Methodical Expedition, Siberian Research Institute of Geology, Geophysics, and Mineral Resources
- University of Tokyo
- Issue: Vol 487, No 2 (2019)
- Pages: 885-889
- Section: Geology
- URL: https://ogarev-online.ru/1028-334X/article/view/195302
- DOI: https://doi.org/10.1134/S1028334X19080130
- ID: 195302
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Abstract
The paper reports the results of geological, geochemical, and isotope–geochronological studies of subvolcanic rhyolites of NW Gorny Altai and Rudny Altai, which belong to the large Hercynian volcanic systems: Altai-Minusa and Altai–Salair, respectively. U–Pb zircon dating revealed two age groups: ~410–405 and 390–381 Ma. The isotope–geochemical characteristics of the rhyolites demonstrate high εNd(Т) from +2.6 to 6.0 with relatively young model ages T(DM) = 851–966 Ma in Rudny Altai and older model ages, up to 1266 Ma, in NW Gorny Altai. The rhyolites show transitional geochemical signatures between within-plate and island-arc felsic magmas. The results obtained are consistent with two-stage evolution of volcanism and its migration from the continent to the ocean.
About the authors
S. Aoki
Karpinsky All-Russia Geological Research Institute (VSEGEI)
Email: maxkub@igm.nsc.ru
Russian Federation, St Petersburg, 199106
M. Sun
Department of Earth Sciences, University of Hong Kong
Email: maxkub@igm.nsc.ru
China, Hong Kong
A. V. Naryzhnova
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences; Novosibirsk State University
Email: maxkub@igm.nsc.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090
M. L. Kuibida
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences; Novosibirsk State University
Author for correspondence.
Email: maxkub@igm.nsc.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090
V. I. Timkin
Gorny Altai Expedition
Email: maxkub@igm.nsc.ru
Russian Federation, Biiskii district, Altaiiskii Krai
V. A. Krivchikov
Gorny Altai Expedition
Email: maxkub@igm.nsc.ru
Russian Federation, Biiskii district, Altaiiskii Krai
O. V. Murzin
East Siberian Methodical Expedition, Siberian Research Institute of Geology, Geophysics, and Mineral Resources
Email: maxkub@igm.nsc.ru
Russian Federation, Novosibirsk
V. I. Krupchatnikov
Gorny Altai Expedition
Email: maxkub@igm.nsc.ru
Russian Federation, Biiskii district, Altaiiskii Krai
O. M. Popova
Gorny Altai Expedition
Email: maxkub@igm.nsc.ru
Russian Federation, Biiskii district, Altaiiskii Krai
N. N. Kruk
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences; Novosibirsk State University
Email: maxkub@igm.nsc.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090
S. N. Rudnev
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences
Email: maxkub@igm.nsc.ru
Russian Federation, Novosibirsk, 630090
Y. V. Kuibida
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences
Email: maxkub@igm.nsc.ru
Russian Federation, Novosibirsk, 630090
S. P. Shokal’sky
Karpinsky All-Russia Geological Research Institute (VSEGEI)
Email: maxkub@igm.nsc.ru
Russian Federation, St Petersburg, 199106
N. I. Gusev
Karpinsky All-Russia Geological Research Institute (VSEGEI)
Email: maxkub@igm.nsc.ru
Russian Federation, St Petersburg, 199106
T. Komiya
University of Tokyo
Email: maxkub@igm.nsc.ru
Japan, Tokyo
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