Post-collisional magmatism of western Chukotka and Early Cretaceous tectonic rearrangement in northeastern Asia
- Authors: Tikhomirov P.L.1, Prokof’ev V.Y.2, Kal’ko I.A.1, Apletalin A.V.1, Nikolaev Y.N.1, Kobayashi K.3, Nakamura E.3
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Affiliations:
- Geological Faculty
- Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
- Institute for Planetary Materials
- Issue: Vol 51, No 2 (2017)
- Pages: 131-151
- Section: Article
- URL: https://journal-vniispk.ru/0016-8521/article/view/156595
- DOI: https://doi.org/10.1134/S0016852117020054
- ID: 156595
Cite item
Abstract
The paper presents new data on the isotopic age and chemical composition of volcanic rocks from the Tytyl’veem and Mangazeika basins of western Chukotka superposed on Mesozoides of the Verkhoyansk–Chukotka Tectonic Region. The results of SIMS U–Pb zircon dating (121.4 ± 2.8 and 118.0 ± 2.0 Ma) corroborate the Aptian age of the Tytyl’veem Formation. This age, in turn, indicates its formation after closure of the South Anyui ocean (Neocomian), but before origination of the Okhotsk–Chukotka Belt (Albian–Campanian). Post-collisional Aptian igneous rocks are widespread in the northern Verkhoyansk–Chukotka Tectonic Region; the legth of the corresponding igneous province is no less than 1400 km. In geochemical characteristics, the post-collisional volcanic rocks occurring in Western Chukotka are similar with the rocks from Andean-type igneous belts.
About the authors
P. L. Tikhomirov
Geological Faculty
Author for correspondence.
Email: petr_tikhomirov@mail.ru
Russian Federation, Moscow, 119992
V. Yu. Prokof’ev
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
Email: petr_tikhomirov@mail.ru
Russian Federation, Moscow, 119017
I. A. Kal’ko
Geological Faculty
Email: petr_tikhomirov@mail.ru
Russian Federation, Moscow, 119992
A. V. Apletalin
Geological Faculty
Email: petr_tikhomirov@mail.ru
Russian Federation, Moscow, 119992
Yu. N. Nikolaev
Geological Faculty
Email: petr_tikhomirov@mail.ru
Russian Federation, Moscow, 119992
K. Kobayashi
Institute for Planetary Materials
Email: petr_tikhomirov@mail.ru
Japan, Yamada 827, Misasa, Tottori, 682-0193
E. Nakamura
Institute for Planetary Materials
Email: petr_tikhomirov@mail.ru
Japan, Yamada 827, Misasa, Tottori, 682-0193
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