Post-collisional magmatism of western Chukotka and Early Cretaceous tectonic rearrangement in northeastern Asia

P. L. Tikhomirov; V. Yu Prokof’ev; I. A. Kal’ko; A. V. Apletalin; Yu N. Nikolaev; K. Kobayashi; E. Nakamura

doi:10.1134/S0016852117020054

Post-collisional magmatism of western Chukotka and Early Cretaceous tectonic rearrangement in northeastern Asia

P. L. Tikhomirov, V. Yu Prokof’ev, I. A. Kal’ko, A. V. Apletalin, Yu N. Nikolaev, K. Kobayashi, E. Nakamura

Institute for Planetary Materials

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

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.

Original language	English
Pages (from-to)	131-151
Number of pages	21
Journal	Geotectonics
Volume	51
Issue number	2
DOIs	https://doi.org/10.1134/S0016852117020054
Publication status	Published - Mar 1 2017

Keywords

Early Cretaceous
geochemistry
geochronology
post-collisional magmatism
Verkhoyansk–Chukotka Region
western Chukotka

ASJC Scopus subject areas

Geology

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10.1134/S0016852117020054

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title = "Post-collisional magmatism of western Chukotka and Early Cretaceous tectonic rearrangement in northeastern Asia",

abstract = "The paper presents new data on the isotopic age and chemical composition of volcanic rocks from the Tytyl{\textquoteright}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{\textquoteright}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.",

keywords = "Early Cretaceous, geochemistry, geochronology, post-collisional magmatism, Verkhoyansk–Chukotka Region, western Chukotka",

author = "Tikhomirov, {P. L.} and Prokof{\textquoteright}ev, {V. Yu} and Kal{\textquoteright}ko, {I. A.} and Apletalin, {A. V.} and Nikolaev, {Yu N.} and K. Kobayashi and E. Nakamura",

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T1 - Post-collisional magmatism of western Chukotka and Early Cretaceous tectonic rearrangement in northeastern Asia

AU - Tikhomirov, P. L.

AU - Prokof’ev, V. Yu

AU - Kal’ko, I. A.

AU - Apletalin, A. V.

AU - Nikolaev, Yu N.

AU - Kobayashi, K.

AU - Nakamura, E.

PY - 2017/3/1

Y1 - 2017/3/1

N2 - 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.

AB - 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.

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KW - Verkhoyansk–Chukotka Region

KW - western Chukotka

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Post-collisional magmatism of western Chukotka and Early Cretaceous tectonic rearrangement in northeastern Asia

Abstract

Keywords

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