Early-middle Triassic basic magmatism and metamorphism of ultramafic-mafic complexes of the Ust’-Belaya terrane (central Chukotka, NE Russia): 40 Ar/ 39 Ar ages, petrological and geochemical data, geodynamic interpretations
The Ust’-Belaya terrane (Chukotka, NE Russia), belonging to the West Koryak fold belt, is made of mantle and crustal ultramafic-mafic complexes which originated during several discrete episodes of magmatic activity in the Neoproterozoic, the late Neoproterozoic-Cambrian and the early-middle Triassic...
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Taylor & Francis
2018
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Online Access: | https://dx.doi.org/10.6084/m9.figshare.6740909.v1 https://tandf.figshare.com/articles/Early-middle_Triassic_basic_magmatism_and_metamorphism_of_ultramafic-mafic_complexes_of_the_Ust_-Belaya_terrane_central_Chukotka_NE_Russia_sup_40_sup_Ar_sup_39_sup_Ar_ages_petrological_and_geochemical_data_geodynamic_interpretations/6740909/1 |
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ftdatacite:10.6084/m9.figshare.6740909.v1 2023-05-15T15:54:49+02:00 Early-middle Triassic basic magmatism and metamorphism of ultramafic-mafic complexes of the Ust’-Belaya terrane (central Chukotka, NE Russia): 40 Ar/ 39 Ar ages, petrological and geochemical data, geodynamic interpretations Ledneva, Galina V. Layer, Paul W. Bazylev, Boris A. Sokolov, Sergey D. Kuzmin, Dmitry Kononkova, Natalia N. Ishiwatari, Akira 2018 https://dx.doi.org/10.6084/m9.figshare.6740909.v1 https://tandf.figshare.com/articles/Early-middle_Triassic_basic_magmatism_and_metamorphism_of_ultramafic-mafic_complexes_of_the_Ust_-Belaya_terrane_central_Chukotka_NE_Russia_sup_40_sup_Ar_sup_39_sup_Ar_ages_petrological_and_geochemical_data_geodynamic_interpretations/6740909/1 unknown Taylor & Francis https://dx.doi.org/10.1080/00206814.2018.1491013 https://dx.doi.org/10.6084/m9.figshare.6740909 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 69999 Biological Sciences not elsewhere classified FOS Biological sciences Developmental Biology dataset Dataset 2018 ftdatacite https://doi.org/10.6084/m9.figshare.6740909.v1 https://doi.org/10.1080/00206814.2018.1491013 https://doi.org/10.6084/m9.figshare.6740909 2021-11-05T12:55:41Z The Ust’-Belaya terrane (Chukotka, NE Russia), belonging to the West Koryak fold belt, is made of mantle and crustal ultramafic-mafic complexes which originated during several discrete episodes of magmatic activity in the Neoproterozoic, the late Neoproterozoic-Cambrian and the early-middle Triassic and accreted to the Asian continental margin in the early Cretaceous. This paper focuses on the latest magmatic episode expressed in intrusion of microgabbro dikes and nearly coeval metamorphism superimposed on both ancient complexes and the dikes. We present original 40 Ar/ 39 Ar ages, mineral and bulk-rock chemistry of the microgabbro dikes, metamorphosed dike and vein cutting ultramafic-mafic complexes. Dike microgabbros resemble differentiated arc-tholeiitic magmas originated in a subduction setting. Differentiated magmas intruded into much older spinel peridotites and dunites located at mid-crustal levels. Intrusion and crystallization of these magmas was followed by down-going movement of spinel peridotites and rocks of the mantle-crust transition zone towards a mantle wedge where they were metamorphosed at high-P conditions. This metamorphism resulted in transformation of microgabbro to garnet amphibolite, diorite to albite-zoisite-paragonite-pargasite rock and spinel peridotites to metaperidotites. P-T parameters of this metamorphism reconstructed based on mineral assemblage of garnet amphibolite correspond to those of epidote amphibolite – amphibolite – amphibole eclogite facies transition. The peculiar zoisite (clinozoisite)-paragonite mineral assemblage typical of metamorphosed vein rock indicates high-P metamorphic conditions of epidote-amphibolite facies. Dataset Chukotka Koryak DataCite Metadata Store (German National Library of Science and Technology) Ust’-Belaya ENVELOPE(173.282,173.282,65.506,65.506) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 69999 Biological Sciences not elsewhere classified FOS Biological sciences Developmental Biology |
spellingShingle |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 69999 Biological Sciences not elsewhere classified FOS Biological sciences Developmental Biology Ledneva, Galina V. Layer, Paul W. Bazylev, Boris A. Sokolov, Sergey D. Kuzmin, Dmitry Kononkova, Natalia N. Ishiwatari, Akira Early-middle Triassic basic magmatism and metamorphism of ultramafic-mafic complexes of the Ust’-Belaya terrane (central Chukotka, NE Russia): 40 Ar/ 39 Ar ages, petrological and geochemical data, geodynamic interpretations |
topic_facet |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 69999 Biological Sciences not elsewhere classified FOS Biological sciences Developmental Biology |
description |
The Ust’-Belaya terrane (Chukotka, NE Russia), belonging to the West Koryak fold belt, is made of mantle and crustal ultramafic-mafic complexes which originated during several discrete episodes of magmatic activity in the Neoproterozoic, the late Neoproterozoic-Cambrian and the early-middle Triassic and accreted to the Asian continental margin in the early Cretaceous. This paper focuses on the latest magmatic episode expressed in intrusion of microgabbro dikes and nearly coeval metamorphism superimposed on both ancient complexes and the dikes. We present original 40 Ar/ 39 Ar ages, mineral and bulk-rock chemistry of the microgabbro dikes, metamorphosed dike and vein cutting ultramafic-mafic complexes. Dike microgabbros resemble differentiated arc-tholeiitic magmas originated in a subduction setting. Differentiated magmas intruded into much older spinel peridotites and dunites located at mid-crustal levels. Intrusion and crystallization of these magmas was followed by down-going movement of spinel peridotites and rocks of the mantle-crust transition zone towards a mantle wedge where they were metamorphosed at high-P conditions. This metamorphism resulted in transformation of microgabbro to garnet amphibolite, diorite to albite-zoisite-paragonite-pargasite rock and spinel peridotites to metaperidotites. P-T parameters of this metamorphism reconstructed based on mineral assemblage of garnet amphibolite correspond to those of epidote amphibolite – amphibolite – amphibole eclogite facies transition. The peculiar zoisite (clinozoisite)-paragonite mineral assemblage typical of metamorphosed vein rock indicates high-P metamorphic conditions of epidote-amphibolite facies. |
format |
Dataset |
author |
Ledneva, Galina V. Layer, Paul W. Bazylev, Boris A. Sokolov, Sergey D. Kuzmin, Dmitry Kononkova, Natalia N. Ishiwatari, Akira |
author_facet |
Ledneva, Galina V. Layer, Paul W. Bazylev, Boris A. Sokolov, Sergey D. Kuzmin, Dmitry Kononkova, Natalia N. Ishiwatari, Akira |
author_sort |
Ledneva, Galina V. |
title |
Early-middle Triassic basic magmatism and metamorphism of ultramafic-mafic complexes of the Ust’-Belaya terrane (central Chukotka, NE Russia): 40 Ar/ 39 Ar ages, petrological and geochemical data, geodynamic interpretations |
title_short |
Early-middle Triassic basic magmatism and metamorphism of ultramafic-mafic complexes of the Ust’-Belaya terrane (central Chukotka, NE Russia): 40 Ar/ 39 Ar ages, petrological and geochemical data, geodynamic interpretations |
title_full |
Early-middle Triassic basic magmatism and metamorphism of ultramafic-mafic complexes of the Ust’-Belaya terrane (central Chukotka, NE Russia): 40 Ar/ 39 Ar ages, petrological and geochemical data, geodynamic interpretations |
title_fullStr |
Early-middle Triassic basic magmatism and metamorphism of ultramafic-mafic complexes of the Ust’-Belaya terrane (central Chukotka, NE Russia): 40 Ar/ 39 Ar ages, petrological and geochemical data, geodynamic interpretations |
title_full_unstemmed |
Early-middle Triassic basic magmatism and metamorphism of ultramafic-mafic complexes of the Ust’-Belaya terrane (central Chukotka, NE Russia): 40 Ar/ 39 Ar ages, petrological and geochemical data, geodynamic interpretations |
title_sort |
early-middle triassic basic magmatism and metamorphism of ultramafic-mafic complexes of the ust’-belaya terrane (central chukotka, ne russia): 40 ar/ 39 ar ages, petrological and geochemical data, geodynamic interpretations |
publisher |
Taylor & Francis |
publishDate |
2018 |
url |
https://dx.doi.org/10.6084/m9.figshare.6740909.v1 https://tandf.figshare.com/articles/Early-middle_Triassic_basic_magmatism_and_metamorphism_of_ultramafic-mafic_complexes_of_the_Ust_-Belaya_terrane_central_Chukotka_NE_Russia_sup_40_sup_Ar_sup_39_sup_Ar_ages_petrological_and_geochemical_data_geodynamic_interpretations/6740909/1 |
long_lat |
ENVELOPE(173.282,173.282,65.506,65.506) |
geographic |
Ust’-Belaya |
geographic_facet |
Ust’-Belaya |
genre |
Chukotka Koryak |
genre_facet |
Chukotka Koryak |
op_relation |
https://dx.doi.org/10.1080/00206814.2018.1491013 https://dx.doi.org/10.6084/m9.figshare.6740909 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.6740909.v1 https://doi.org/10.1080/00206814.2018.1491013 https://doi.org/10.6084/m9.figshare.6740909 |
_version_ |
1766390055242301440 |