Tectonostratigraphy of the Jurassic accretionary prisms in the Sikhote-Alin region of Russian Far East

Abstract We propose a scheme to subdivide the Samarka terrane, a Jurassic accretionary prism fragment, into tectonostratigraphic complexes. This subdivision provides a basis to study these formations and map them on a medium- to large-scale. Each complex corresponds to a certain stage in the accreti...

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Autores principales:	Vladimir V. Golozubov, Ludmila F. Simanenko
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/95b5837e5ba0404b84f3c2aceaa7bc03
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spelling	oai:doaj.org-article:95b5837e5ba0404b84f3c2aceaa7bc032021-12-02T17:37:23ZTectonostratigraphy of the Jurassic accretionary prisms in the Sikhote-Alin region of Russian Far East10.1038/s41598-021-98748-52045-2322https://doaj.org/article/95b5837e5ba0404b84f3c2aceaa7bc032021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98748-5https://doaj.org/toc/2045-2322Abstract We propose a scheme to subdivide the Samarka terrane, a Jurassic accretionary prism fragment, into tectonostratigraphic complexes. This subdivision provides a basis to study these formations and map them on a medium- to large-scale. Each complex corresponds to a certain stage in the accretionary prism formation. Thus, the complexes composed of subduction mélange and olistostromes (in our case, Ust-Zhuravlevka and Sebuchar complexes), can be correlated to episodes when the underthrusting of seamounts hampered subduction, as evidenced by seamount fragments contained in the complexes. Episodes of relatively quiet subduction have also been identified, resulting in complexes composed mainly of normally bedded terrigenous and biogenic formations (Tudovaka and Udeka and, partially, Ariadnoe complexes). Particularly considered is the Okrainka-Sergeevka allochthonous complex – a fragment of continental plate overhanging a subduction zone. It was included in the accretionary prism during gravitational sliding on the internal slope of the paleotrench. All volcanic rocks in the accretionary prism are allochthonous fragments of the accreted oceanic crust. The absence of the Jurassic-Berriasian volcanic belt related to this prism, as well as synchronous autochthonous volcanism, indicates that the Samarka terrane accretionary prism formed under conditions of flat-slab subduction, similar to modern examples along the Andean margin.Vladimir V. GolozubovLudmila F. SimanenkoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Vladimir V. Golozubov Ludmila F. Simanenko Tectonostratigraphy of the Jurassic accretionary prisms in the Sikhote-Alin region of Russian Far East
description	Abstract We propose a scheme to subdivide the Samarka terrane, a Jurassic accretionary prism fragment, into tectonostratigraphic complexes. This subdivision provides a basis to study these formations and map them on a medium- to large-scale. Each complex corresponds to a certain stage in the accretionary prism formation. Thus, the complexes composed of subduction mélange and olistostromes (in our case, Ust-Zhuravlevka and Sebuchar complexes), can be correlated to episodes when the underthrusting of seamounts hampered subduction, as evidenced by seamount fragments contained in the complexes. Episodes of relatively quiet subduction have also been identified, resulting in complexes composed mainly of normally bedded terrigenous and biogenic formations (Tudovaka and Udeka and, partially, Ariadnoe complexes). Particularly considered is the Okrainka-Sergeevka allochthonous complex – a fragment of continental plate overhanging a subduction zone. It was included in the accretionary prism during gravitational sliding on the internal slope of the paleotrench. All volcanic rocks in the accretionary prism are allochthonous fragments of the accreted oceanic crust. The absence of the Jurassic-Berriasian volcanic belt related to this prism, as well as synchronous autochthonous volcanism, indicates that the Samarka terrane accretionary prism formed under conditions of flat-slab subduction, similar to modern examples along the Andean margin.
format	article
author	Vladimir V. Golozubov Ludmila F. Simanenko
author_facet	Vladimir V. Golozubov Ludmila F. Simanenko
author_sort	Vladimir V. Golozubov
title	Tectonostratigraphy of the Jurassic accretionary prisms in the Sikhote-Alin region of Russian Far East
title_short	Tectonostratigraphy of the Jurassic accretionary prisms in the Sikhote-Alin region of Russian Far East
title_full	Tectonostratigraphy of the Jurassic accretionary prisms in the Sikhote-Alin region of Russian Far East
title_fullStr	Tectonostratigraphy of the Jurassic accretionary prisms in the Sikhote-Alin region of Russian Far East
title_full_unstemmed	Tectonostratigraphy of the Jurassic accretionary prisms in the Sikhote-Alin region of Russian Far East
title_sort	tectonostratigraphy of the jurassic accretionary prisms in the sikhote-alin region of russian far east
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/95b5837e5ba0404b84f3c2aceaa7bc03
work_keys_str_mv	AT vladimirvgolozubov tectonostratigraphyofthejurassicaccretionaryprismsinthesikhotealinregionofrussianfareast AT ludmilafsimanenko tectonostratigraphyofthejurassicaccretionaryprismsinthesikhotealinregionofrussianfareast
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Tectonostratigraphy of the Jurassic accretionary prisms in the Sikhote-Alin region of Russian Far East

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