Microcontinent subduction and S-type volcanism prior to India–Asia collision

Abstract Continental crust has long been considered too buoyant to be subducted beneath another continent, although geophysical evidence in collision zones predict continental crust subduction. This is particularly significant where upper continental crust is detached allowing the lower continental...

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Autores principales:	Zongyao Yang, Juxing Tang, M. Santosh, Xiaoyan Zhao, Xinghai Lang, Ying Wang, Shuai Ding, Fengqin Ran
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8b9113dd092c4010bb0b3df877d982d8
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spelling	oai:doaj.org-article:8b9113dd092c4010bb0b3df877d982d82021-12-02T16:26:38ZMicrocontinent subduction and S-type volcanism prior to India–Asia collision10.1038/s41598-021-94492-y2045-2322https://doaj.org/article/8b9113dd092c4010bb0b3df877d982d82021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94492-yhttps://doaj.org/toc/2045-2322Abstract Continental crust has long been considered too buoyant to be subducted beneath another continent, although geophysical evidence in collision zones predict continental crust subduction. This is particularly significant where upper continental crust is detached allowing the lower continental crust to subduct, albeit the mechanism of such subduction and recycling of the upper continental crust remain poorly understood. Here, we investigate Paleocene S-type magmatic and volcanic rocks from the Linzizong volcanic succession in the southern Lhasa block of Tibet. These rocks exhibit highly enriched 87Sr/86Sr, 207Pb/206Pb and 208Pb/206Pb together with depleted 143Nd/144Nd isotope ratios. The geochemical and isotopic features of these rocks are consistent with those of modern upper continental crust. We conclude that these Paleocene S-type volcanic and magmatic rocks originated from the melting of the upper continental crust from microcontinent subduction during the late stage of India–Asia convergence.Zongyao YangJuxing TangM. SantoshXiaoyan ZhaoXinghai LangYing WangShuai DingFengqin RanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Zongyao Yang Juxing Tang M. Santosh Xiaoyan Zhao Xinghai Lang Ying Wang Shuai Ding Fengqin Ran Microcontinent subduction and S-type volcanism prior to India–Asia collision
description	Abstract Continental crust has long been considered too buoyant to be subducted beneath another continent, although geophysical evidence in collision zones predict continental crust subduction. This is particularly significant where upper continental crust is detached allowing the lower continental crust to subduct, albeit the mechanism of such subduction and recycling of the upper continental crust remain poorly understood. Here, we investigate Paleocene S-type magmatic and volcanic rocks from the Linzizong volcanic succession in the southern Lhasa block of Tibet. These rocks exhibit highly enriched 87Sr/86Sr, 207Pb/206Pb and 208Pb/206Pb together with depleted 143Nd/144Nd isotope ratios. The geochemical and isotopic features of these rocks are consistent with those of modern upper continental crust. We conclude that these Paleocene S-type volcanic and magmatic rocks originated from the melting of the upper continental crust from microcontinent subduction during the late stage of India–Asia convergence.
format	article
author	Zongyao Yang Juxing Tang M. Santosh Xiaoyan Zhao Xinghai Lang Ying Wang Shuai Ding Fengqin Ran
author_facet	Zongyao Yang Juxing Tang M. Santosh Xiaoyan Zhao Xinghai Lang Ying Wang Shuai Ding Fengqin Ran
author_sort	Zongyao Yang
title	Microcontinent subduction and S-type volcanism prior to India–Asia collision
title_short	Microcontinent subduction and S-type volcanism prior to India–Asia collision
title_full	Microcontinent subduction and S-type volcanism prior to India–Asia collision
title_fullStr	Microcontinent subduction and S-type volcanism prior to India–Asia collision
title_full_unstemmed	Microcontinent subduction and S-type volcanism prior to India–Asia collision
title_sort	microcontinent subduction and s-type volcanism prior to india–asia collision
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8b9113dd092c4010bb0b3df877d982d8
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_version_	1718384002903048192

Microcontinent subduction and S-type volcanism prior to India–Asia collision

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