First identification of Mid-Miocene north-south trending dikes in the eastern Qiangtang terrane, eastern Tibet: Mantle melting and implications for plateau uplift

Xu, Chuan-Bing, Wang, Jun, Wang, Qiang, Kerr, Andrew C. ORCID: https://orcid.org/0000-0001-5569-4730, Li, Wu-Fu, Liu, Jin-Heng, Wang, Bing-Zhang, Li, Shan-Ping, Wang, Chun-Tao, Wang, Zi-Long and Gong, Lin 2024. First identification of Mid-Miocene north-south trending dikes in the eastern Qiangtang terrane, eastern Tibet: Mantle melting and implications for plateau uplift. Lithos 478-9 , 107620. 10.1016/j.lithos.2024.107620 Item availability restricted.

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Abstract

The uplift of the Tibetan Plateau during the Miocene is crucial to understanding continental deformation processes and global climatic events. However, the eastern Tibetan Plateau remains poorly investigated. Mantle-derived magmatism provides crucial insights into the deep dynamic processes and surface uplift of the plateau. In this paper we report the first discovery of north–south trending lamprophyre dikes from the Aduo Basin in the eastern Qiangtang terrane, eastern Tibet. Our new age data show that these lamprophyre dikes were generated in Mid-Miocene (15–13 Ma). This new discovery has bridged the Mid-Miocene mantle-derived magmatic gap in the Qiangtang terrane. Trace element and Nd–Sr isotopic data indicate that they were derived by partial melting of enriched subcontinental lithospheric mantle. Our study implies that the eastern Tibetan Plateau had its attained near-maximum elevation by the Mid-Miocene. Combined with previous research results, we propose that the entire plateau almost simultaneously reached its near-maximum elevation by the Mid-Miocene.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Earth and Environmental Sciences
Publisher:	Elsevier
ISSN:	0024-4937
Date of First Compliant Deposit:	13 May 2024
Date of Acceptance:	24 April 2024
Last Modified:	10 Nov 2024 04:00
URI:	https://orca.cardiff.ac.uk/id/eprint/168883

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