TIMING AND MECHANISM OF FORMATION AND EXHUMATION OF THE NORTHERN QAIDAM ULTRAHIGH-PRESSURE METAMORPHIC BELT

Zhiqin X.; Jingsui Y.; Cailai W.; Haibing L.; Jianxin Z.; Xuexiang Q.; Shuguang S.; Haijun Q.

dc.contributor.author	Zhiqin X.
dc.contributor.author	Jingsui Y.
dc.contributor.author	Cailai W.
dc.contributor.author	Haibing L.
dc.contributor.author	Jianxin Z.
dc.contributor.author	Xuexiang Q.
dc.contributor.author	Shuguang S.
dc.contributor.author	Haijun Q.
dc.date.accessioned	2025-02-16T08:50:47Z
dc.date.available	2025-02-16T08:50:47Z
dc.date.issued	2006
dc.identifier	https://www.elibrary.ru/item.asp?id=28047298
dc.identifier.citation	Journal of Asian Earth Sciences, 2006, 28, 2-3, 160-173
dc.identifier.issn	1367-9120
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/48059
dc.description.abstract	The Qilian Caledonian orogenic belt on the north margin of the Qinghai-Tibet Plateau were formed by convergence and collision of the Alxa terrain, Qilian terrain and Qaidam terrain. The 350-km-long, WNW-ESE-trending North Qaidam ultrahigh-pressure (UHP) metamorphic belt, lying between the Qilian and Qaidam terrains, was formed between 495 and 440 Ma by deep subduction of the South Qilian Sea and the Qaidam continental crust beneath the Qilian terrain. The UHP belt was exhumed by a process of 'oblique extrusion' during transformation from 'normal' to 'oblique' intracontinental subduction between the Qilian and Qaidam terrains. Exhumation began at 470-460 Ma and was completed by 406-400 Ma. Exhumation structures are well-preserved in the UHP rocks and record extensive retrograde metamorphism. © 2006 Elsevier Ltd. All rights reserved.
dc.subject	EXHUMATION
dc.subject	MECHANISM
dc.subject	NORTHERN QUAIDAM
dc.subject	UHP METAMORPHIC BELT
dc.title	TIMING AND MECHANISM OF FORMATION AND EXHUMATION OF THE NORTHERN QAIDAM ULTRAHIGH-PRESSURE METAMORPHIC BELT
dc.type	Статья
dc.identifier.doi	10.1016/j.jseaes.2005.09.016