A huge oceanic-type UHP metamorphic belt in southwestern Tianshan,   China: Peak metamorphic age and P-T path

doi:10.1007/s11434-013-6074-x

CORC > 北京大学 > 地球与空间科学学院

	A huge oceanic-type UHP metamorphic belt in southwestern Tianshan, China: Peak metamorphic age and P-T path
	Zhang LiFei ; Du JinXue ; Lu Zeng ; Yang Xin ; Gou LongLong ; Xia Bin ; Chen ZhenYu ; Wei ChunJing ; Song ShuGuang
刊名	科学通报英文版
	2013
关键词	oceanic UHP metamorphic belt coesite peak metamorphic age P-T path southwestern Tianshan China ULTRAHIGH-PRESSURE METAMORPHISM COESITE-BEARING ECLOGITE WESTERN TIANSHAN NW-CHINA TECTONIC IMPLICATIONS PHASE-EQUILIBRIA MUZHAERTE RIVER ROCKS PETROLOGY SUBDUCTION
DOI	10.1007/s11434-013-6074-x
英文摘要	Recent progress in the study of the UHP metamorphic belt in southwestern Tianshan, China, is summarized in this paper. This about 80-km-long and over 10-km-wide UHP belt has been recognized by the discovery of coesite, coesite pseudomorphs and other UHP minerals. It is the largest oceanic-type UHP metamorphic belt reported so far. It has formed due to northward subduction of the Tianshan Paleo-Ocean. U-Pb dating of metamorphic rims of zircons from a coesite-bearing garnet-phengite schist yields a peak UHP metamorphic ages of 320 +/- 3.7 Ma. Combined with ages of 233-226 Ma obtained from rims of zircons from retrograded eclogites, a long retrograde metamorphic evolution (> 70 Ma) has been revealed. According to phase equilibria modeling, the P-T paths of both coesite-bearing eclogites and garnet-phengite schists are characterized by thermal relaxation, i.e., the metamorphic temperature peak lags behind the pressure peak, indicating that the UHP rocks experienced slow and long heating and decompression during exhumation in the subduction channel. On the basis of the field observation that a small amount of eclogite lenses is wrapped in large volumes of metapelites, and the similar P-T paths of both rock types, we propose that the exhumation of the UHP eclogites from southwestern Tianshan, China, may have resulted from the exhumation of large volumes of low-density metapelites, which carried the denser eclogites to the Earth's surface.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000326943300007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Multidisciplinary Sciences; SCI(E); 19; ARTICLE; 35; 4378-4383; 58
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/155590]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Zhang LiFei,Du JinXue,Lu Zeng,et al. A huge oceanic-type UHP metamorphic belt in southwestern Tianshan, China: Peak metamorphic age and P-T path[J]. 科学通报英文版,2013.
APA	Zhang LiFei.,Du JinXue.,Lu Zeng.,Yang Xin.,Gou LongLong.,...&Song ShuGuang.(2013).A huge oceanic-type UHP metamorphic belt in southwestern Tianshan, China: Peak metamorphic age and P-T path.科学通报英文版.
MLA	Zhang LiFei,et al."A huge oceanic-type UHP metamorphic belt in southwestern Tianshan, China: Peak metamorphic age and P-T path".科学通报英文版 (2013).