Discovery of Early Paleozoic eclogite from the East Kunlun, Western;China and its tectonic significance

doi:10.1016/j.gr.2012.06.007

	Discovery of Early Paleozoic eclogite from the East Kunlun, Western;China and its tectonic significance
	Meng, Fancong 2; Zhang, Jianxin ; Cui, Meihui
刊名	GONDWANA RESEARCH
	2013
卷号	23 期号:2;SI SI 页码:825-836
关键词	Eclogite Geochronology Early Paleozoic HP metamorphism East Kunlun
ISSN号	1342-937X
DOI	10.1016/j.gr.2012.06.007
英文摘要	Eclogites discovered in the eastern part of the East Kunlun Mountains, Western China, are primarily composed of garnet + omphacite + quartz + rutile. The garnets show end-member components of 48-55% almandine, 1-2% spessartine, 19-29% grossularite and 16-29% pyrope, and the omphacite has a jadeite content of 21-63%. The peak-metamorphic assemblage of eclogites records a P-T condition of >1.6 GPa and 590 degrees C-650 degrees C. Zircon U-Pb dating of the inherited magmatic zircons from fine-grained eclogite reveals a Neoproterozoic age of 934 Ma, representing the protolith age of the eclogite. Zircons from the coarse-grained eclogite contain inclusions of garnet, omphacite and rutile, and yield a weighted mean age of 428 Ma, indicating the metamorphic age of eclogite. The eclogites, together with the Late Cambrian (508 Ma) high-pressure granulite to the west, constitute an Early Paleozoic high-pressure metamorphic belt in the East Kunlun. (C) 2012 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
学科主题	变质岩岩石学
WOS关键词	ULTRAHIGH-PRESSURE METAMORPHISM ; QAIDAM HP/UHP TERRANE ; U-PB ; GEOCHRONOLOGY ; NORTH QILIAN MOUNTAINS ; QINGHAI-TIBET PLATEAU ; CENTRAL ; OROGENIC BELT ; SULU UHP TERRANE ; NW CHINA ; ALTYN TAGH ; SM-ND
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000315078500028
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40072]
专题	中国地质科学院地质研究所
作者单位	1.CAGS, Inst Geol, State Key Lab Continental Tecton & Dynam, Beijing 100037, Peoples R China. 2.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Meng, Fancong,Zhang, Jianxin,Cui, Meihui. Discovery of Early Paleozoic eclogite from the East Kunlun, Western;China and its tectonic significance[J]. GONDWANA RESEARCH,2013,23(2;SI SI):825-836.
APA	Meng, Fancong,Zhang, Jianxin,&Cui, Meihui.(2013).Discovery of Early Paleozoic eclogite from the East Kunlun, Western;China and its tectonic significance.GONDWANA RESEARCH,23(2;SI SI),825-836.
MLA	Meng, Fancong,et al."Discovery of Early Paleozoic eclogite from the East Kunlun, Western;China and its tectonic significance".GONDWANA RESEARCH 23.2;SI SI(2013):825-836.