U-PbSHRIMP ages recorded in the coesite-bearing zircon domains of;paragneisses in the southwestern Sulu terrane, eastern China: New;interpretation

doi:10.2138/am.2005.1677

	U-PbSHRIMP ages recorded in the coesite-bearing zircon domains of;paragneisses in the southwestern Sulu terrane, eastern China: New;interpretation
	Liu, FL 3; Liou, JG ; Xu, ZQ
刊名	AMERICAN MINERALOGIST
	2005
卷号	90 期号:5-6 页码:790-800
ISSN号	0003-004X
DOI	10.2138/am.2005.1677
英文摘要	Laser Raman spectroscopy and cathodoluminescence (CL) images reveal that abundant and complicated mineral inclusions occur in zoned zircon separates from paragneisses in drill holes CCSDPP2, ZK-2304, and CCSD-MH, at Donghai, southwestern Sulu terrane, China. Many low-P mineral inclusions are preserved in inherited zircon cores. Coesite + quartz within a single inclusion, and some low-P minerals (e.g, quartz and albite) are identified in zircon mantles. Textures showing the quartz to coesite transformation in zircon indicate that both core and mantle of the zircon are detrital. Inclusions of coesite, together with garnet, jadeite, and phengite, are common in zircon rims formed during ultrahigh-pressure (UHP) metamorphism. SHRIMP U-Pb analyses of these zoned zircon grains identify three discrete and meaningful age groups. Proterozoic ages of 840 to 658 Ma for zircon cores indicate that the detrital zircons have a variety of sources. An early Paleozoic group of 505 to 455 Ma ages for zircon mantles constrain neither the timing of a discrete UHP metamorphic event, nor the transformation age from quartz to coesite. The 227 9 Ma (the weighted mean age) obtained from coesite-bearing zircon rims represents the UHP metamorphic age. Thus, one Late Triassic UHP metamorphic event, rather than two UHP metamorphic events, is well established in Sulu UHP terrane by the method of U-Pb SHRIMP dating for coesite-bearing zircon rims in garnet-biotite-amphibole-albite gneisses.
学科主题	变质岩岩石学
WOS关键词	ULTRAHIGH-PRESSURE METAMORPHISM ; CALEDONIAN XIONGDIAN ECLOGITE ; WESTERN ; DABIE MOUNTAINS ; MINERAL INCLUSIONS ; JIANGSU-PROVINCE ; YANGTZE CRATONS ; PB AGES ; ROCKS ; SHRIMP ; SHAN
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	MINERALOGICAL SOC AMER
WOS记录号	WOS:000229305300003
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/37947]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China. 2.Stanford Univ, Dept Geog & Environm Sci, Stanford, CA 94305 USA. 3.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Liu, FL,Liou, JG,Xu, ZQ. U-PbSHRIMP ages recorded in the coesite-bearing zircon domains of;paragneisses in the southwestern Sulu terrane, eastern China: New;interpretation[J]. AMERICAN MINERALOGIST,2005,90(5-6):790-800.
APA	Liu, FL,Liou, JG,&Xu, ZQ.(2005).U-PbSHRIMP ages recorded in the coesite-bearing zircon domains of;paragneisses in the southwestern Sulu terrane, eastern China: New;interpretation.AMERICAN MINERALOGIST,90(5-6),790-800.
MLA	Liu, FL,et al."U-PbSHRIMP ages recorded in the coesite-bearing zircon domains of;paragneisses in the southwestern Sulu terrane, eastern China: New;interpretation".AMERICAN MINERALOGIST 90.5-6(2005):790-800.