Ion microprobe zircon U-Pb age and geochemistry of the Myanmar jadeitite

doi:10.1144/0016-76492006-119

CORC > 北京大学 > 地球与空间科学学院

	Ion microprobe zircon U-Pb age and geochemistry of the Myanmar jadeitite
	Shi, Guanghai ; Cui, Wenyuan ; Cao, Shumin ; Jiang, Neng ; Jian, Ping ; Liu, Dunyi ; Miao, Laicheng ; Chu, Bingbing
刊名	journal of the geological society
	2008
关键词	ITOIGAWA-OHMI DISTRICT MOTAGUA FAULT ZONE EASTERN HIMALAYAN SYNTAXIS INDIA-EURASIA COLLISION MID-ATLANTIC RIDGE METAMORPHIC BELT SERPENTINITE MELANGE NORTHWESTERN MYANMAR SURROUNDING REGIONS SOUTHWESTERN JAPAN
DOI	10.1144/0016-76492006-119
英文摘要	Combined geochemistry and geochronology of the Myanmar jadeitite were determined. Bulk-rock trace element compositions display U-shaped REE patterns with pronounced positive Eu anomalies. The total REE abundances are very low, less than half chondritic, and the high field strength elements and some large ion lithophile elements are moderately enriched. These features indicate a metasomatic origin. There are three groups of zircons with different interior characteristics, cathodoluminescence, mineral inclusions, chemical compositions and sensitive high-resolution ion microprobe U-Pb ages. Group-I zircons, with a mean age of 163.2 +/- 3.3 Ma, mostly have distinct oscillatory zoning, highest U and Th contents, and Na-free, Mg-rich mineral inclusions, and thus indicate an igneous (formation of oceanic crust) or hydrothermal (serpentinization and/or rodingitization) event in the Middle Jurassic. Group-II zircons, with a mean age of 146.5 +/- 3.4 Ma, have bright luminescence without oscillatory zoning and include jadeite and jadeitic pyroxene inclusions, suggesting that formation of the Myanmar jadeitites, as well as subduction of the eastern Indian oceanic plate, occurred in the Late Jurassic. Group-III zircons have an age of 122.2 +/- 4.8 Ma, which represents a later unknown thermal event. Discovery of the Middle Jurassic zircons provides geochronological constraint on the tectonic evolution of the eastern Indo-Burman Range.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000253287800018&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Geosciences, Multidisciplinary; SCI(E); 52; ARTICLE; 221-234; 165
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/397533]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Shi, Guanghai,Cui, Wenyuan,Cao, Shumin,et al. Ion microprobe zircon U-Pb age and geochemistry of the Myanmar jadeitite[J]. journal of the geological society,2008.
APA	Shi, Guanghai.,Cui, Wenyuan.,Cao, Shumin.,Jiang, Neng.,Jian, Ping.,...&Chu, Bingbing.(2008).Ion microprobe zircon U-Pb age and geochemistry of the Myanmar jadeitite.journal of the geological society.
MLA	Shi, Guanghai,et al."Ion microprobe zircon U-Pb age and geochemistry of the Myanmar jadeitite".journal of the geological society (2008).