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

	Ion microprobe zircon U-Pb age and geochemistry of the Myanmar jadeitite
	Shi, Guanghai 1,2; Cui, Wenyuan 3; Cao, Shumin 4; Jiang, Neng 2; Jian, Ping 5; Liu, Dunyi 5; Miao, Laicheng 2; Chu, Bingbing 1
刊名	JOURNAL OF THE GEOLOGICAL SOCIETY
	2008
卷号	165 页码:221-234
ISSN号	0016-7649
文献子类	Article
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.
WOS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
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC PUBL HOUSE
WOS记录号	WOS:000253287800018
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/69956]
专题	中国科学院地质与地球物理研究所
通讯作者	Shi, Guanghai
作者单位	1.China Univ Geosci, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 4.Guangdong Prov Mat Testing Ctr, Guangzhou 510080, Peoples R China 5.Chinese Acad Geol Sci, Inst Geol, SHRIMP Lab, Beijing 100037, Peoples R China
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,2008,165:221-234.
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,165,221-234.
MLA	Shi, Guanghai,et al."Ion microprobe zircon U-Pb age and geochemistry of the Myanmar jadeitite".JOURNAL OF THE GEOLOGICAL SOCIETY 165(2008):221-234.