SHRIMP U-Pb zircon geochronology of granitoids from Dongping area, Hebei Province, China: constraints on tectonic evolution and geodynamic setting for gold metallogeny

	SHRIMP U-Pb zircon geochronology of granitoids from Dongping area, Hebei Province, China: constraints on tectonic evolution and geodynamic setting for gold metallogeny
	Miao, LC ; Qiu, YM ; McNaughton, N ; Luo, ZK ; Groves, D ; Zhai, YS ; Fan, WM ; Zhai, MG ; Guan, K
刊名	ORE GEOLOGY REVIEWS
	2002-04-01
卷号	19 期号:3-4 页码:187-204
关键词	U-Pb geochronology zircon granitoids geodynamic setting gold deposits Dongping
ISSN号	0169-1368
文献子类	Review
英文摘要	The Dongping area in the central part of the northern marginal zone of the North China Craton (NCC) is one of the most important gold-producing areas in China, and has been intruded by a number of alkaline and granitic batholiths or plutons spatially associated with gold deposits. Previous dates on these intrusions yield contradictory data, depending on the isotopic ion. methodology used, and have led to ambiguity in understanding magmatic evolution and gold mineralization of the region Detailed SHRIMP U-Pb zircon geochronology of the alkaline and granitic rocks in the study area now reveals details of its tectono-magmatic history. Zircons from a granitic gneiss hosting the Xiaoyingpan gold deposit yielded concordant ages of ca. 2.5 Ga. This constrains regional metamorphism of the Archaean basement to late Archaean time. A second magmatic event at ca. 1.8 Ga is revealed by xenocrystic/inherited zircons with this age. These two Precambrian events are coeval with those in other parts of the NCC. The largest igneous intrusion in the region, the Shuiquangou syenite-monzonite complex, was emplaced at ca. 390 Ma, as indicated by the magmatic zircon populations of the two samples from the central and eastern parts of the complex. The accretion of a volcanic are onto the northern margin of the NCC is considered as a plausible cause of this alkaline magmatism. The emplacement of the Guzuizi porphyritic granite pluton at 236 +/- 2 Ma represents another major magmatic event in the region, probably a response to postcollisional orogeny following amalgamation of the North China and Angara cratons. Latest magmatism is marked by the emplacement of the Shangshuiquan monzogranite at 142.2 +/- 1.3 Ma, which is most likely related to an underplating event that took place in the Dongping and its adjacent areas at ca. 140 Ma. More importantly, these results suggest that gold mineralization in the area, essentially a single event as indicated by similar deposit characteristics, is broadly coeval with this latest granite magmatism. Hence, this mineralization is about 250 Ma later than the emplacement of the Shuiquangou alkaline complex and, thus, is interpreted to preclude the widely accepted model that suggests gold deposits have genetic relationships with alkaline magmatism. The late timing of gold mineralization with respect to felsic magmatism in the area is similar to those observed in other major gold-producing provinces in the NCC. In all these major gold provinces, we suggest that gold mineralization is coeval with the latest granite magmatic event at about 140-120 Ma. This farther suggests that these mesothermal gold deposits were formed from similar tectono-magmatic environments. (C) 2002 Elsevier Science B.V All rights reserved.
WOS关键词	SINO-KOREAN CRATON ; CHEMICAL-COMPOSITION ; EAST CHINA ; COLLISION ; NORTH ; CRUST ; MODEL ; FAULT
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000176022100003
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/77975]
专题	中国科学院地质与地球物理研究所
通讯作者	Miao, LC
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Tianjin Geol Acad, Tianjin 300061, Peoples R China 3.Univ Western Australia, Dept Geol & Geophys, Key Str Strateg Mineral Deposits, Nedlands, WA 6907, Australia 4.China Univ Geosci, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Miao, LC,Qiu, YM,McNaughton, N,et al. SHRIMP U-Pb zircon geochronology of granitoids from Dongping area, Hebei Province, China: constraints on tectonic evolution and geodynamic setting for gold metallogeny[J]. ORE GEOLOGY REVIEWS,2002,19(3-4):187-204.
APA	Miao, LC.,Qiu, YM.,McNaughton, N.,Luo, ZK.,Groves, D.,...&Guan, K.(2002).SHRIMP U-Pb zircon geochronology of granitoids from Dongping area, Hebei Province, China: constraints on tectonic evolution and geodynamic setting for gold metallogeny.ORE GEOLOGY REVIEWS,19(3-4),187-204.
MLA	Miao, LC,et al."SHRIMP U-Pb zircon geochronology of granitoids from Dongping area, Hebei Province, China: constraints on tectonic evolution and geodynamic setting for gold metallogeny".ORE GEOLOGY REVIEWS 19.3-4(2002):187-204.