Early Paleozoic magmatism and gold mineralization in the northern Altun,;NW China

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质科学院地质力学研究所

	Early Paleozoic magmatism and gold mineralization in the northern Altun,;NW China
	Chen, XH 5; Wang, XF ; Gehrels, G ; Yang, Y ; Qin, H ; Chen, ZL ; Yang, F ; Chen, BL ; Li, XZ
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2004
卷号	78 期号:2 页码:515-523
关键词	granite zircon U-Pb chronology gold deposit Rb-Sr chronology exhumation Ar-40-Ar-39 dating and MDD modeling northern Altun
ISSN号	1000-9515
英文摘要	This paper discusses the relationships between granitic magmatism and gold mineralization and the exhumation history of the Dapinggou gold deposit in northern Altun, NW China based on the geochronological data, including zircon U-Pb ages, Rb-Sr isochron age and Ar-40-Ar-39 dating and MDD modeling data. The main granitic magmatism age in this area is attained from the ID TIMS U-Pb geochronology of zircons from the Kuoshibulak granite, the biggest granite in the northern Altun area, which gives a concordant age of 443+/-5 Main the Late Ordovician. Zircon ID TIMS U-Pb geochronology of the West Dapinggou biotite granite west of the Dapinggou gold deposit gives concordant ages around 485+/-10 Ma, representing the early stage of Ordovician magmatism. The Rb-Sr isochron age (487+/-21 Ma) of 6 quartz inclusion samples from quartz veins in this gold deposit is very close to that of the West Dapinggou granite. MDD modeling of step heating Ar-40-Ar-39 data of K-feldspar from the same West Dapinggou biotite granite gives a rapid cooling history from 300degreesC to 150degreesC during 200-185 Ma. According to the age data and the geological setting of this area, we conclude that the Dapinggou gold deposit was formed at the early stage of the Early Paleozoic granitic magmatism in northern Altun, and exhumed in the Early Jurassic due to the normal faulting of the Lapeiquan detachment. The Early Paleozoic magmatism may provide heat source and produce geological fluids, which are very important for gold mineralization. Exhumation in the Mesozoic caused the uplift of the deposit towards the ground surface.
学科主题	矿床地质
WOS关键词	ALTYN-TAGH ; SYSTEMATIC ANALYSIS ; MOUNTAINS ; EVOLUTION ; FAULT
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC CHINA
WOS记录号	WOS:000222640600026
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/37861]
专题	中国地质科学院地质力学研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China. 2.Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA. 3.Xinjiang Geol Survey, Urumqi, Xinjiang, Peoples R China. 4.China Univ Geosci, Geol Lab Ctr, Beijing 100083, Peoples R China. 5.中国地质科学院地质力学研究所
推荐引用方式 GB/T 7714	Chen, XH,Wang, XF,Gehrels, G,et al. Early Paleozoic magmatism and gold mineralization in the northern Altun,;NW China[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2004,78(2):515-523.
APA	Chen, XH.,Wang, XF.,Gehrels, G.,Yang, Y.,Qin, H.,...&Li, XZ.(2004).Early Paleozoic magmatism and gold mineralization in the northern Altun,;NW China.ACTA GEOLOGICA SINICA-ENGLISH EDITION,78(2),515-523.
MLA	Chen, XH,et al."Early Paleozoic magmatism and gold mineralization in the northern Altun,;NW China".ACTA GEOLOGICA SINICA-ENGLISH EDITION 78.2(2004):515-523.