Relationship between intrusive rocks and gold mineralization of the Anjiayingzi gold deposit, Inner Mongolia and its implications for geodynamics

	Relationship between intrusive rocks and gold mineralization of the Anjiayingzi gold deposit, Inner Mongolia and its implications for geodynamics
	Li, YG ; Zhai, MG ; Miao, LC ; Zhu, JW ; Xue, LW
刊名	ACTA PETROLOGICA SINICA
	2003-10-01
卷号	19 期号:4 页码:808-816
关键词	gold deposit intrusive rocks geodynamics Inner Mongolia Anjiayingzi
ISSN号	1000-0569
文献子类	Article
英文摘要	The Anjiayingzi gold mine, an intermediate-size deposit located in the Chifeng-Chaoyang gold-concentrated area in the north margin of the North China craton, is hosted in the Anjiayingzi granite, and is spatially associated with rhyolitic porphyry. The granite is geochemically characterized by rich-LREE, depleted-HREE, relative high initial Sr-87/Sr-86 ratio, and high Ba and Sr contents, indicative of a deep-source of the granite magma. These geochemical features are consistent with those of the granitoids that are closely related to gold mineralization in eastern Shandong Province, whereas are contrast to those of early-formed Kalaqin granite and post-gold mineralization rhyolite dikes. Zircon U-Pb dates suggest that the Anjiayingzi granite was formed at 132similar to138 Ma, and the rhyolite dike that cut gold lodes was formed at 125similar to127 Ma. Therefore, gold mineralization in the area is constrained at 126similar to132 Ma. This timing of gold mineralization is coeval with the Mesozoic geodynamic regime reverse of the North China Craton. Researches suggest that the geodynamic reverse in the North China Craton took place during early Mesozoic time, such as changing of tectonism from compression to extension and thinning of the lithosphere to a peak at that time and causing much more extensive and intensive magmatism. Most gold deposits were formed during the reverse period, which indicates that gold mineralization is probably related to these deep processes. That is to say along with going up of mantle materials and energy, metallogenic elements including Au were reactivated and transported to upper crustal level, and then deposited at preferred structural sites.
WOS关键词	CHINA ; ZIRCON
WOS研究方向	Geology
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000187622300024
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/79035]
专题	中国科学院地质与地球物理研究所
通讯作者	Li, YG
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Inst henan Geosci, Zhengzhou 450053, Peoples R China
推荐引用方式 GB/T 7714	Li, YG,Zhai, MG,Miao, LC,et al. Relationship between intrusive rocks and gold mineralization of the Anjiayingzi gold deposit, Inner Mongolia and its implications for geodynamics[J]. ACTA PETROLOGICA SINICA,2003,19(4):808-816.
APA	Li, YG,Zhai, MG,Miao, LC,Zhu, JW,&Xue, LW.(2003).Relationship between intrusive rocks and gold mineralization of the Anjiayingzi gold deposit, Inner Mongolia and its implications for geodynamics.ACTA PETROLOGICA SINICA,19(4),808-816.
MLA	Li, YG,et al."Relationship between intrusive rocks and gold mineralization of the Anjiayingzi gold deposit, Inner Mongolia and its implications for geodynamics".ACTA PETROLOGICA SINICA 19.4(2003):808-816.