Geochronology and ore-forming fluids in the Jinchang skarn gold-copper deposit, Yinan County, western Shandong Province

	Geochronology and ore-forming fluids in the Jinchang skarn gold-copper deposit, Yinan County, western Shandong Province
	Hu FangFang 1; Wang Yong 1; Fan HongRui 1; Zheng XiaoLi 2; Jiao Peng 3
刊名	ACTA PETROLOGICA SINICA
	2010-05-01
卷号	26 期号:5 页码:1503-1511
关键词	Geochronology Fluid Inclusion Jinchang Gold-copper Deposit Yinan County Western Shandong Province
ISSN号	1000-0569
文献子类	Article
英文摘要	The Jinchang skarn Au-Cu deposit is located in Yinan County, western Shandong Province, China. It is hosted by Neoproterozoic to Cambrian sedimentary elastic sequences intercalated with limestone and marble units, intruded by adamellite and granitic porphyries. In the skarn facies, andradite and diopside comprise the main prograde skarn minerals, whereas epidote, chlorite, tremolite, actinolite and calcite are the principal retrograde skarn minerals. Single grain and low background Rb-Sr isochrone dating on biotite from prograde and retrograde skarn gives 133 +/- 6Ma and 128 +/- 2Ma, respectively. Four types of fluid inclusions were distinguished; (1) daughter mineral-bearing inclusions; (2) vapor-rich inclusions; (3) CO(2)-H(2)O inclusions, and (4) salt-saturated inclusions. Fluid inclusions associated with garnet (prograde skarn stage) display high homogenization temperatures and high salinities (530 similar to 570 degrees C; 39. 9% similar to 60. 4% NaCl equiv.). Fluid inclusions associated with epidote (retrograde skarn stage) also record higher homogenization temperatures and salinities (451 similar to 580 degrees C; 39. 3% similar to 60. 7% NaCl equiv.). Fluid inclusions associated with quartz-sulfide stage show two intervals of homogenization, 320 similar to 450 degrees C and 108 similar to 291 degrees C. Some fluid inclusions in garnet contain hematite or magnetite daughters, suggesting an oxidizing magmatic environment. Overall, the Jinchang deposit is interpreted as an oxidized Au-Cu skarn based on the mineralogy and fluid inclusion characteristics.
WOS研究方向	Geology
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000278597800015
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/72598]
专题	中国科学院地质与地球物理研究所
通讯作者	Hu FangFang
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Shandong Gold Co Ltd, Laizhou 264000, Peoples R China 3.Shandong Gold Co Ltd, Yinan Gold Mine, Yinan 276300, Peoples R China
推荐引用方式 GB/T 7714	Hu FangFang,Wang Yong,Fan HongRui,et al. Geochronology and ore-forming fluids in the Jinchang skarn gold-copper deposit, Yinan County, western Shandong Province[J]. ACTA PETROLOGICA SINICA,2010,26(5):1503-1511.
APA	Hu FangFang,Wang Yong,Fan HongRui,Zheng XiaoLi,&Jiao Peng.(2010).Geochronology and ore-forming fluids in the Jinchang skarn gold-copper deposit, Yinan County, western Shandong Province.ACTA PETROLOGICA SINICA,26(5),1503-1511.
MLA	Hu FangFang,et al."Geochronology and ore-forming fluids in the Jinchang skarn gold-copper deposit, Yinan County, western Shandong Province".ACTA PETROLOGICA SINICA 26.5(2010):1503-1511.