Characteristics of skarn minerals in Yongping copper deposit, Jiangxi Province, and geological significances

	Characteristics of skarn minerals in Yongping copper deposit, Jiangxi Province, and geological significances
	Tian MingJun 1,2; Li YongGang 1; Wan HaoZhang 3; Zhang Yu 1,2; Gao TingTing 1,2
刊名	ACTA PETROLOGICA SINICA
	2014-12-01
卷号	30 期号:12 页码:3741-3758
关键词	Yongping copper deposit Garnet Epidote diopside garnet skarn Mineral zonation Jiangxi Province
ISSN号	1000-0569
文献子类	Article
英文摘要	The main ore skarn in Yongping copper deposit is epidote diopside garnet skarn, which is typical ore-bearing skarn related to porphyry intrusion. On the basis of study on the main ore-bearing garnet skarns, we divided the garnets into two generations: (1) an early generation of garnets, distributing at the core of garnet crystal, X-Adr = 1.0, and mainly of andradite, indicating an oxidized state; (2) a late generation of garnets, which is generally nucleated along garnet cracks, or on the surface of the early garnets near the fluid channels, with oscillatory zonation, and belongs to andradite-grossularite series with X-Adr = 0.46 similar to 0.99. Other minerals formed during garnet replacement process include epidote, fluorite, calcite, quartz and so on. Partitioning of Fe3+-Al3+ among coexisting garnet and epidote solid solutions may reflect variations of oxygen fugacity, component concentration and/or a(Fe)(3+)/aAl(3+) Metal minerals would also precipitate from this period. Skarn in the Yongping deposits has a general spatial zonation-within the contact zone between skarn and marble. From the pluton to wall rock, the content of garnet decreases, and its color changes from red-brown, brown, brown-green, yellow-green, to light-yellow. Moreover, the ore grade decreases coincidently with the Al2O3 content of garnet. We consider that these changes are result of metasomatism between ore-bearing hydrothermal fluid and early skarns, represented by Fe3+-Al3+ substitution in garnet and epidote. This trend of skarn minerals in ore deposits may be used as a guide for deposits exploration.
WOS关键词	YANGTZE-RIVER VALLEY ; SOUTH CHINA ; METALLOGENIC BELT ; AQUEOUS-SOLUTIONS ; FLUID INCLUSION ; CHEMICAL INTERACTION ; PHASE-RELATIONS ; MAGMATIC BRINE ; MINERALIZATION ; EPIDOTE
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000347270400023
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/85149]
专题	中国科学院地质与地球物理研究所
通讯作者	Tian MingJun
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.912 Geol Party JBEDGMR, Yintan 35000, Peoples R China
推荐引用方式 GB/T 7714	Tian MingJun,Li YongGang,Wan HaoZhang,et al. Characteristics of skarn minerals in Yongping copper deposit, Jiangxi Province, and geological significances[J]. ACTA PETROLOGICA SINICA,2014,30(12):3741-3758.
APA	Tian MingJun,Li YongGang,Wan HaoZhang,Zhang Yu,&Gao TingTing.(2014).Characteristics of skarn minerals in Yongping copper deposit, Jiangxi Province, and geological significances.ACTA PETROLOGICA SINICA,30(12),3741-3758.
MLA	Tian MingJun,et al."Characteristics of skarn minerals in Yongping copper deposit, Jiangxi Province, and geological significances".ACTA PETROLOGICA SINICA 30.12(2014):3741-3758.