Mineralogical characteristics and metallogeny of the Hongniu-Hongshan copper deposit in Zhongdian area, Yunnan Province, China

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	Mineralogical characteristics and metallogeny of the Hongniu-Hongshan copper deposit in Zhongdian area, Yunnan Province, China
	Peng HuiJuan 4; Li HongYing ; Pei RongFu ; Zhang ChangQing ; Zhou YunMan 1; Tian Guang 2; Li JianXin 1; Long Fei 1
刊名	ACTA PETROLOGICA SINICA
	2014
卷号	30 期号:1 页码:237-256
关键词	Skarn copper deposit Mineralogical characteristics Metallogeny Hongniu-Hongshan Zhongdian
ISSN号	1000-0569
英文摘要	The Hongniu-Hongshan deposit is a newly discovered porphyry-skam copper deposit in Zhongdian volcanic arc, which belongs to Southwest Sanjiang metallogenic belt. The deposit occurs within the hydrothermal alteration zone of the Yanshanian felsic intrusion which emplaced into Triassic carbonate and marble. The biotite and amphibole phenocryst in the quartz monzonite porphyry related to the mineralization contain abundant fluorine, respectively reached 1. 49% and 2. 62%, indicating that the magma are rich in water and fluorine. The quartz phenocryst show a skeletal texture, which indicate the magma undergone rapid rising, and the growth embayments, resorption surfaces, and high-K edge indicate the quartz phenocryst undergone autometasomatic process. In addition, the magmatic hydrothermal breccias in a drill core suggest that magmatic hydrothermal breccias were generated by explosive, fluid released from crystallizing porphyry, and there probably be concealed porphyry in the deep. The prograde stage coule be divided into three main substage: aluminum-riched garnets ( And(22-57)) and diopside (Hd(7-27)) in the first substage formed by diffusive metasomatism, and the fluid formed from high temperature magmatic degassing; Iron-riched garnets (And(75-98)) and pyroxenes (HD10-99) in the second substage formed by advective metasomatism, and the large scale fluid formed by magmatic fluid exsolution; The skarn mineral veins in the last substage probably formed from residual fluid of the metasomatism. The formation of skarn lead to the CO2 lost, mineral volume decreased, and open space created, permeability and porosity increased, which well-produced for mineralization. In the retrograde stage, the mineral assemblage mainly is epidote, amphibole, chlorite and sulfides. In the early retrograde stage, porosity decreased owning to hydrous minerals, fluid pressure increased leaded to fluid boiling and cryptoexplosion, as the result, the fluid temperature and pressure decrease, and copper precipitation. In the last stage, owning to the repeated boiling of fluid, formed open system, acidic magmatic fluid mixed with atmospheric water, copper precipitation.
学科主题	矿床地质
WOS关键词	MAGMATIC-FLUID ; SKARN DEPOSIT ; RANGE PLUTONS ; ORE-DEPOSITS ; EVOLUTION ; QUARTZ ; MINERALIZATION ; INCLUSIONS ; FLUORINE ; TEXTURES
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000330817100018
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40435]
专题	中国地质科学院矿产资源研究所
作者单位	1.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China 2.Yunnan Gold Min Ind Grp, Kunming 650000, Peoples R China 3.China Univ Geosci, Beijing 100037, Peoples R China 4.中国地质科学院矿产资源研究所
推荐引用方式 GB/T 7714	Peng HuiJuan,Li HongYing,Pei RongFu,et al. Mineralogical characteristics and metallogeny of the Hongniu-Hongshan copper deposit in Zhongdian area, Yunnan Province, China[J]. ACTA PETROLOGICA SINICA,2014,30(1):237-256.
APA	Peng HuiJuan.,Li HongYing.,Pei RongFu.,Zhang ChangQing.,Zhou YunMan.,...&Long Fei.(2014).Mineralogical characteristics and metallogeny of the Hongniu-Hongshan copper deposit in Zhongdian area, Yunnan Province, China.ACTA PETROLOGICA SINICA,30(1),237-256.
MLA	Peng HuiJuan,et al."Mineralogical characteristics and metallogeny of the Hongniu-Hongshan copper deposit in Zhongdian area, Yunnan Province, China".ACTA PETROLOGICA SINICA 30.1(2014):237-256.