Metallogeny of the Shilu Fe-Co-Cu deposit, Hainan Island, South China: Constraints from fluid inclusions and stable isotopes

doi:10.1016/j.oregeorev.2013.08.018

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	Metallogeny of the Shilu Fe-Co-Cu deposit, Hainan Island, South China: Constraints from fluid inclusions and stable isotopes
	Yu, Jinjie 4; Mao, Jingwen ; Chen, Fuxiong 1; Wang, Yonghui 1; Che, Linrui 2; Wang, Tiezhu ; Liang, Jiang 1
刊名	ORE GEOLOGY REVIEWS
	2014
卷号	57 页码:351-362
关键词	Mineralization stage Fluid inclusions Stable isotopes Metallogeny Shilu deposit South China
ISSN号	0169-1368
DOI	10.1016/j.oregeorev.2013.08.018
英文摘要	The Shilu deposit is a world-class Fe-Co-Cu orebody located in the Changjiang area of the western part of Hainan Island, South China. The distribution of Fe, Co, and Cu orebodies is controlled by strata of the No. 6 Formation in the Shilu Group and the Beiyi synclinorium. Based on a petrological study of the host rocks and their alteration assemblages, and textural and structural features of the ores, four mineralization stages have been identified: (1) the sedimentary ore-forming period; (2) the metamorphic ore-forming period; (3) the hydrothermal mineralization comprising the skam and quartz-sulfide stage; and (4) the supergene period. The fluid inclusions in sedimentary quartz and/or chert indicate low temperatures (ca. 160 degrees C) and low salinities from 0.7 to 3.1 wt% NaCleq, which corresponds to densities of 0.77 to 0.93 g/cm(3). CO2-bearing or carbonic inclusions have been interpreted to result from regional metamorphism. Homogenization temperatures of fluid inclusions for the skam stage have a wide range from 148 degrees C to 497 degrees C and the salinities of the fluid inclusions range from 1.2 to 22.3 wt.% NaCleq, which corresponds to densities from 0.56 to 0.94 g/cm(3). Fluid inclusions of the quartz-sulfide stage yield homogenization temperatures of 151-356 degrees C and salinities from 0.9 to 8.1 wt.% NaCleq, which equates to fluid densities from 0.63 to 0.96 g/cm(3). Sulfur isotopic compositions indicate that sulfur of the sedimentary anhydrite and Co-bearing pyrite, and the quartz-sulfide stage, was derived from seawater sulfate and thermochemical sulfate reduction of dissolved anhydrite at temperatures of 200 degrees C and 300 degrees C, respectively. H and O isotopic compositions of the skarn and quartz-sulfide stage demonstrate that the ore-forming fluids were largely derived from magmatic water, with minor inputs from metamorphic or meteoric water. The Shilu iron ore deposit has an exhalative sedimentary origin, but has been overprinted by regional deformation and metamorphism. The Shilu Co-Cu deposit has a hydrothermal origin and is temporally and genetically associated with Indosinian granitoid rocks. (C) 2013 Elsevier B.V. All rights reserved.
学科主题	矿床地质
WOS关键词	METABASITES ; GEOCHEMISTRY ; PETROGENESIS ; COPPERBELT ; PROVINCE ; VIETNAM ; SULFATE ; ROCKS ; AGES
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000328869100021
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40433]
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, Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China 2.Hainan Min United Co Ltd, Hainan 572700, Peoples R China 3.China Univ Geosci, Fac Geosci, Beijing 100083, 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	Yu, Jinjie,Mao, Jingwen,Chen, Fuxiong,et al. Metallogeny of the Shilu Fe-Co-Cu deposit, Hainan Island, South China: Constraints from fluid inclusions and stable isotopes[J]. ORE GEOLOGY REVIEWS,2014,57:351-362.
APA	Yu, Jinjie.,Mao, Jingwen.,Chen, Fuxiong.,Wang, Yonghui.,Che, Linrui.,...&Liang, Jiang.(2014).Metallogeny of the Shilu Fe-Co-Cu deposit, Hainan Island, South China: Constraints from fluid inclusions and stable isotopes.ORE GEOLOGY REVIEWS,57,351-362.
MLA	Yu, Jinjie,et al."Metallogeny of the Shilu Fe-Co-Cu deposit, Hainan Island, South China: Constraints from fluid inclusions and stable isotopes".ORE GEOLOGY REVIEWS 57(2014):351-362.