Mineralization Styles and Genesis of the Yinkeng Au-Ag-Pb-Zn-Cu-Mn Polymetallic Orefield, Southern Jiangxi Province, SE China: Evidence from Geology, Fluid Inclusions, Isotopes and Chronology

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	Mineralization Styles and Genesis of the Yinkeng Au-Ag-Pb-Zn-Cu-Mn Polymetallic Orefield, Southern Jiangxi Province, SE China: Evidence from Geology, Fluid Inclusions, Isotopes and Chronology
	Feng Chengyou 3; Li Daxin ; Zeng Zailin 1; Zhang Dequan ; She Hongquan
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2014
卷号	88 期号:3 页码:825-844
关键词	Ore geology geochemistry fluid inclusion SHRIMP zircon U-Pb dating ore genesis Carboniferous Jiangxi Province
ISSN号	1000-9515
英文摘要	The Yinkeng orefield in Yudu County, Jiangxi Province, SE China, is a zone of concentrated Au-Ag -Pb-Zn-Cu-Mn polymetallic ores. Based on summing up basic geology and ore geology of the orefield, the polymetallic deposits in the orefield have been divided into seven major substyles according to their occurring positions and control factors. The ore-forming fluid inclusion styles in the orefield include those of two-phase fluid, liquid CO2-bearing three-phase and daughter mineral-bearing multi-phase. The homogenization temperatures range from 382 degrees to 122 degrees C, falling into five clusters of 370 degrees to 390 degrees, 300 degrees to 360 degrees, 230 degrees to 300 degrees, 210 degrees to 290 degrees and 120 degrees to 200 degrees, and the clusters of 300 degrees to 360 degrees, 230 degrees to 300 degrees and 120 degrees to 200 degrees are three major mineralization stages, with fluid salinity peaks from 4.14% to 7.31%, 2.07% to 7.31% and 0.53% to 3.90%, respectively. The ore-forming fluids are mainly type of NaCl-H2O with medium to high density (0.74-1.02 g/cm(3)), or CO2-bearing NaCl-H2O with medium to low density (0.18-0.79 g/cm(3)). The fluid salinity and density both show a decline tendency with decreasing temperature. According to the measurement and calculation of H- and O-isotopic compositions in the quartz of the quartz-sulfide veins, delta DV-SMOW of the ore-forming fluid is from -84 parts per thousand to -54 parts per thousand, and delta O-18(V-SMOW) of that is from 6.75 parts per thousand to 9.21 parts per thousand, indicating a magmatic fluid. The delta S-34(V-CDT) of sulfides in the ores fall into two groups, one is from -4.4 parts per thousand to 2.2 parts per thousand with average of -1.42 parts per thousand, and the other from 18.8 parts per thousand to 21.6 parts per thousand with average of 19.8 parts per thousand. The S-isotopic data shows one peak at -4.4 parts per thousand to 2.2 parts per thousand (meaning -1.42 parts per thousand). suggesting a simple magmatic sulfur source. The ore Pb-isotopic ratios are Pb-206/Pb-204 from 17.817 to 17.983, Pb-207/Pb-204 from 15.470 to 15.620 and Pb-208/Pb-204 from 38.072 to 38.481, indicating characteristics of mantle-derived lead. The data show that the major ore deposits in the orefield have a magmatic-hydrothermal genesis and that the SHRIMP zircon age of the granodiorite porphyry, closely related to the mineralization, is 151.2 +/- 4.2 Ma (MSWD = 1.3), which can represent the formation ages of the ores and intrusion rocks. The study aids understanding of the ore-forming processes of the major metallic ore deposits in the orefield.
学科主题	矿床地质
WOS关键词	ZIRCON U-PB ; HYDROGEN ISOTOPE ; OXYGEN ; GEOCHRONOLOGY ; GEOCHEMISTRY ; DEPOSITS ; QUARTZ ; WATER
WOS研究方向	Geology
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000339705700010
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40434]
专题	中国地质科学院矿产资源研究所
作者单位	1.CAGS, Inst Mineral Resources, Minist Land & Resources, Key Lab Metallogeny & Mineral Resource Assessment, Beijing 100037, Peoples R China 2.South Jiangxi Geol Survey Party JBGMR, Ganzhou 341000, Peoples R China 3.中国地质科学院矿产资源研究所
推荐引用方式 GB/T 7714	Feng Chengyou,Li Daxin,Zeng Zailin,et al. Mineralization Styles and Genesis of the Yinkeng Au-Ag-Pb-Zn-Cu-Mn Polymetallic Orefield, Southern Jiangxi Province, SE China: Evidence from Geology, Fluid Inclusions, Isotopes and Chronology[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2014,88(3):825-844.
APA	Feng Chengyou,Li Daxin,Zeng Zailin,Zhang Dequan,&She Hongquan.(2014).Mineralization Styles and Genesis of the Yinkeng Au-Ag-Pb-Zn-Cu-Mn Polymetallic Orefield, Southern Jiangxi Province, SE China: Evidence from Geology, Fluid Inclusions, Isotopes and Chronology.ACTA GEOLOGICA SINICA-ENGLISH EDITION,88(3),825-844.
MLA	Feng Chengyou,et al."Mineralization Styles and Genesis of the Yinkeng Au-Ag-Pb-Zn-Cu-Mn Polymetallic Orefield, Southern Jiangxi Province, SE China: Evidence from Geology, Fluid Inclusions, Isotopes and Chronology".ACTA GEOLOGICA SINICA-ENGLISH EDITION 88.3(2014):825-844.