Some new data on the genesis of the Linghou Cu-Pb-Zn polymetallic deposit-Based on the study of fluid inclusions and C-H-O-S-Pb isotopes

	Some new data on the genesis of the Linghou Cu-Pb-Zn polymetallic deposit-Based on the study of fluid inclusions and C-H-O-S-Pb isotopes
	Yanwen Tang; Xiaofeng Li; Xiaoqi Zhang; Jianling Yang; Yuling Xie; Lantingguang; Youfu Huang; Cheng Huang; Rongchao Yin
	2015
发表期刊	Ore Geology Reviews
卷号	71 期号:1 页码:248-262
摘要	The Linghou deposit, located near Hangzhou City of Zhejiang Province, eastern China, is a medium-sized polymetallic sulfide deposit associated with granitic intrusion. This deposit is structurally and lithologically controlled and commonly characterized by ore veins or irregular ore lenses. In this deposit, two mineralization events were identified, of which the former produced the Cu-Au-Ag orebodies, while the latter formed Pb-Zn-Cu orebodies. Silicification and calc-silicate (skarn type), phyllic, and carbonate alternation are four principal types of hydrothermal alteration. The early Cu-Au-Ag and late Pb-Zn-Cu mineralizations are characterized by quartz +/- sericite + pyrite + chalcopyrite + bornite +/- Au-Ag minerals +/- magnetite +/- molybdenite and calcite + dolomite + sphalerite + pyrite + chalcopyrite + galena, respectively. Calcite clusters and calcite +/- quartz vein are formed during the late hydrothermal stage. The NaCl-H2O-CO2 system fluid, coexisting with NaCl-H2O system fluid and showing the similar homogenization temperatures (385 degrees C and 356 degrees C, respectively) and different salinities (16.89-21.68 wt.% NaCl eqv. and 7.70-15.53 wt.% NaCl eqv.), suggests that fluid immiscibility occurred during the Cu-Au-Ag mineralization stage and might have given rise to the ore-metal precipitation. The ore-forming fluid of the Pb-Zn-Cu mineralization mainly belongs to the NaCl-H2O-CO2 system of high temperature (similar to 401 degrees C) and mid-high salinity (10.79 wt.% NaCl eqv.). Fluids trapped in the quartz-chalcopyrite vein, Cu-Au-Ag ores, Pb-Zn-Cu ores and calcite clusters yielded delta(OH2O)-O-18 and delta D values varying from 5.54%. to 13.11%. and from -71.8 parts per thousand to -105.1 parts per thousand, respectively, indicating that magmatic fluids may have played an important role in two mineralization events. The delta C-18(PDB) values of the calcite change from -2.78%. to -4.63%, indicating that the CO32- or CO2 in the ore-forming fluid of the Pb-Zn-Cu mineralization was mainly sourced from the magmatic system, although dissolution of minor marine carbonate may have also occurred during the ore-forming processes. The sulfide minerals have homogeneous lead isotopic compositions with Pb-206/Pb-204 ranging from 17.958 to 18.587, Pb-207/Pb-204 ranging from 15.549 to 15.701, and Pb-208/Pb-204 ranging from 37.976 to 39.052, indicating that metallic elements of the Linghou deposit came from a mixed source involving mantle and crustal components. Based on geological evidence, fluid inclusions, and H-O-C-S-Pb isotopic data, the Linghou polymetallic deposit is interpreted as a high-temperature, skarn-carbonate replacement type. Two types of mineralization are both related to the magmatic-hydrothermal system, with the Cu-Au-Ag mineralization having a close relationship with granodiorite.
关键词	Linghou (Jiande) Polymetallic Deposit Qinzhou-hangzhou Metallogenic Belt C–h–o–s–pb Isotopes Fluid Immiscibility Skarn-carbonate Replacement Type Deposit Ore Genesis
学科领域	矿床地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/5792
专题	矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文矿床地球化学国家重点实验室
推荐引用方式 GB/T 7714	Yanwen Tang,Xiaofeng Li,Xiaoqi Zhang,et al. Some new data on the genesis of the Linghou Cu-Pb-Zn polymetallic deposit-Based on the study of fluid inclusions and C-H-O-S-Pb isotopes[J]. Ore Geology Reviews,2015,71(1):248-262.
APA	Yanwen Tang.,Xiaofeng Li.,Xiaoqi Zhang.,Jianling Yang.,Yuling Xie.,...&Rongchao Yin.(2015).Some new data on the genesis of the Linghou Cu-Pb-Zn polymetallic deposit-Based on the study of fluid inclusions and C-H-O-S-Pb isotopes.Ore Geology Reviews,71(1),248-262.
MLA	Yanwen Tang,et al."Some new data on the genesis of the Linghou Cu-Pb-Zn polymetallic deposit-Based on the study of fluid inclusions and C-H-O-S-Pb isotopes".Ore Geology Reviews 71.1(2015):248-262.

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