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江西冷水坑矿田是武夷山地区重要的银铅锌集中区之一。无论是世界上少有的斑岩型银铅锌矿床还是火山沉积-热液改造矿床都独具特色,具有很高的研究意义。该矿田的黄铁矿、闪锌矿和方铅矿等硫化物的δ34S值变化为-3.80‰～6.94‰,平均为1.87‰。大约为-4.11‰的δ13C值与峰值约为2‰的δ34S值的很窄分布表明成矿流体中的碳和硫来源于深部岩浆,并不排除地层提供一部分硫和碳的可能性。硫化物矿石的206Pb/204Pb、207Pb/204Pb和208Pb/204Pb比值分别为17.771～17.867、15.564～15.685和38.235～38.652。地层中火山岩、火山岩沉积岩以及变质岩石的206Pb/204Pb比值为17.899～18.220,与矿石铅既有联系又有分离。然而,矿石和花岗斑岩的长石铅中206Pb/204Pb、207Pb/204Pb和208Pb/204Pb比值是相近的,它们在208Pb/204Pb-206Pb/204Pb和207Pb/204Pb-206Pb/204Pb图上落在同一条直线上。这条铅同位素混合线两个端员分别为上地壳和地幔。这些证据都强烈地支持了成矿物质主要来源于斑岩岩浆系统,地层对于成矿流体和物质的贡献不可或缺。冷水坑是一个典型的与次火山岩有关的岩浆热液成因的Ag-Pb-Zn矿田,成矿作用均发生于中国东部燕山中期陆内环境。
Jiangxi Cold Pits Mine is one of the important silver, lead and zinc concentration areas in Wuyishan. Whether it is the world’s rare porphyry-type silver-lead-zinc deposits or volcanic deposits - hydrothermal alteration deposits are unique, with high research significance. The δ34S values of sulfides such as pyrite, sphalerite and galena in the ore field vary from -3.80 ‰ to 6.94 ‰ with an average of 1.87 ‰. The very narrow distribution of δ13C values of about -4.11 ‰ and δ34S values of about 2 ‰ peak indicate that the carbon and sulfur in the ore-forming fluid are derived from deep magmas and do not rule out the possibility that the formation will provide some sulfur and carbon. The sulfide ore has 206Pb / 204Pb, 207Pb / 204Pb and 208Pb / 204Pb ratios of 17.771 to 17.867, 15.564 to 15.685 and 38.235 to 38.652, respectively. The 206Pb / 204Pb ratio of volcanic rocks, volcanic sedimentary rocks and metamorphic rocks in the strata ranged from 17.899 to 18.220, which was associated with and separated from lead ore. However, the ratios of 206Pb / 204Pb, 207Pb / 204Pb and 208Pb / 204Pb in the feldspars of the ore and granite porphyry are similar and fall on the 208Pb / 204Pb-206Pb / 204Pb and 207Pb / 204Pb-206Pb / 204Pb maps On the same straight line The two lead members of this lead isotope blend line are the upper crust and the mantle respectively. These evidence strongly support that the ore-forming materials are mainly derived from porphyry magmatic systems, and the contribution of formation to the ore-forming fluids and materials is indispensable. The cold puddle is a typical Ag-Pb-Zn orefield that is associated with subvolcanic magmatic hydrothermal. Mineralization occurred in the mid-Yanshanian intracontinental environment in eastern China.