中文摘要:霍什布拉克铅锌矿是西南天山地区的典型矿床。矿床以晚古生代碳酸盐岩-碎屑岩为容矿岩石，矿体呈板状、层状、似层状产于上泥盆统坦盖塔尔组上岩性段灰岩层位中，宏观及微观现象均显示后生成矿特点，围岩蚀变较弱。矿石矿物主要为方铅矿、闪锌矿，少量黄铜矿，脉石矿物以黄铁矿、方解石、白云石、石英为主。黄铁矿Co/Ni比值<1，指示其成因与盆地流体相关，闪锌矿浅色、贫铁〔w(Fe) 0.652%～1.797%〕，反映中低温成矿。矿石中热液方解石、白云石δ13CV-PDB＝-1.9‰～2.6‰，δ18OV-SMOW＝22.41‰～24.67‰，流体包裹体δDV-SMOW＝-102‰ ～ -77‰，平衡流体δ18OH2O V-SMOW＝9.97‰～13.35‰，反映成矿流体主要为盆地中的封存水，而其中的碳主要来源于围岩碳酸盐岩。矿石中硫化物δ34S值多数集中于16‰～24‰，指示硫来源于海相硫酸盐的热化学还原。矿石铅同位素206Pb／204Pb、207Pb／204Pb、208Pb／204Pb变化范围分别为17.847～18.173、15.586～15.873、37.997～38.905，与围岩碳酸盐岩地层具有可比性，而明显不同于矿床附近二叠纪侵入岩体，指示围岩提供了成矿物质。铅同位素组成和相关参数指示成矿物质主要来源于上地壳。综合地质、地球化学特征，作者认为霍什布拉克铅锌矿床是造山期逆冲推覆作用使盆地流体大规模活化、运移形成的MVT型矿床。
Abstract:The Huoshibulake ore deposit is a typical Zn-Pb deposit in southwestern Tianshan, Xinjiang. In this ore deposit， Zn-Pb ore bodies assume tabular, stratiform and stratoid forms and are hosted by limestone of upper Devonian Tangaitaer Formation. Mineralization shows evident epigenetic characteristics with weak wall rock alteration. Ore minerals are mainly galena, sphalerite, and a small amount of chalcopyrite, whereas gangue minerals are mainly pyrite, calcite, dolomite and quartz. Pyrite is characterized by Co/Ni ratio<1, suggesting a genesis related to sedimentary basin fluid processes. Sphalerite in the Zn-Pb ore is light in color and contains poor iron（Fe from 0.652% to 1.797%），indicating that mineralization took place at low to medium temperature. δ13CV-PDB and δ18OV-SMOWof the hydrothermal calcite and dolomite are from -1.9‰ to 2.6‰ and from 22.41‰ to 24.67‰，respectively, δDV-SMOWvalues of the fluid inclusions are from -102‰ to -77‰，and δ18OH2O V-SMOW values of the equilibrium fluid with the hydrothermal carbonate minerals are from 9.97‰ to 13.35‰. The ore-forming fluid might have been pent-up water in the basin, and the CO2 in the ore-forming fluid was probably related to the strata of marine carbonate. δ34S values of the sulfides in ores mostly fall in the range from 16‰ to 24‰, implying that sulfur might have been derived from the marine sulfate thermal chemical reduction. 206Pb／204Pb, 207Pb／204Pb and 208Pb／204Pb of the ores are 17.847 to l8.173, 15.586 to 15.873 and 37.997 to 38.905, respectively. The Pb isotopic compositions are similar to those of the wall rock and obviously different from things of the intrusive rocks near the ore district. The Pb isotopic compositions and related parameters suggest that the ore-forming material probably came mainly from the upper crust supported by the strata. The geological and geochemical characteristics of the Huoshibulake Zn-Pb ore deposit have led the authors to reach the conclusion that this ore deposit resulted from a large-scale basin fluid flow caused by overthrusting during the orogenic movement, similar to MVT in some aspects.
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基金项目:本文得到国家科技支撑计划(2007BAB25B05、2006BAB07B01)、高等学校学科创新引智计划(B07011)、长江学者和创新团队发展计划(IRT0755)联合资助
引用文本：
李志丹,薛春纪,张舒,石海岗,王思程.2010.新疆西南天山霍什布拉克铅锌矿床地质、地球化学及成因[J].矿床地质,29(6):983~998李志丹,薛春纪,张舒,石海岗,王思程.2010.Geology, geochemistry and genesis of Huoshibulake Zn-Pb deposit in southwestern Tianshan, Xinjiang[J].Mineral Deposits29(6):983~998
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