| 喀喇昆仑地区豹子山铅锌矿地质特征与成因浅析 |
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| 引用本文： | 高峰,菅坤坤,张振凯,潘亮,杜彪.喀喇昆仑地区豹子山铅锌矿地质特征与成因浅析[J].西北地质,2020(2):172-182. |
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| 作者姓名： | 高峰 菅坤坤 张振凯 潘亮 杜彪 |
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| 作者单位： | 陕西省地质调查院;长安大学 |
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| 基金项目： | 国家专项“第二次青藏高原综合科学考察研究”(2019QZKK0806);中国地质调查局“新疆河尾滩—河西岗地区1∶5万矿产地质调查”项目(DD20160004-5)。 |
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| 摘 要： | 新疆和田地区豹子山铅锌矿具与热液交代作用有关的后生矿床的地质特征,矿化赋存于中侏罗统龙山组碳酸盐岩中,严格受北西向断裂构造控制,矿石矿物组分简单,主要矿物为菱锌矿和白铅矿,围岩蚀变以赤铁矿化、褐铁矿化为主。矿石S同位素组成分布范围较宽(δ34S=-8.49‰~24.88‰),S具多源性,主要源于沉积岩地层,有地表流体的加入;矿石Pb同位素组成较均一,206Pb/204Pb=18.807~18.822,207 Pb/204 Pb=15.73~15.756,208 Pb/204 Pb=39.055~39.168,μ=9.68~9.73,Pb源于上地壳;矿石δ13CV-PDB=2.85‰~8.25‰,δ18 OV-SMOW=20.04‰~21.07‰,C、O来源于碳酸盐岩,而非岩浆热液。综合矿床地质及同位素特征,认为其成因类型属构造热液-直接交代型铅锌矿。
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| 关 键 词： | 铅锌矿床 同位素 矿床成因 成矿模式 喀喇昆仑 |
Geological Characteristics and Genesis Analysis of Baozishan Pb-Zn Deposit in Karakoram Area |
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| GAO Feng,JIAN Kunkun,ZHANG Zhenkai,PAN Liang,DU Biao.Geological Characteristics and Genesis Analysis of Baozishan Pb-Zn Deposit in Karakoram Area[J].Northwestern Geology,2020(2):172-182. |
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| Authors: | GAO Feng JIAN Kunkun ZHANG Zhenkai PAN Liang DU Biao |
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| Institution: | (Shaanxi Institute of Geological Survey,Xi’an 710054,Shaanxi,China;Chang’an University,Xi’an 710054,Shaanxi,China) |
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| Abstract: | The lead-zinc deposit of Baozishan,which is located in the Hetian area of Xinjiang Province,has the geological characteristics of epigenetic deposit related to hydrothermal metasomatic process.Mineralization occurs in the Middle Jurassic carbonatite of Longshan Formation and is strictly controlled by the NW trending faults.The main ores are smithsonite and acrusite.The alteration of country rocks are mainly hematitization and ferritization.Sulfur isotopic composition in ore has a wide distribution range(δ34 S=-8.49‰~24.88‰),indicating that the S originated from sedimentary strata and the additions of surface fluid.The lead isotopic composition in ore is relatively homogeneous(the values of 206 Pb/204 Pb,207 Pb/204 Pb,207 Pb/204 Pb andμare 18.807—18.822,15.73—15.756,39.055—39.168,9.68—9.73 respectively),with Pb coming from the upper crust.The values ofδ13 C V-PDB andδ18 O V-SMO W vary from 2.85‰to 8.25‰,20.04‰to 21.07‰respectively,implying that C and O are from carbonate rocks rather than magmatic hydrothermal fluid.With the analysis of geology of the deposit and isotopic characteristics,Baozishan deposit is regarded as the tectonic hydrothermal-direct metasomatic lead-zinc. |
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| Keywords: | lead-zinc deposit isotope genesis of ore deposit metallogenic model Karakoram |
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