| 任华,李善平,邱炜.青海三江成矿带莫海拉亨铅锌矿床地质特征与成矿机理浅析[J].矿产勘查,2016,7(4):516-524 |
| 青海三江成矿带莫海拉亨铅锌矿床地质特征与成矿机理浅析 |
| Geological characteristics and mineralization mechanism of the Mohailaheng lead-zinc deposit in Sanjiang metallogenic belt, Qinghai |
| 投稿时间：2015-10-26 |
| DOI： |
| 中文关键词: 三江成矿带 莫海拉亨 铅锌矿床 矿床地质 成矿机理 青海 |
| 英文关键词: Sanjiang metallogenic belt, Mohailaheng, lead-zinc deposit, deposit geology, mineralization mechanism, Qinghai |
| 基金项目:青海省科学技术厅重大科技项目(编号:2010-J-A1)和青海省科学技术厅应用基础研究项目(编号:2015-2J-763)联合资助。 |
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| 中文摘要: |
| 针对莫海拉亨铅锌矿区找矿潜力巨大但勘探程度较低这一现状,运用矿床学和矿床成因论的方法分析研究,研究结果表明:容矿地层为下石炭统杂多群(C1z2),赋矿岩石为灰岩,矿体呈似层状、透镜状及扁豆状等展布。矿石类型主要为:方铅矿(闪锌矿)—褐铁矿矿石、黄铁矿—褐铁矿矿石、褐铁矿矿石,具有胶状、他形粒状、球形、半自形、自形粒状和重结晶等结构,发育浸染状、脉状、团块状、角砾状等构造。与成矿作用有关的围岩蚀变主要为硅化、碳酸盐化、白云岩化等,成矿阶段分为5期。成矿物质来源分析表明,研究区铅锌矿更多具有沉积地层来源的特性,矿床形成于新生代印度—亚洲大陆碰撞的背景,矿床成因类型属典型的以碳酸盐岩为容矿岩石的后生矿床。 |
| 英文摘要: |
| Considering the great prospecting potential in the Mohailaheng lead-zinc deposit area but low degree of exploration,geological and metallogenetic analytic methods are carried out in this study. The research results show that host strata is Early Carboniferous Zaduo group(C1z2), and the host rock is limestone.The ore bodies are distributed in forms of layer-like, lens and lenticular. The mainore types include galena (sphalerite)-ballstone ore, pyrite-ballstone ore and ballstone ore. The ore textures have colloform texture, granulitic texture, bulbous texture, hypidioblastic texture, automorphic granular texture and recrystallized texture. And ore structures have impregnated structure, vein structure, crumb structure and brecciated structure. The wallrock alteration related to lead-zinc mineralization mainly are silicification, carbonatization and dolomitization, the metallogenic stage is divided into five phases. The analysis result of the ore-forming source material indicate that the lead-zinc elements in the study area mainly sourced from the sedimentary strata and deposited. The deposit was formed in the Cenozoic period in the background of India-Asia continental collision. The deposit genesis belongs to the typical epigenetic deposit and its host rock is carbonate rock, therefore, it can be called as “Mohailaheng type” lead-zinc deposit. |
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