| 黄建国.西昆仑北缘沙拉吾如克铜铅矿地质特征及矿床成因浅析[J].地质与勘探,2018,54(1):1-8 |
| 西昆仑北缘沙拉吾如克铜铅矿地质特征及矿床成因浅析 |
| Preliminary analysis about geological characteristics and genesis of the Shalawuruke copper and lead deposit in the northern margin of western Kunlun |
| 投稿时间：2017-01-12 修订日期：2017-12-20 |
| DOI：10.12134/j.dzykt.2018.01.001 |
| 中文关键词: 西昆仑北缘 沙拉吾如克铜铅矿 斑岩铜矿 加里东期 阿勒玛勒克杂岩体 |
| 英文关键词: northern margin of west Kunlun, Shalawuruke copper and lead deposit, porphyry copper deposit, Caledonian period, Alemaleke complex rock mass |
| 基金项目:西南科技大学博士基金（编号：14zx7126）和四川矿产资源研究中心（编号：SCKCZY2016-ZC05）联合资助 |
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| 中文摘要: |
| 西昆仑北缘沙拉吾如克铜铅矿是区域内较为典型的矿床类型之一，矿体主要赋存于加里东期阿勒玛勒克杂岩体中，受沙拉吾如克断裂的控制。矿石矿物主要有黄铜矿、方铅矿、黄铁矿等，矿石铜铅品位相对较贫，一般Cu含量为 0.50%～1.33%（平均0.7%），Pb为0.60%～5.99%（平均0.9%）。铜铅矿石的稀土总量（ΣREE）为83.5×10-6～122×10-6，相对围岩（ΣREE为257×10-6～342×10-6）来说，明显偏低。铜铅矿石的δEu为0.90～1.04，δCe为0.95～0.96，表现为铕和铈的无异常。含矿岩系稀土元素含量及配分模式显示出成矿元素直接来源于阿勒玛勒克杂岩体，特别是来自晚序次的似斑状石英二长岩或二长花岗岩（均为埃达克岩），矿床类型属于斑岩型矿床，为区域上加里东期成矿事件的产物，与大同一带加里东期铜钼矿的形成具有一致的大陆动力地质学过程，即原特提斯洋（西昆仑北洋）向南俯冲消减，进而引起花岗质岩浆活动并成矿。 |
| 英文摘要: |
| The Shalawuruke copper and lead deposit is one of the typical deposits in the northern margin of western Kunlun, where ore bodies are mainly hosted by Caledonian Alemaleke complex rock mass. The whole deposit is controlled by the Shalawuruke fault. Ore minerals are mainly composed of chalcopyrite, galena, pyrite and so forth. Cu and Pb grade of ore is relatively poor, with general Cu content from 0.50% to 1.33 (average 0.70%), and Pb content from 0.60% to 5.99% (average 0.90%). Total amount of rare earth (ΣREE) of copper-lead ore is 83.5×10-6~122×10-6, and relative to the surrounding rock（ΣREE is 257×10-6~342×10-6）, which is significantly low. δEu and δCe of copper-lead ore is respectively 0.90-1.04 and 0.95-0.96, which shows that there is no Eu and Ce anomalies. From REE contents of ore-bearing rock series and distribution patterns we infer that ore-forming elements came from Alemaleke complex rock mass, especially the later porphyritic-like quartz monzonite or monzogranite, all of which belong to adakite rocks. The deposit type of Shalawuruke copper and lead deposit belongs to porphyry deposits, which is the product of Caledonian metallogenic events. It has a continental dynamic geologic process consistent with the formation of Caledonian copper-molybdenum deposit in the Datong area. It means that the original Tethyan ocean (or northern ocean of west Kunlun) was subducted southward, and then caused granitic magmatism and mineralization. |
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