| 李双喜,刘跃青,杜菊民,孙晨,傅士斌.坦桑尼亚恩泽加绿岩带玛汀杰金矿地质特征及成因初析[J].地质找矿论丛,2021,36(4):526-537 |
| 坦桑尼亚恩泽加绿岩带玛汀杰金矿地质特征及成因初析 |
| Geological characteristics and genesis of Martinjie Au deposit in Nzega greenstone belt, Tanzania |
| 投稿时间：2021-08-25 |
| DOI：10.6053/j.issn.1001-1412.2021.04.014 |
| 中文关键词: 恩泽加绿岩带 玛汀杰金矿 韧性剪切带 石英脉金矿石 坦桑尼亚 |
| 英文关键词:Nzega greenstone belt Martinjie Au deposit ductile-shear-zone quartz vein type Au deposit Tanzania |
| 基金项目:国外矿产资源风险勘查专项资金"坦桑尼亚恩泽加地区玛汀杰金矿普查"项目（编号：苏地矿发〔2018〕186号）资助。 |
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| 中文摘要: |
| 通过对坦桑尼亚恩泽加绿岩带玛汀杰金成矿区的4个金矿（化）体的成矿背景和地质特征进行分析，初步了解该区金矿体地质特征及矿床成因。玛汀杰金矿为产自韧性剪切带的石英脉型金矿，赋矿层位为太古代尼安兹超群绿片岩，矿体由NW向和EW向两组构造控制，矿石类型包括石英脉型、蚀变岩型和构造角砾岩型。普遍发育黄铁绢英云化。矿石w（Au）=0.62×10-6~3.04×10-6，部分矿石w（Au）值大于100×10-6。玛汀杰地区金矿为典型的产自绿岩带韧性剪切带的石英脉型金矿，矿床成因为热液成因。 |
| 英文摘要: |
| Metallogenic background and geological characteristics of four Au deposits at Martinjie Au ore area in Nzega greenstone belt are analyzed in this paper. Martinjie is a quartz vein type Au deposit hosted by green schist of Archean Nyanzian super-group in ductile shear zone. Ore bodies are controlled by EW and NE faults. Ore includes quartz vein, altered cataclastic rock and tectonic breccia ore types. Phyllic alteration is widely developed. Grade of the ore is generally w(Au)=0.62×10-6 to 3.04×10-6; some w(Au)>100×10-6. Au deposits in Martinjie area are typical hydrothermal deposit occurring as quartz vein in ductile shear zone in greenstone belt. |
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