| 坦桑尼亚西北部苏库马绿岩带含金石英脉成矿特征 |
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| 引用本文： | 王建光,彭俊,袁杨森,司建涛,梁永安.坦桑尼亚西北部苏库马绿岩带含金石英脉成矿特征[J].世界地质,2016,35(4):982-992. |
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| 作者姓名： | 王建光 彭俊 袁杨森 司建涛 梁永安 |
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| 作者单位： | 河南省地质矿产勘查开发局 第二地质矿产调查院，郑州 450001 |
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| 摘 要： | 坦桑尼亚克拉通西北部的苏库马绿岩带是坦桑尼亚环维多利亚湖绿岩带重要的金矿聚集区。区内金矿化类型以含金石英脉为主,矿体的产出主要受剪切构造带控制。通过研究区域构造特征和岩石地球化学特征,认为苏库马绿岩带中玄武岩为弧后环境形成,流纹岩和花岗岩形成于陆弧环境,N--S向挤压作用和E--W向伸展作用是区域内主要的构造展布特征。建立了含金石英脉的成矿模式,表明具有金矿化作用的石英脉集中分布在EW、SEE、NE向剪切构造破碎带中,含金石英脉富矿体的形成经历了多期构造变形和成矿流体的叠加、富集作用。
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| 关 键 词： | 坦桑尼亚 苏库马绿岩带 含金石英脉 剪切带 成矿特征 |
Mineralization characteristics of gold-bearing quartz veins in Sukumaland greenstone belt of northwestern Tanzania |
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| WANG Jian-Guang,PENG Jun,YUAN Yang-Sen,CI Jian-Tao,LIANG Yong-An.Mineralization characteristics of gold-bearing quartz veins in Sukumaland greenstone belt of northwestern Tanzania[J].World Geology,2016,35(4):982-992. |
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| Authors: | WANG Jian-Guang PENG Jun YUAN Yang-Sen CI Jian-Tao LIANG Yong-An |
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| Institution: | No. 2 Institute of Geological ﹠ Mineral Ｒesources Survey of Henan，Zhengzhou 450001，China |
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| Abstract: | The Sukumaland greenstone belt of the northwestern Tanzania Craton is an important gold district in Tanzania Vitoria Lake greenstone belt． Gold-bearing quartz vein is the main mineralization，and the distribution of the orebodies is strictly controlled by shear zones． Based on the study of regional tectonic characteristics and geo- chemical characteristics，the authors conclude that the basalts in Sukumaland greenstone belt have been formed in the back-arc setting，the rhyolites and granites formed in the continental arc setting，and N--S pressional structures and E --W extensional structures are the main tectonic framework． The metallogenic model of gold-bearing quartz vein has been eatablished，which shows that mineralized veins are concentrated in EW，SEE and NE shear zones， and the formation of rich orebody has experienced multistage structures deformation，superposition and enrichment of metallogenic fluids． |
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| Keywords: | Tanzania Sukumaland greenstone belt gold-bearing quartz vein shear zone mineralization characteristics |
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