| 摘要: |
| 东北非地区主要包括了非洲的埃及、苏丹、厄立特里亚、埃塞俄比亚，该地区金、银、铜、锌等矿产资源丰富，主要矿床类型为VMS矿床。文章介绍了东北非VMS矿床特征及时空分布，着重对近年来东北非VMS矿床的勘查、研究取得的进展进行了梳理和总结。自发现Ariab、Bisha等大型VMS型矿床以来，各国矿业公司在本地区开展勘探和开发，并新发现大量矿床，铜金等矿产潜在可开采资源不断增加。本地区VMS矿床大多与火山弧岩石组合有着直接的或间接的成因联系，矿床形成集中于三个阶段，已发现的VMS矿床主要位于东北非努比亚地盾的偏中北部，在东非造山带南部较少发现，集中于Barka、Gabgaba、Eastern Desert地体，找矿有利区位于Barka、Nakasib、Keraf、Nugrus缝合带附近。矿床主要控矿因素为剪切带、褶皱和具有一定特征的变质火山沉积岩系，矿床形成于两类古构造环境：洋内汇聚板块边缘的岛弧环境和弧后盆地环境。 |
| 关键词: VMS矿床 东北非 努比亚 勘查 成矿规律 厄立特里亚 埃塞俄比亚 苏丹 埃及 |
| DOI： |
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| 基金项目:中国地质调查局项目 “北部非洲大型铜金资源基地评价”（DD20190443） |
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| Geological characteristics and exploration and research progress of Northeast Africa VMS deposits |
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Xiang Wen Shuai1, Zhao Kai1, Hu Peng2, Zhang Zicheng3, Wang Jianxiong1, Zeng Guoping1, Li Fulin1
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1.Wuhan Center of China Geological Survey;2.Wuhan Center of China Geological Sunvey;3.China Geological Mining Company Ltd.
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| Abstract: |
| The main countries in North East Africa include Egypt, Sudan, Eritrea and Ethiopia, which have rich mineral resources such as gold, silver, copper and zinc, and the main types of mineral deposits are VMS deposits. Since the discovery of large VMS deposits such as Ariab and Bisha, mining companies from various countries have been exploring and developing in the region, and have discovered a large number of new deposits, increasing the potential mineable resources of copper and gold. The VMS deposits in this region have some relatively unique characteristics, the deposits are mainly formed in three mineralization ages concentrated in three stages, and the discovered VMS deposits are mainly concentrated in Barka, Gabgaba, Eastern Desert land bodies, with prospect areas located near the Barka, Nakasib, Keraf, and Nugrus seam zones. Most are located in the north-central part of the NE African Nugrus Shield and are less commonly found in the southern part of the Eastern African orogenic belt. The main controlling factors for the deposits are shear zone control, fold control and characteristic metamorphic volcanic-sedimentary systems, and studies of the deposits indicate that they were formed in two types of paleotectonic environments: island arc environments on the margins of convergent plates in the oceans and back-arc basin environments. |
| Key words: VMS deposits North-East Africa Nubia prospecting mineralization patterns Eritrea Ethiopia Sudan Egypt |