| 摘要: |
| 铜、金为东北非重要矿产资源，成矿潜力巨大，其成矿过程与东非造山带努比亚地盾的演化历史密切相关。矿床类型以造山型矿床和火山块状硫化物（VMS）型矿床为主，斑岩型铜金矿床较少。其中，造山型以金矿床为主，主要赋存于韧-脆性剪切带的石英脉中，集中分布于5个区域；VMS型以铜金矿床为主，主要发育于新元古代火山岩中，集中分布于3个区域，VMS型矿床的氧化带具有较高的品位和较大的资源量。本文在总结东北非区域地质背景、构造演化和铜金矿床资源分布特征的基础上，系统地分析了东北非典型铜金矿床地质特征及赋存形式，以期为国内企业、事业单位在东北非开展铜、金勘查与开发等提供基础地质支撑。 |
| 关键词: 造山型金矿床 VMS型铜金矿床 资源分布 东北非 |
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| 基金项目:北部非洲大型铜金资源基地评价 |
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| Distribution and occurring states of copper-gold mineral resources in Northeast Africa |
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LI Fulin, XIANG Wenshuai, WANG Chenggang, Zeng Guoping, WU Fafu, LIU Jiangtao, WANG Jianxiong, LI Yong
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Wuhan center,China Geological SurveyCentral South China Innovation Center for Geosciences
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| Abstract: |
| Copper-gold deposits are the main types of mineral resources in Northeast Africa. These deposits show great metallogenic potentials, and their metallogenic processes are closely related to the evolution history of Nubian Shield in east African Orogenic Belt. Orogenic gold deposits and Volcanogenic Massive Sulfides (VMS) copper-gold deposits are two main genetic types, while the porphyry type copper-gold deposit is lesser. Orogenic gold deposits are mostly related to the quartz veins of ductile-brittle shear structure,and they are distributed in 5 different regions. However, VMS copper-gold deposits are primarily related to the Neoproterozoic volcanic rocks,and they are distributed in 3 different regions. And the oxide zone of VMS deposits exhibit the relatively high grade and resource of copper-gold.
Combining with regional geology, tectonic evolution and distribution characteristics of copper-gold resources in Northeast Africa, this paper analyzes the geological characteristics and occurring states of copper-gold deposits, which would provide critical clues for the copper-gold exploration or mining development in Northeast Africa by domestic mining enterprises and institutions . |
| Key words: Orogenic Gold Deposit VMS Copper-Gold Deposit Distribution of Mineral Resources Northeast Africa |