| 高辉,梅燕雄,王浩琳,范世家.阿富汗铜矿资源潜力与找矿方向[J].矿产勘查,2012,3(5):700-706 |
| 阿富汗铜矿资源潜力与找矿方向 |
| Copper deposit resource potential and prospecting targets in Afghanistan |
| 投稿时间：2012-04-06 |
| DOI： |
| 中文关键词: 阿富汗 铜矿 资源 潜力 找矿勘探 方向 |
| 英文关键词: Afghanistan copper deposit resource potential |
| 基金项目:中央地勘基金支撑计划课题(编号: 2012B1111)资助。 |
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| 摘要点击次数: 2018 |
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| 中文摘要: |
| 阿富汗位于远古印度次大陆同亚洲大陆板块碰撞的交汇处,也是全球性成矿带——特提斯—喜马拉雅造山带(岩浆弧)成矿有利区段,金属矿产资源相当丰富。阿富汗境内已发现大约300多个包括沉积岩型、夕卡岩型、斑岩型和脉岩型等各种类型的铜矿床(点),其中包括世界级的安纳克(Aynak)沉积层控矿床。研究表明,特提斯—喜马拉雅成矿带经历新老特提斯洋的扩张沉积和闭合隆起,两次大规模的板块俯冲碰撞,而后褶皱形成以中、新生代地质演化为主的地球上最年轻的褶皱造山带。阿富汗地质构造也随之经历长期复杂的演化,区域成矿背景从前寒武纪陆内环境向汇聚造山转化,前中—新元古代矿源地体构造和岩浆再度活化,发生岩浆作用及衍生成矿作用(过程),成矿具有偏在性和最佳耦合性等特点。阿富汗铜矿资源潜力巨大,砂页岩型铜矿和斑岩铜(金)矿找矿前景广阔,地表广泛出露的夕卡岩型铜矿及脉岩型铜矿化可能是深部寻找斑岩铜(金)矿的标志和靶区。 |
| 英文摘要: |
| Afghanistan is located in the convergence of Ancient India subcontinent and Asia plate, and it is sure to be a preferable regional prospecting area where Tethys-Himalaya metallogenic belt and magmatic arc running through. There are good conditions for mineralization and extremely metal-rich mineral resources in the region. About more than 300 documented copper deposits (occurrences) have been discovered in Afghanistan, which are composed of sediment-hosted, skarn, porphyry and vein-hosted type, including the world-class sedimentary stratabound Aynak deposit. The research indicates that Tethys-Himalaya metallogenic belt has undergone alternative deposition and uplift during the old and new Tethys Ocean′s expansion and closure, and two large-scale phases of subduction and collision of tectonic plate as well, and then folded and formed the youngest Mesozoic and Cenozoic Orogenic Belts on Earth. Afghanistan has also undergone a complicated tectonic evolution of long history with regional metallogenic background environment’s conversion from the former Cambrian inner continent to convergent orogenic environment. The pre Neo-proterozoic and Meso-proterozoic ore-sourced terranes and the magma reactivated, and the magmatism and derivative mineralization/process occurred, and the mineralization had the favorable conditions such as the mineralization preferentiality and the best coupling. The porphyry copper deposits and sand shale copper deposits developed broadly in Afghanistan with huge copper resources potential. The sand shale copper deposits and the porphyry copper deposits are significant exploration targets. The skarn copper deposits and vein copper deposits, which developed broadly, are the symbols and favorable zones for deep exploration of porphyry copper/gold deposit. |
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