| 摘要: |
| 锰作为一种重要的金属矿产，广泛应用于各种工业领域。世界锰矿资源总量丰富，但分布极不均衡，主要分布在南非、乌克兰、巴西及澳大利亚等国。我国锰矿资源具有总量大、平均品位低及开采难度大等特点，为满足国内需求，我国每年需从海外进口大量锰矿。南部非洲地区锰矿资源丰富，主要有海相沉积受变质型、海相沉积型、热液型及表生型锰矿4种成矿类型。其中，海相沉积受变质型和海相沉积型最为重要，依据含矿岩系特征又进一步将其划分为BIF岩系型锰矿、黑色页岩系型锰矿及硅-泥-灰岩系型锰矿。南部非洲原生锰矿成矿时代主要集中在2.2~2.0 Ga，与Eburnean造山运动时代相耦合；空间上主要分布在古陆块边缘，成矿背景以弧后盆地及边缘盆地为主。南部非洲地区锰矿成矿地质条件优越，且总体找矿勘查程度较低，资源潜力巨大。 |
| 关键词: 锰矿 时空分布 成矿规律 资源潜力 南部非洲 |
| DOI： |
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| 基金项目:商务部技术援外项目(编号[2015]352和[2012]558)及中国地质调查局项目(编号DD20201150和1212011220910)共同资助 |
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| Analysis of metallogenic regularity and resource potential of manganese deposits in southern Africa |
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Sun Hongwei, Ren Junping, Wang Jie, Tang Wenlong, Gu Alei, Zuo Libo
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Tianjin center of China Geological Survey
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| Abstract: |
| As an important metal mineral, manganese is widely used in various industrial fields. The total amount of manganese resources in the world is abundant, but the distribution is extremely uneven, mainly distributed in South Africa, Ukraine, Brazil, Australia and other countries. Manganese ore resources in China are characterized by large amount, low average grade and difficult to produce. In order to meet domestic demand, China needs to import a large amount of manganese ore from overseas every year. Southern Africa is rich in manganese resources, mainly consisting of four metallogenic types: marine sedimentary metamorphic, marine sedimentary, hydrothermal and supergene. Among them, marine sedimentary metamorphic and marine sedimentary types are the most important. According to the characteristics of ore-bearing rock series, it is further divided into BIF rock series-type manganese deposits, black shale series-type manganese deposits and silicon-mud-limestone series-type manganese deposits. The metallogenic epoch of primary manganese deposits is mainly concentrated in 2.2-2.0 Ga, which is coupled with Eburnean orogeny. Spatially, it is mainly distributed on the edge of ancient landmass, and the metallogenic background is mainly back-arc basin and marginal basin. The metallogenic geological conditions of manganese deposits in southern Africa are favorable, and the overall prospecting and exploration level is low, the resource potential is huge. |
| Key words: Manganese Spatial and temporal distribution Metallogenic regularity Resource potential Southern Africa |