中国非金属矿产分布及主要成矿特征

    THE DISTRIBUTION OF NONMETALLIC MINERAL RESOURCES IN CHINA AND THEIR MAIN FEATURES OF MINERALIZATION

    • 摘要: 中国非金属矿产资源丰富。菱镁矿、滑石、石墨等主要产于华北地台、扬子地台和佳木斯地块的早、中元古代基底中。萤石、明矾石、膨润土、沸石、叶蜡石等主要分布于东南沿海火山岩带。灰岩、白云岩在华北主要产于下古生界,在华南主要产于泥盆系-三叠系。石盐、钾盐、芒硝主要产于西部现代盐湖和东部白垩-早第三纪断陷盆地。硫主要为中生代热液成因,广布于东部。磷矿主要产于扬子地台上震旦统一下寒武统。湘黔边界寒武系底部黑色页岩中的沉积型重晶石矿储量巨大。新疆元古宙辉石岩-碱性纯橄岩蚀变而成的蛭石矿质量极好。

       

      Abstract: Nonmetallic mineral resources are rich in China. Magnesite,talc and graphite mainly occur inthe Early and Middle Proterozoic basement rocks of the North China platform,Yantze platformand Jiamusi block.Fluorite,alunite,bentonite,zeolite and pyrophyllite are mainly distributed involcanic rock belts along the coast of southeastern China. Limestone and dolomite in North Chinamainly occur in the Lower Paleozoic and those in South China in the Devonian- Triassic. Halite,Potash salt and mirabilite mainly occur in modern saline lakes of western China and in Creta-ceous- Eogene downfaulted basins in eastern China. Sulfur is mainly of hydrothermal origin andwidespread in the Mesozoic of eastern China. Phosphorus mainly occurs in the Upper Sinian- Low-er Cambrian of the Yangtze platform. Sedimentary barite reserves are very large in black shale atthe base of the Cambrian on the Hunan-Guizhou border.Vermiculite ores formed by alteration ofProterozoic pyroxenite-alkali dunite in Xinjiang are excellent in quality.

       

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