| 论中国岩溶铝土矿的成因与生物和有机质的成矿作用 |
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| 引用本文： | 刘长龄,覃志安.论中国岩溶铝土矿的成因与生物和有机质的成矿作用[J].地质找矿论丛,1999,14(4):24-28. |
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| 作者姓名： | 刘长龄 覃志安 |
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| 作者单位： | 天津地质研究院,天津,300061 |
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| 摘 要： | 中国铝土矿以石炭纪溶型硬水铝石为主，占世界同类型矿床的９０％以上。其形成条件因长期处于湿热的古热带地区，铝硅酸盐岩石（包括基底碳酸盐岩石中粘土民页岩夹层）经强烈的风化，特别是经作用产生粘土质、铝凝胶等胶体一碎屑物质，经水流冲刷并作短程搬对盆地而成为湖沼沉积、海浪或泻湖沉积。生物和衍生的有机质的成矿作用遍及各个阶段；如早期风化淋滤作用，搬运阶段的护胶作用，沉积水盆中有机物的吸附、分解及净化作用，同生
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| 关 键 词： | 岩溶铝土矿 成因 生物 有机质 |
| 收稿时间： | 1999/9/12 0:00:00 |
| 修稿时间： | 1999-09-12 |
ON ORIGIN OF KARST BAUXITE IN CHINA AND BIO-ORGANIC METALLOGENESIS |
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| LIU Chang-ling and QIN Zhi-an.ON ORIGIN OF KARST BAUXITE IN CHINA AND BIO-ORGANIC METALLOGENESIS[J].Contributions to Geology and Mineral Resources Research,1999,14(4):24-28. |
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| Authors: | LIU Chang-ling and QIN Zhi-an |
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| Institution: | Tianjin Geological Academy, Tianjin 300061, China;Tianjin Geological Academy, Tianjin 300061, China |
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| Abstract: | Bauxie in China is dominated by Carboniferous Karst diaspore type which account for >90% of this type in the world.In ancient hot and wet tropic zone, strong weathering of silicate rock (including clay and shale intracalasts) generated clayey material and alumina gel which were washed by water and shortly transported,then deposited to form bauxite in ajacent basin,such as lake, marsh, bay or lagoon. Organism and the derived materials played roles in different stages of the bauxite metallogenesis, such as transportation, organic material protected gel, the absorption, resolution and purification of large amount of orgrnic matter in water of sedimentary basin in which syngenetic and diagenetic stages were under reduction and diaspore and pyrite formed. In the supergenetic stage the oxidation of organic matter and pyrite made ore lose Si, S and Fe, become rough and porous ores rich in alumina. |
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| Keywords: | karst bauxite origin organism organic matter |
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