| 贵州西部中、上二叠统界线附近风化壳类型及成矿作用 |
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| 引用本文： | 杨瑞东,鲍淼,廖琍,王伟,魏怀瑞,王强.贵州西部中、上二叠统界线附近风化壳类型及成矿作用[J].矿物学报,2007,27(1):41-48. |
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| 作者姓名： | 杨瑞东 鲍淼 廖琍 王伟 魏怀瑞 王强 |
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| 作者单位： | 1. 贵州大学,贵州 贵阳 550025
2. 贵州省国土资源勘测规划院,贵州 贵阳 550004 |
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| 基金项目： | 国家重点基础研究发展计划项目(编号:2006CB403202)，贵州省科学技术基金，贵州省省长基金，高层次人才基金，博士点建设基金资助项目 |
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| 摘 要： | 贵州西部中、上二叠统界线附近普遍存在不整合面,在不整合面上往往发育厚度不等的风化壳。风化壳主要可归纳为三种类型:茅口组顶部的喀斯特漏斗、洼地中堆积的红粘土风化壳,锰质(铁质)风化壳,峨眉山玄武岩喷发间断面上或玄武岩顶部与龙潭组(宣威组)之间的的高铝高岭石风化壳。喀斯特侵蚀面上的红土风化壳是红土型金矿的赋存层位,峨眉山玄武岩喷发间断面上的高铝高岭石风化壳是铜矿、铝土矿赋存层位,喀斯特侵蚀面上的锰质(铁质)风化壳是锰矿、铁矿赋存层位,而玄武岩顶部与龙潭组(宣威组)之间的高岭石粘土风化壳是稀土、硫铁矿、铝土矿赋存层位。中、上二叠统界线附近风化壳对金、铜、铝土、硫铁、锰和稀土有明显的控制作用。
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| 关 键 词： | 矿产 风化壳 中、上二叠统 贵州 |
| 文章编号： | 1000-4734（2007）-01-0041-08 |
| 修稿时间： | 2006-08-29 |
ANCIENT WEATHERING CRUST AND ITS MINERALIZATION NEAR THE MIDDLE-UPPER PERMIAN BOUNDARY IN WESTERN GUIZHOU PROVINCE, CHINA |
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| YANG Rui-dong,BAO Miao,LIAO Li,WANG Wei,WEI Huai-rui,WANG Qiang.ANCIENT WEATHERING CRUST AND ITS MINERALIZATION NEAR THE MIDDLE-UPPER PERMIAN BOUNDARY IN WESTERN GUIZHOU PROVINCE, CHINA[J].Acta Mineralogica Sinica,2007,27(1):41-48. |
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| Authors: | YANG Rui-dong BAO Miao LIAO Li WANG Wei WEI Huai-rui WANG Qiang |
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| Abstract: | Ancient weathering crust developed well near the Middle-Upper Permian boundary. According to lithology and mineralization,contract relationship between the weathering crust and overlying and underlying strata,the authors suggested that ancient weathering crust near the Middle-Upper Permian boundary may divide into three types: e.g.(1) basalt-lateritic weathering crust of karst-type overlying the Maokou Formation(limestone);(2) manganese and iron weathering crust of karst-type overlying the Maokou Formation(limestone);and(3) tuff-weathering crust(kaolinite) between two basalt erupting episodes,with high contents of Al and kaolinite,or tuff-weathering crust(kaolinite) between basalt and the Longtan Formation/Xuanwei Formation.The basalt-lateritic weathering crust contains abundant lateritic gold deposits,and tuff-weathering crust(kaolinite) between two basalt erupting episodes common contains copper deposits and bauxites,and tuff-weathering crust(kaolinite) between basalt and the Longtan Formation/Xuanwei Formation commonly contains rare-earth deposits,pyrite deposits, bauxites and manganese deposits.Therefore,ancient weathering crusts near the Middle-Upper Permian boundary play an important role in mineralization of gold,copper,bauxites,pyrite,manganese and rare-earth deposits. |
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| Keywords: | mineral weathering crust Middle-Upper Permian Guizhou Province China |
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