| 滇西新生代盆地沉积特征及砂岩型铀矿成矿条件 |
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| 引用本文： | 赵宝光,陈友良,姚毅峰,陈志国,杜小林.滇西新生代盆地沉积特征及砂岩型铀矿成矿条件[J].铀矿地质,2003,19(6):344-348. |
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| 作者姓名： | 赵宝光 陈友良 姚毅峰 陈志国 杜小林 |
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| 作者单位： | 核工业280研究所,四川,广汉,618300 |
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| 摘 要： | 滇西(怒江以西)地区分布着数十个新生代盆地，且多为小型山问盆地。盆地基底为花岗岩和中高级变质岩，铀源条件良好。各盆地面积不大，沉积厚度不等。沉积物组成了山区河流冲洪积相、湖沼相的灰色含煤建造，其物质成分与基底岩石具明显继承性。地层结构具砂、泥互层特点，砂岩岩性松散，渗透性好，赋存承压水，具有形成后生水成铀矿床的有利条件和一定的找矿前景。
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| 关 键 词： | 滇西新生代盆地 沉积特征 砂岩型铀矿 成矿条件 |
| 文章编号： | 1000-0658(2003)06-0344-05 |
| 修稿时间： | 2003年1月18日 |
Depositional features of Cenozoic basins and metallogenic conditions of sandstone-type uranium deposits in western Yunnan |
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| ZHAO Bao-guang,CHEN You-liang,YAO Yi-feng,CHEN Zhi-guo,DU X iao-lin.Depositional features of Cenozoic basins and metallogenic conditions of sandstone-type uranium deposits in western Yunnan[J].Uranium Geology,2003,19(6):344-348. |
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| Authors: | ZHAO Bao-guang CHEN You-liang YAO Yi-feng CHEN Zhi-guo DU X iao-lin |
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| Abstract: | Tens of Cenozoic basins,mostly small-sized in tr amontane basins,are dispersely distributed in western Yunnan (west to Nujiang ri ver).The basement of these basins is composed of granite and medium-to high-me tamorphosed rocks being favorable uranium source.The area of various basins is n ot great,and the thickness of cover sediments is variable.Sediments in basins co nsist of grey coal-bearing formation composed of fluvial alluvial,proluvial fac ies,lacustrine-swamp facies.The material composition of sedimentary rocks shows inherited features of basement rocks.Cover sediments are characterized by the i ntercalation of sandstone and mudstone.Sandstones are loose,well permeable and w ater-bearing,possessing favorable conditions for the formation of epigenetic hy drogenic uranium deposit,and prospecting potential. |
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| Keywords: | western Yunnan Cenozoic basin depositional feat ures sandstone-type uranium deposit metallogenic condition |
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