| 内蒙古查干德勒苏地区构造演化与铀的富集 |
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| 引用本文： | 张万良,陈贵华,石平,刘秋德,付湘.内蒙古查干德勒苏地区构造演化与铀的富集[J].铀矿地质,2002,18(5):278-281. |
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| 作者姓名： | 张万良 陈贵华 石平 刘秋德 付湘 |
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| 作者单位： | 核工业地质局270研究所,江西南昌县,330200 |
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| 摘 要： | 位于两大构造单元结合带的查干德勒苏地区，中元古代在近EW向裂陷槽内接受了巨厚的含炭质、白云质和火山物质的渣尔泰群滨浅海相沉积建造，铀元素得到第一次预富集；大约1.4Ga前的白云鄂博运动，出现大量中酸性岩浆侵入和广泛的区域变质作用、混合岩化作用，铀元素得到第二次预富集；晚石炭世末的中华力西运动第Ⅱ幕，形成罕乌拉、英巴岩基的主体，铀元素得到第三次预富集；早白垩世早期的陆相断陷盆地沉积，含有较多的有机质，铀元素得到第四次预富集；新生代喜马拉雅构造运动期，气候干旱炎热，在地表地下水的作用下，铀元素出现了一次大规模的活化、迁移和富集，成为查干德勒苏地区砂岩型铀矿的主要矿化期。
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| 关 键 词： | 内蒙古 查干德勒苏地区 构造演化 富集 铀矿床 矿化作用 |
| 文章编号： | 1000-0658(2002)05-0278-04 |
| 修稿时间： | 2001年5月24日 |
Tectonic evolution of Chagandelesu area and uranium concentration, Inner Mongolia |
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| ZHANG Wan,liang CHEN Gui,hua SHI Ping LIU Qiu,de FU xiang.Tectonic evolution of Chagandelesu area and uranium concentration, Inner Mongolia[J].Uranium Geology,2002,18(5):278-281. |
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| Authors: | ZHANG Wan liang CHEN Gui hua SHI Ping LIU Qiu de FU xiang |
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| Abstract: | The Chagandelesu area is located at the convergence site of two tectonic units.It accepted thick littoral and shallow marine sediments composed of carbonaceousr dolomitic and volcanic materials--Zhartai Group during Middle Proterozoic period in an EW trending aulacogen,and uranium showed the first time pre concentration.In the region,considerable intrusion of acid intermediate magma and extensive regional metamorphism and migmatitization appeared at above 1.4 Ga ago,and uranium was pre concentrated for the second time.The second episode of Middle Hercynian orogeny at the end of Late Carboniferous resulted in the fomation of Hanula and Yingba batholithic massifs making the uranium be pre concentrated for the third time.In the early period of Early Cretaceous,the continental down faulted basins were formed,the sediments which contained abundant organic matter and uranium was pre concentrated for the fourth time.At last,during the Himalayan neotectonic period,there occurred the aridization of paleoclimate and by the action of surface water and groundwater,uranium was extensively remobilized,transported and concentrated forming major sandstone hosted uranium deposits in Chagandelesu area. |
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| Keywords: | tectonic evolution uranium concentration Chagandelesu area |
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