| 乌兹别克中卡兹库姆地貌特征对砂岩型铀矿赋存的制约 |
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| 引用本文： | 孙岳,潘家永,陈正乐,韩凤彬,刘文恒,肖伟峰.乌兹别克中卡兹库姆地貌特征对砂岩型铀矿赋存的制约[J].现代地质,2019,33(5):1070-1078. |
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| 作者姓名： | 孙岳 潘家永 陈正乐 韩凤彬 刘文恒 肖伟峰 |
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| 作者单位： | 1.东华理工大学 江西省数字国土重点实验室,江西 南昌 3300132.中国地质科学院 地质力学研究所,北京 100081 |
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| 基金项目： | 国家自然科学基金项目(41702076);国家自然科学基金项目(U1403292);国家自然科学基金项目(41602071);中国地质调查局项目(DD20160113);江西省数字国土重点实验室开放基金项目(DLLJ201810) |
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| 摘 要： | 为了理清地形地貌对砂岩型铀矿赋存的制约作用,基于GIS技术,利用DEM影像数据提取了中卡兹库姆地区高程、坡度、坡向、地形起伏度及条带剖面等各类地貌因子,并与研究区探明的砂岩型铀矿进行空间关联与定量化分析。研究结果表明砂岩型铀矿赋存的有利地形地貌条件:高程为100~400 m、坡度为0°~5°、地形起伏度为10~35 m、亚流域面积-高程积分值为0.3~0.6;中卡兹库姆地区存在4个较为明显的夷平面,高程分别为:Ⅰ级2 200 m,Ⅱ级1 600 m,Ⅲ级1 100 m,Ⅳ级330~400 m,砂岩型铀矿发育于Ⅳ级夷平面附近;砂岩型铀矿集中于低海拔和低地形起伏度的地区,二者可作为砂岩型铀矿找矿预测的主要参考因素。最后根据地貌因子圈定了中卡兹库姆地区砂岩型铀矿赋存的有利区域,为该区砂岩型铀矿找矿提供依据。
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| 关 键 词： | 中卡兹库姆 DEM 地貌特征 砂岩型铀矿 GIS |
| 收稿时间： | 2018-09-02 |
| 修稿时间： | 2018-12-06 |
Geomorphic Features and Its Constraint to Sandstone-hosted U Deposits Occurrence in Mid-Kezelkum,Uzbekistan |
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| SUN Yue,PAN Jiayong,CHEN Zhengle,HAN Fengbin,LIU Wenheng,XIAO Weifeng.Geomorphic Features and Its Constraint to Sandstone-hosted U Deposits Occurrence in Mid-Kezelkum,Uzbekistan[J].Geoscience——Journal of Graduate School,China University of Geosciences,2019,33(5):1070-1078. |
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| Authors: | SUN Yue PAN Jiayong CHEN Zhengle HAN Fengbin LIU Wenheng XIAO Weifeng |
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| Institution: | 1. Key Laboratory for Digital Land and Resources of Jiangxi Province, East China University of Technology, Nanchang,Jiangxi 330013, China2. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China |
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| Abstract: | The region of Mid-Kezelkum, located at the western of Tianshan orogenic belt in Central Asia, is a famous sandstone-hosted uranium metallogenic province in the world. In order to clean up the controls of the topographic and geomorphic conditions on both formation and conservation of sandstone-hosted U deposits. The elevation, slope, aspect, surface rolling, swath profile, and other kinds of geomorphic features are extracted from digital elevation model (DEM) data using geographic information system (GIS) technology, and geomorphic features with sandstone-hosted U deposits are quantified in this paper. The results show that the favorable landforms for sandstone-hosted U deposits are the elevation of 100 m, the slope of 0°-5°, the topographic relief of 10-35 m, and the sub-basin hypsometric integral (HI) of 0.3-0.6. There are 4 clear planation surfaces in Mid-Kezelkum, and the elevation are 2 200 m (I), 1 600 m (II), 1 100 m (III), and 330-400 m (IV), respectively. The sandstone-hosted U deposits were developed near the IV planation surface. By analyzing the correlation of different geomorphic factors, the sandstone-hosted U deposits are concentrated in the low-altitude and low-relief regions. Both of which can be used as the main factors for prediction of prospecting for sandstone-hosted U deposits. In addition, the favorable sandstone-hosted U deposit areas are delineated by means of spatial analysis and geomorphic features which provide the basis for further prospecting in Mid-Kezelkum. |
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| Keywords: | Mid-Kezelkum DEM geomorphic features sandstone-hosted U deposit GIS |
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