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物探与化探  2021, Vol. 45 Issue (1): 29-36    DOI: 10.11720/wtyht.2021.1201
  地质调查·资源勘查 本期目录 | 过刊浏览 | 高级检索 |
砂岩型铀矿航磁微弱异常提取方法
杨玉勤1,2(), 张翔1,2, 石连成1,2, 邓德伟1,2
1.核工业航测遥感中心,河北 石家庄 050002
2.河北省航空探测与遥感技术重点实验室,河北 石家庄 050002
A study of the method of extracting aeromagnetic weak anomalies from sandstone-type uranium deposits
YANG Yu-Qin1,2(), ZHANG Xiang1,2, SHI Lian-Cheng1,2, DENG De-Wei1,2
1. Airborne Survey and Remote Sensing Center of Nuclear Industry, Shijiazhuang 050002, China
2. Hebei Key Laboratory of Airborne Survey and Remote Sensing Technology, Shijiazhuang 050002, China
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摘要 

在中—新生代盆地区,受盆地盖层影响,砂岩型铀矿的航磁ΔT异常信息不明显,这直接影响利用航磁资料寻找砂岩型铀矿的应用效果。开展盆地内航磁微弱信息提取方法的研究,能充分发挥航磁资料在砂岩型铀矿勘查中的作用。本文总结了砂岩型铀矿形成微弱航磁异常的机理,分析界定了航磁微弱磁异常的定量范围,以1∶5万高精度航磁数据为基础,通过对内蒙古西部已发现的层间氧化带砂岩型铀矿床航磁特征进行分析研究,总结出一套利用高通滤波提取砂岩型铀矿上方航磁微弱信息的方法,使用该方法在内蒙古二连盆地某铀成矿带开展了航磁微弱异常提取实验,在3个已发现的氧化带砂岩型铀矿上方提取出航磁微弱异常信息,为利用高精度航磁测量方法在中—新生代盆地区寻找砂岩型铀矿探索出一条新途径。

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杨玉勤
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关键词 层间氧化带砂岩型铀矿航磁弱异常提取    
Abstract

In the Mesozoic and Cenozoic basin areas, the aeromagnetic ΔT anomaly information of sandstone-type uranium deposits is not obvious due to the influence of the basin cover layer, which directly affects the application effect of using aeromagnetic data to find sandstone-type uranium deposits. The research on the method of extracting weak information of aeromagnetic data in the basin can give full play to the role of aeromagnetic data in the exploration of sandstone-type uranium deposits. This paper summarizes the mechanism of the formation of weak aeromagnetic anomalies in sandstone-type uranium deposits, and analyzes and defines the quantitative range of weak aeromagnetic anomalies. On the basis of the 1∶50,000 high-precision aeromagnetic data and through the analysis and research on the aeromagnetic characteristics of the sandstone-type uranium deposits discovered in western Inner Mongolia, a high-pass filtering method was used to extract the aeromagnetic data above the sandstone-type uranium deposit. This method was used to carry out aeromagnetic weak anomaly extraction experiments in a uranium metallogenic belt in Erlian Basin of Inner Mongolia. The aeromagnetic weak anomaly information was extracted above three discovered interlayer oxidation zones of sandstone-type uranium deposits, thus finding a new way in the search for sandstone-type uranium deposits in the Meso-Cenozoic basin area.

Key wordsinterlayer oxidation zone sandstone-type uranium deposit    aeromagnetic survey    aeromagnetic weak magnetic anomaly extraction
收稿日期: 2020-04-22      修回日期: 2020-07-05      出版日期: 2021-02-20
ZTFLH:  P631  
基金资助:中国核工业地质局项目“内蒙古二连浩特地区1∶5万航空物探调查”(201811-1)
作者简介: 杨玉勤(1965-),男,河北正定县人,正高级工程师,长期从事航空物探测量的资料解释工作。Email:498416908@qq.com
引用本文:   
杨玉勤, 张翔, 石连成, 邓德伟. 砂岩型铀矿航磁微弱异常提取方法[J]. 物探与化探, 2021, 45(1): 29-36.
YANG Yu-Qin, ZHANG Xiang, SHI Lian-Cheng, DENG De-Wei. A study of the method of extracting aeromagnetic weak anomalies from sandstone-type uranium deposits. Geophysical and Geochemical Exploration, 2021, 45(1): 29-36.
链接本文:  
https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2021.1201      或      https://www.wutanyuhuatan.com/CN/Y2021/V45/I1/29
Fig.1  伊犁某矿床铀矿体地球化学分带与地表土壤含铁矿物分布[1]
Fig.2  内蒙古西部某铀矿航磁剖面平面
Fig.3  内蒙古西部某铀矿航磁剖面平面(纵向比例放大后)
Fig.4  L3790线航磁原始数据及不同滤波窗口提取微弱磁异常剖面对比
Fig.5  内蒙古西部某铀矿床航磁微弱异常信息
Fig.6  A砂岩型铀矿地磁测量剖面[25]
Fig.7  A铀矿区航磁ΔT、微弱磁异常
Fig.8  B铀矿区航磁ΔT、微弱磁异常
Fig.9  C铀矿区航磁ΔT、微弱磁异常
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