文章摘要
黄建乐.综合物探法在砂岩型铀矿中深部找矿中的实践与分析—以新疆昭苏盆地为例[J].地质与勘探,2021,57(5):1099-1106
综合物探法在砂岩型铀矿中深部找矿中的实践与分析—以新疆昭苏盆地为例
Prospecting deeply buried sandstone-type uranium deposits beneath the Zhaosu Basin, Xinjiang by integrated geophysical methods
投稿时间:2020-06-02  修订日期:2021-02-22
DOI:10.12134/j.dzykt.2021.05.014
中文关键词: 砂岩型铀矿 CSAMT-高精度磁测-土壤氡气测量 综合物探 偏高晕 电阻率 中深部找矿
英文关键词: sandstone-type uranium deposit, CSAMT, High-precision magnetics, soil radon measurement, integrated geophysical method, deeply-buried uranium deposit
基金项目:中央财政地勘费项目新疆塔里木盆地乌恰-轮台地区铀矿资源调查评价与勘查(编号:201907) 资助
作者单位E-mail
黄建乐 核工业二一六大队新疆乌鲁木齐 365429280@qq.com 
摘要点击次数: 1564
全文下载次数: 522
中文摘要:
      为了探查昭苏盆地砂岩型铀矿的异常信息,选择了可控源音频大地电磁测量、高精度磁测和土壤氡气测量三种物探方法并简要介绍各方法的工作原理。通过分析昭苏盆地的地质特征物性特征和本区的找矿难点,对昭苏盆地综合物探数据所蕴含的信息进行地质-物探综合解译。实践证明:可控源音频大地电磁测量对低阻和高阻体均有良好的电性响应,可以划分地层、推断断裂构造;高精度磁测可以推断氧化还原界面,辅助解释断裂构造;土壤氡气测量可辅助解释断裂构造,对地下铀矿体有指示作用,三种方法的技术特性相互补充,提高了物探解释的准确性。突破了伊犁盆地以往600米的找矿深度,并以电性稳定的中阻厚层、磁测异常、氡异常偏高晕和峰-谷状曲线作为预测标志,解决了深埋藏条件下赋矿地质体的圈定难点,在昭苏盆地砂岩型铀矿中、深部找矿工作中取得了良好的效果。
英文摘要:
      The objective of this work was to explore the deeply buried sandstone-type uranium deposits beneath the Zhaosu basin, Xinjiang by integrated geophysical methods. Three geophysical methods were used, including controllable-source audio magnetotellurics (CSAMT), high-precision magnetics (HPM), and gamma-ray-logging-based soil radon measurement (SRM). Combining the data of geology and physical properties in the basin, the survey anomalies were interpreted for ore-search information. Results show that the CSAMT has good electrical response to low- and high-resistance targets, permitting to divide strata and infer fault structure. The HPM can assist to explain the fault structure and morphology of the basement, and SRM can also assist in the interpretation of fault structure with an indicator of uranium deposits. Due to distinct technical characteristics, the three methods complement each other and improve the accuracy of geophysical interpretation. This work broke through the limit of the previous 600 m prospecting depth in the Yili Basin, found the prediction marks as the medium resistivity thick layer, high radon anomaly and peak-valley curve, and solved the difficulties of delineating ore-bearing geological bodies at depth. In sum, a good effect have been obtained in the prospecting of deeply-buried sandstone-type uranium deposits in the Zhaosu Basin.
查看全文   查看/发表评论  下载PDF阅读器
关闭