| 张翔,谢明宏,张仁红,卢亚运,牛家骥,常树帅,徐顺.基于航磁与 CSAMT综合反演解释的松辽盆地东北部铀成矿构造环境研究[J].矿产勘查,2025,16(6):1420-1430 |
| 基于航磁与 CSAMT综合反演解释的松辽盆地东北部铀成矿构造环境研究 |
| Research on the uranium mineralization tectonic environment in the northeast of Songliao Basin based on comprehensive inversion interpretation of aeromagnetic and CSAMT |
| 投稿时间：2024-03-26 |
| DOI：10.20008/j.kckc.202506011 |
| 中文关键词: 航磁 CSAMT 砂岩型铀矿 松辽盆地东北部 |
| 英文关键词: aeromagnetic CSAMT sandstone type uranium deposits northeast Songliao Basin |
| 基金项目:本文受中国核工业地质局地勘项目(202141-1、202212-16)联合资助。 |
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| 中文摘要: |
| 松辽盆地东北部是近年来砂岩型铀矿勘查关注的重点区域，但因第四系广泛覆盖且勘查程度总体偏低， 深部构造特征及其对铀成矿的制约关系亟待深入研究。针对这一关键地质问题，本文利用最新航磁数 据，采用频谱分析、切线法、2.5D人机交互反演和磁源参数成像(SPI)等多种技术，综合 CSAMT反演结果厘 定了深部构造形态与主要断裂分布，探讨了其与铀成矿的关系。研究结果表明:研究区北北东向—北东 向、北西向 2组深大断裂主要控制了凹凸构造形态及上白垩统分布，断陷带为古水系发育提供了有利空 间，正向构造带改变了上白垩统地下水动力循环机制，有利于后生改造与含铀流体卸载成矿，克山—拜 泉、明水—三道镇 2片地区是铀矿勘查优先关注的地区。同时指出，在此类第四系广泛覆盖且缺少深钻孔 资料的条件下，采用航磁与 CSAMT综合反演解释可有效减少地球物理解释多解性，对快速解决砂岩型铀 成矿宏观构造环境问题具有重要作用。 |
| 英文摘要: |
| The northeastern part of the Songliao Basin has been a key area of concern in the exploration ofsandstone uranium deposits in recent years. However, due to the wide coverage of the Quaternary system and theoverall low exploration degree, the deep structural characteristics and their restrictive relationship on uranium min.eralization urgently need in-depth research. In response to this key geological issue, this paper utilizes the latestaeromagnetic data and employs multiple techniques such as spectral analysis, tangential method, 2.5D human-computer interaction inversion, and magnetic source parametric imaging (SPI). By integrating the CSAMT inversionresults, the deep structural morphology and the distribution of major faults are determined, and the relationship be.tween them and uranium mineralization is explored. The research results show that: The two groups of deep andlarge faults in the study area, namely the northeast-northeast-and northeast-northwest, mainly control the concave-convex structural morphology and the distribution of the Upper Cretaceous. The fault depression zone provides a fa.vorable space for the development of paleowater systems. The forward structural zone alters the groundwater dy.namic circulation mechanism of the Upper Cretaceous, which is conducive to habiotic transformation and uranium-bearing fluid offloading mineralization. The two areas of Keshan -Baiquan and Mingshui -Sandao Town are the pri.ority areas for uranium exploration. At the same time, it is pointed out that under the conditions where such quater.nary systems are widely covered and there is a lack of deep borehole data, the comprehensive inversion interpreta.tion of aeromagnetic and CSAMT can effectively reduce the multi-solution nature of geophysical interpretation,which plays an important role in rapidly solving the macroscopic tectonic environment problems of sandstone-typeuranium mineralization. |
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