大兴安岭南段红山子铀矿床地球物理特征及找矿预测  

Geophysical characteristics and prospecting prediction of uranium deposit in Hongshanzi,southern Da Hinggan Mountains

作　　者：张占彬 张伟[1,2] 李英宾 赵丛 何昕欣[1,2] 汪来 ZHANG Zhanbin;ZHANG Wei;LI Yingbin;ZHAO Cong;HE Xinxin;WANG Lai(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang 050002,Hebei,China;CNNC Key Laboratory for Geophysical Exploration Technology Center of Uranium Resource,Shijiazhuang 050002,Hebei,China)

机构地区：[1]核工业航测遥感中心,河北石家庄050002 [2]中核集团铀资源地球物理勘查技术中心重点实验室,河北石家庄050002

出　　处：《矿产勘查》2020年第11期2505-2514,共10页Mineral Exploration

摘　　要：红山子铀矿床位于沽源-红山子铀成矿带的北东段,浅部矿点和规模较大的铀矿带大部分已得到揭露。为了扩大基地外围铀资源潜力,同时对矿区铀矿床深部第二富集带进行探寻,在红山子铀矿床地区开展音频大地电磁测量和地面高精度磁法测量等综合物探方法。共推断通过L10和L12线的断裂3条,其地表位置和深部延伸情况与钻探揭露情况吻合;地面高精度磁测共推断出断裂35条,并能圈定与铀成矿有密切关系的粗面岩的分布范围。根据区内已知铀异常点、带的分布,结合钻孔资料,总结了铀矿成矿有利地段的地球物理找矿模式,经后期钻探验证,取得了较好的找矿效果。在铀矿床外围进行"攻深找盲"时,利用综合物探方法及地球物理模式综合找矿,可以起到事半功倍的效果,为新一轮铀矿勘查提供有力手段。Hongshanzi uranium deposit is located in the northeastern part of Guyuan-Hongshanzi uranium metallogenic belt,and most of shallow occurrences and large-scale uranium belts have been exposed.In order to expand the potential of uranium resources around the base and explore the deep second enrichment zone of uranium deposits in the mining area,comprehensive geophysical methods such as audio-frequency magnetotelluric survey and high-precision magnetic survey were carried out in Hongshanzi uranium deposit area.It is inferred that there are 3 faults passing through L10 and L12 lines,and their surface position and deep extension are consistent with those revealed by drilling.A total of 35 faults can be inferred by high-precision magnetic survey on the ground,and the distribution range of trachyte closely related to uranium mineralization can be delineated.According to the distribution of known uranium anomalies and zones in the area,combined with drilling data,the geophysical prospecting model of favorable areas for uranium mineralization is summarized,and good prospecting results have been obtained after later drilling verification.When"striking deep and looking for blindness"in the periphery of uranium deposits,comprehensive prospecting with geophysical methods and geophysical models can get twice the result with half the effort and provide a powerful means for the new round of uranium exploration.

关 键 词：铀矿 音频大地电磁 高精度磁法 找矿潜力 红山子地区 大兴安岭 

分 类 号：P591[天文地球—地球化学] P618.51[天文地球—地质学]