摘要
核桃坝地区位于内蒙古锡林郭勒盟多伦县,是我国近年来在北方发现的少数火山岩型铀矿床之一,铀矿找矿工作取得较大突破,但矿体埋深大都在500 m以下。为查明控矿构造,寻找隐伏铀矿体,扩大找矿成果,通过开展大功率激电中梯扫面工作,圈定了4片激电异常区,确认主体构造方向为近南北向。分析激电测深异常断面特征,结合该区已有地质、物探资料,查明了断裂构造分布特征。研究认为核桃坝地区具备较好的铀成矿条件,深部可能存在多处隐伏铀矿(矿化、异常)体。经过钻孔验证,在钻孔深部中发现了铀工业矿体和构造破碎带,证实大功率激电测量在寻找隐伏构造方面效果良好,可为类似矿产勘查提供很好的借鉴。
The Hetaoba area,which is located in Duolun Count of Xilin Gol League,Inner Mongolia,is one of the few volcanic uranium deposits discovered recently in the north of China.Great breakthroughs have been made in uranium prospecting here,but most of the ore bodies are buried below 500 meters.In order to identify the ore control structure,find the hidden uranium ore body,and expand the prospecting results,four patches of induced polarization(IP)anomaly are delineated by conducting high power IP mid-step scanning,and the main structural direction is confirmed nearly south to north.Based on the abnormal section characteristics of IP sounding and the existing geological and geophysical data in this area,the distribution characteristics of fault structure are roughly identified.It is believed that the Hetaoba area has good uranium mineralization conditions,and may contain many hidden uranium deposits(mineralization and anomalies)in the deep part.Drill validation has identified uranium industrial orebodies and structural fracture zones in deep boreholes,confirming that high-power IP surveys are effective in finding hidden structures,which can provide a good reference for similar mineral exploration.
作者
李喜彬
史贵兵
蒋孝君
Li Xibin;Shi Guibing;Jiang Xiaojun(Geologic Party No.208 of CNNC,Baotou Inner Mongolia 014010,China)
出处
《工程地球物理学报》
2024年第3期416-424,共9页
Chinese Journal of Engineering Geophysics
基金
中国核工业地质局项目(编号:202204-1)。
关键词
核桃坝
大功率激电测量
铀矿勘查
Hetaoba area
high-power induced polarization measurment
uranium exploration
