辽东连山关岩体接触带物探异常组合特征与深部找矿预测

Geophysical anomaly combination characteristics and deep prospecting prediction in the contact zone of Lianshanguan rock mass in eastern Liaoning

连山关岩体与其围岩呈沉积不整合接触,该接触带是连山关地区一条重要的控矿构造。这里主要从控矿构造的物探异常特征分析入手,通过对研究区航空磁法测量、音频大地电磁测量、土壤氡气测量等成果资料的综合分析,并结合钻探揭露地质资料的对比,基本厘清了岩体接触带的物探异常特征。研究结果表明,接触带在航磁△T等值线平面图中表现为中弱磁特征,在反演电阻率断面上表现为明显的等值线梯度带特征,在氡浓度剖面上表现为明显的高值异常特征。根据物探异常特征,经后期钻孔证实,在氡浓度异常区深部接触带突起部位均发现工业铀矿化。

The Lianshanguan rock mass,in unconformity with its surrounding rocks,is an important ore-controlling structure in Lianshanguan area.Based on the analysis of the geophysical anomaly characteristics of ore-controlling structures,the geophysical anomaly characteristics of rock mass contact zone are basically clarified through the comprehensive analysis of the results of aeromagnetic measurement survey,audio-frequency magnetotelluric survey and soil radon measurement in the study area,and the comparison of geological data is revealed by drilling.The results show that the contact zone exhibits a medium weak magnetism in the aeromagnetic△T isoline plan,and a distinct contour gradient on the resistivity profile and a significant high-value anomaly on the erbium concentration profile.According to the characteristics of geophysical anomalies,industrial uranium mineralization was found in the deep contact zone of the anomalous sputum on centration zone.