激电中梯和激电测深在西藏强龙铜钼矿区中的应用研究

Application of IP Intermediate Gradient and Schlumberger Sounding on Qianglong Copper-molybdenum Mining Area,Tibet

西藏强龙铜钼矿区是近年来新发现的找矿靶区,前期综合调查表明区内具有良好的成矿条件,但矿(化)体的空间分布特征及其深部延伸情况不甚明确。为分析激电中梯和激电测深在西藏强龙铜钼矿区中的应用情况,在系统收集和分析研究区以往地质、矿产和化探资料的基础上,首先采用激电中梯法,圈定了3处重点异常(JD1、JD2和JD5),基本确定矿化蚀变带及矿化体的平面位置;继而通过激电对称四极测深法,大致查明了地表异常在地下半空间上的隐伏特征,圈定出深部极化体的埋深位置、产状及延伸。综合分析表明,激电中梯法与激电对称四极测深法相结合是有效的地球物理找矿方法,圈定的异常对本矿区深入开展地质找矿工作具有十分重要的指导意义。

Qianglong copper-molybdenum mining area in Tibet is a newly discovered prospecting target area in recent years.The previous comprehensive investigation shows that the area has good ore-forming conditions,but the spatial distribution characteristics and deep extension of the ore(chemical)body are not very clear.In order to analyze the application of IP mid-step and IP sounding in the Qianglong copper-molybdenum mining area in Tibet,based on the systematic collection and analysis of previous geological,mineral and geochemical data in the study area,this paper first delineates three key anomalies JD1,JD2 and JD5 by IP intermediate gradient,and basically determines the plane location of mineralized alteration zone and mineralized body,and then roughly finds out the hidden characteristics of surface anomalies in underground half-space by IP schlumberger sounding method,and delineates the buried location,occurrence and extension of deep polarized bodies.The comprehensive analysis shows that the combination of IP intermediate gradient and IP schlumberger sounding is an effective geophysical prospecting method,and the delineated anomalies have very important guiding significance for the further development of geological prospecting in the Qianglong area.