庐枞火山岩盆地南部拔茅山铜矿深部找矿潜力分析

Deep ore prospecting potential analysis of Bamaoshan copper deposit in southern Luzong volcanic basin

位于庐枞火山岩盆地南部的拔茅山铜矿,是细脉带蚀变岩型脉状铜矿的代表。研究表明,其深部具有斑岩型铜矿的勘探潜力。为了进一步明确其深部找矿潜力,针对研究区斑岩型、热液型铜多金属矿的岩体、断裂、接触带等主要控矿因素,利用高精度磁法和可控源音频大地电磁测深(CSAMT)成果,分别对拔茅山岩体的分布、产状和深部形态及其与围岩的接触带特征进行了剖析。在此基础上,通过与沙溪斑岩铜矿地质、物探异常特征的类比,指明了研究区的找矿方向和有利找矿部位,为进一步找矿提供了思路和依据。

The Bamaoshan copper deposit,located in the south of Luzhong volcanic basin,is the representative of vein belt altered rock type copper deposit.Previous researches showed that the deep part of this area has the potential for porphyry copper deposits.In order to further clarify the ore-prospecting potential in the deep part of this area,the authors have focused on the main ore-controlling factors of porphyry and hydrothermal copper deposits in this area,including rock masses,fractures,and contact zones.High-precision magnetic methods and controlled source audio magnetotelluric sounding(CSAMT)results were utilized to analyze the distribution,occurrence,deep-seated morphology,and characteristics of the contact zone with surrounding rocks.Base on there researches,through the analogy with the geological and geophysical anomaly characteristics of the Shaxi porphyry copper deposit,the authors pointed out the prospecting direction and favorable prospecting sites in the study area,which could provide some ideas and basis for further prospecting.