双频激电法在西藏抱布德铅锌矿勘探中的应用

Application of double frequency induction in the exploration of lead-zinc deposit: A case of Baobude deposit in Tibet

抱布德矿区为班公湖—怒江缝合带和拉竹龙—金沙江缝合带成矿区域上一个典型铅锌矿床。本文对双频激电法应用在铅锌矿找矿中的效果进行了分析探讨,认为抱布德矿区内物探异常具有较高视幅频率、视电阻率的特点,一般找矿价值较高。据此研究成果,成功在矿区圈定激电异常区域,并为钻探工作提供技术支撑,使矿区找矿成果达到了中型铅锌矿床规模(矿石资源量266. 27万t)。同时也说明高海拔区域采用双频激电法找铅多金属矿床也可以取得较好的效果。

The Baobude mining area is a typical lead-zinc deposit on the metallogenic area of the Bangong Lake-Nujiang suture zone and Lazhulong-Jinshajiang suture zone. This paper analyzes and discusses the effect of the dual-frequency IP method in the lead-zinc ore prospecting. It is considered that the geophysical anomalies in the Baobud mining area have higher prospective frequency and higher apparent resistivity. Based on the research results,the IPR anomaly area was successfully delineated in the mining area,and technical support was provided for the drilling work,so that the prospecting results of the mining area reached the scale of a mediumsized lead-zinc deposit. At the same time,it also shows that using double frequency induced polarization method to find lead polymetallic deposits in high altitude areas can also achieve better results.