综合物探在西藏仲巴县帮布勒地区找矿中的应用和意义

Application and Significance of Integrated Geophysical Prospecting in Bangbule Area,Zhongba County,Tibet

帮布勒矿床为近年来新发现的矽卡岩型铅锌铜铁矿床,地表圈定铅锌铁矿(化)体76个、铜矿(化)体2个,矿体地表长10～480m,平均厚度0.75～30m,成矿岩体为石英斑岩,矿体主要产于石英斑岩与大理岩、灰岩、砂岩的接触带以及大理岩、灰岩的层间分界面等。在该矿区实施了1∶10 000地面高精度磁测和1∶10 000激电中梯测量、激电测深工作,综合利用磁法和电法,总结了本区主要铅锌铜铁矿(化)体的地球物理找矿标志,控制了岩体与围岩接触带以及大理岩、灰岩层间分界面,通过激电测深二维极化率反演推测了矿(化)体在地下空间的展布形态,结合矿区地质特征,进行了成矿预测,有效地指导了帮布勒矿区的深部找矿工作。

Bangbule deposit is a newly discovered large-scale Pb-Zn-Cu-Fe deposit in recent years.There are 76 Pb-Zn-Fe ore bodies and 2 Cu bodies on the surface.The surface length of the ore body is 10-480 m with an average thickness of 0.75-30 m.The ore-bearing rock mass is quartz porphyry.The ore body is mainly produced in quartz porphyry and marble,limestone,sandstone contact zone and marble,limestone interlayer interface.In this study,1∶10 000 high precision magnetic measurement and the IP measurement of the ladder were conducted,and the IP sounding was laid out in Bangbule Pb-Zn-Cu-Fe mining area.This study then summarizes the geophysical prospecting signs of the main Pb-Zn-Cu-Fe ore bodies in the study area by geophysical methods.The contact between the rock mass and the surrounding rock and the interbedment of the formation are controlled,and the distribution of the objects in the underground space is deduced.Combining with the geological characteristics of the mining area,the study implemented the mineralization prediction,which effectively guides the prospecting work in this area for good exploration results.