物化探方法在浅覆盖区找矿工作中的应用效果

Application of geophysical and geochemical prospecting methods in shallow overlay areas

由于浅覆盖区特殊的地质景观,传统找矿方法难以直接获取地层、岩体、构造、矿产(化)等地质体信息,造成地质认识水平整体不高,最终影响找矿效果。本文以大兴安岭中北段东坡马场沟一带找矿工作为例,探讨利用物化探方法(地面高精度磁测、极化激发法、土壤测量)解译断裂构造、圈定岩体及矿化蚀变带、大致判别矿产种类,逐渐缩小找矿范围,最终查明矿(化)体的位置,发现金矿点1处、金矿化点2处、铅锌银矿点1处,取得了较好的找矿效果。

Because of the special geological landscape in shallow cover area,it is difficult for traditional prospecting methods to obtain geological body information directly,such as strata,rock mass,structure,mineral resources (mineralization) and so on,which results in the low level of geological cognition and finally affects the prospecting effect.Taking the prospecting work in the eastern slope of the middle and northern Da.Hinggan Mountains as an example, this paper discusses the interpretation of fault structures and delineation of rock masses and mineralized alteration zones by using geophysical and chemical prospecting methods (high precision magnetic survey on the ground,polarization excitation method,soil survey). by roughly distinguishing the mineral types and gradually narrowing down the prospecting range,The location of ore body(or mineralized body) is founded out finally.It is found that One gold ore site,Two Au Mineralization sites and One Pb-Zn-Ag ore site,and a good prospecting effect has been obtained.