重磁方法技术在李家地钨矿外围低磁性隐伏岩体成矿预测中的应用研究

ON APPLICATION OF GRAVITY AND MAGNETIC METHODS IN PROGNOSIS OF MINERALIZATION OF LOW-MAGNETISM CONCEALED ROCK MASSES IN THE PERIPHERY OF THE LIJIADI TUNGSTEN DEPOSIT

通过在赣南李家地钨矿外围开展1∶50000高精度磁测工作,对隐伏岩体分布范围进行划分,新发现4条北西向断裂。在工作区中,发现成矿有利的低磁性、低密度隐伏花岗岩岩体;根据周边已有钨矿矿点分布及成矿特征,推断该花岗岩岩体浅部受北东向断裂控制,深部受北西向断裂控制,岩体与下坊组及上施组接触带应为主要成矿部位。本文为李家地钨矿外围找矿预测提供了基础地球物理信息,也为同类型地区寻找隐伏花岗岩岩体提供了参考依据。

The distribution range of concealed rock mass was divided and four new NW faults were found on the basis of 1:50000 high-precision magnetic survey in the periphery of the Lijiadi tungsten deposit in southern Jiangxi.A concealed granite mass with low magnetism and low density which are favorable for mineralization was discovered in the working area.According to the distribution of the nearby known tungsten ore occurences and metallogenic characteristics,it can be inferred that the granite rock mass is controlled by NE fault in the shallow part and NW fault in the deep part,and the contact zone between the rock mass and the Xiafang and Shangshi Formations should be the main metallogenic site.This paper provides basic geophysical information for ore prognosis in the periphery of the Lijiadi tungsten deposit,and also provides a reference for the exploration of concealed granite rock masses in the areas of same type.