摘要
银坑牛形坝矿区隐爆角砾岩型的成矿模式是亟需研究突破的重要课题,探索研究区内隐伏的隐爆角砾岩体的空间形态特征则是首先要解决的问题。通过分析区内岩石物性资料,隐爆角砾岩体相对围岩的电性差异及弱磁反应,采用以可控源音频大地电磁测深(CSAMT)为主并结合磁测的技术手段查明研究区内隐爆角砾岩体的空间分布。结果表明,CSAMT对隐爆角砾岩体具有较好的反映效果,显示地表出露的两处爆破角砾岩体在深部构造上同根,且隐爆角砾岩筒往深部横截面逐渐变大。根据CSAMT反演成果,利用Voxler软件,建立了隐爆角砾岩体的隐伏三维空间形态,为该区下一步勘查工作提供了有利的依据。
The metallogenic model on cryptoexplosive breccia in Niuxingba ore district is an important subject needed to be researched badly. And the prime problem is to study the spatial morphological characteristic of concealed cryptoexplosive breccias bodies. Based on the analysis of rock physical properties, along with the electric property difference and weak magnetic response of the cryptoexplosive breccias relative to surrounding rocks, the controlled source audio-frequency magnetotellurics（CSAMT） method combining with magnetic survey are carried out in the study area to identify the spatial distribution of the cryptoexplosive breccias. The results show that the CSAMT method responds effectively to cryptoexplosive breccias. Two surface cryptoexplosive breccias have the same root in the deep structure, and the cross section of cryptoexplosive breccias gradually becoming larger with the increasing depth. On the basis of the CSAMT inversion results, the three-dimension model of concealed cryptoexplosive breccias bodies was established by Voxler software, which provides significant geophysical basis for the next phase of geological prospecting.
出处
《东华理工大学学报（自然科学版）》
CAS
2016年第3期273-278,共6页
Journal of East China University of Technology(Natural Science)
基金
中国地质调查局项目"江西于都银坑-宁都青塘金银多金属矿整装勘查区关键基础地质研究"(12120114034801)
