安徽铜陵舒家店铜矿三维音频大地电磁探测研究

发布时间：2018-06-24 03:18

本文选题：斑岩型铜矿床 + 音频大地电磁法　；参考：《中南大学学报(自然科学版)》2017年04期

【摘要】：利用音频大地电磁法,对安徽省铜陵矿集区舒家店斑岩型铜矿床进行三维探测研究。对经过预处理的实测AMT数据利用相位张量进行维性分析;通过挑选适当的测点和频域数据,设计合理的参数,利用WSINV3DMT程序进行实测AMT数据3D反演,得到舒家店铜矿床的3D电性模型;利用模型响应与实测AMT数据的拟合对比对反演结果进行评价;利用不同深度、不同方向的空间切片讨论3D反演模型的电性结构特征。研究结果表明:该区深部2D/3D构造特征明显;所选反演模型整体精度较高,仅部分局部精度低;深部与代表岩体的高阻体相间共存的低阻体异常极可能是蚀变岩体或直接是矿体的反映。
[Abstract]:The Audio frequency magnetotelluric method was used to study the Shujiadian porphyry copper deposit in Tongling ore concentration area of Anhui province. The dimension of the pre-processed measured Zhang Liang data is analyzed by using phase Zhang Liang, and reasonable parameters are designed by selecting appropriate measurement points and frequency-domain data, and 3D inversion of measured AMTs is carried out by using WSINV3DMT program. The 3D electrical model of Shujiadian copper deposit is obtained, the inversion results are evaluated by the fitting comparison between the model response and the measured AMT data, and the electrical structure characteristics of the 3D inversion model are discussed by using different depth and different direction space sections. The results show that the deep 2D / 3D structure has obvious characteristics, and the inversion model has high overall accuracy and only partial local accuracy. The low resistivity anomaly, which exists between the deep and the representative rock mass, may be a direct reflection of the altered rock mass or the orebody.
【作者单位】：中南大学有色金属成矿预测教育部重点实验室;中南大学地球科学与信息物理学院;
【基金】：国家深部探测专项(Sino Probe-3) 国家自然科学基金资助项目(41574120,41174105) 国家高技术研究发展计划(863计划)项目(2014AA06A602)~~
【分类号】：P618.41;P631.325

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