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西藏笛给铅锌矿隐伏岩体三维解析信号的磁异常处理 被引量:2

Magnetic anomaly processing on 3D analytical signalof concealed rock mass in Digei Pb-Zn deposit, Tibet
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摘要 矿区地理位置处于中高纬度地区,为了更好的探索中高纬度地区的磁异常分析方法,实现磁异常的快速评价,采用三维解析信号法以研究冈底斯成矿带东段笛给矿区地磁异常特征。通过化极磁异常、低通滤波异常等分析了磁异常的成因;采用切割场法确定隐伏岩体的概貌,利用磁异常三维解析信号振幅圈定了Y1、Y2两处隐伏岩体,利用其振幅值和其半宽估算隐伏岩体的顶部埋深,Y1岩体最大顶深208m,Y2岩体最大顶深179 m。研究成果对于该矿区隐伏岩体的揭示,能够更好地为地质工作者提供地球物理科学依据,具有较强的实用价值,可为相似地区的物探工作提供参考。 The geographical location of the mining area is in the middle and high latitude area.In order to explore the better analysis method of the magnetic anomalies in the middle and high latitude area and realize the rapid evaluation of the magnetic anomalies,this paper uses the 3D analytical signal method to study the characteristics of the geomagnetic anomalies in the Digei mining area in the eastern Gangdisi metallogenic belt.Based on the analysis of reduction to the pole and low-pass filtering anomalies,this paper analyzes the causes of magnetic anomalies,uses tangential method to determine the profile of the concealed rock mass.The 3D analytical signal amplitude of magnetic anomaly is applied to delineate Y1 and Y2 two concealed rock masses,its amplitude value and its half width are used to estimate the buried depth of the top of the concealed rock mass.The maximum top depth of Y1 rock mass is 208 m,and the maximum top depth of Y2 rock mass is 179 m.For the study of the concealed rock body here,it can provide a better geophysical scientific basis for geologists.The research results have a strong practical value for it can provide a reference for geophysical exploration in the similar area.
作者 张叶鹏 谢亮 严家斌 孔辉 刘灿娟 ZHANG Yepeng;XIE Liang;YAN Jiabin;KONG Hui;LIU Canjuan(Geological Team No.247 of Hunan Provincial Nonferrous Metals Geological Exploration Bureau,Changsha 410129,Hunan,China;School of Geosciences and Info-physics,Central South University,Changsha 410083,Hunan,China)
出处 《矿产与地质》 2020年第4期761-765,共5页 Mineral Resources and Geology
基金 国家重点研发计划“三维精细探测与深部矿体定位”(2018YFC0603903) 2018—2021专题“深部多方法多参数联合探测及反演解释技术”项目资助。
关键词 笛给铅锌矿 三维解析信号 磁异常 隐伏岩体 西藏 Digei Pb-Zn deposit 3D analytical signal magnetic anomaly concealed rock mass Tibet
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