中高山区高精度航磁调查找矿效果研究  

Exploration effect of high precision aeromagnetic survey in mid-high mountains areas

作　　者：张洪瑞[1,2] 熊盛青[2] 范正国[2] 周道卿[1,2] 谭林[2] 曹宝宝[1] 

机构地区：[1]中国地质大学(北京),北京100083 [2]中国国土资源航空物探遥感中心,北京100083

出　　处：《地球物理学进展》2013年第4期2051-2059,共9页Progress in Geophysics

基　　金：国家基础研究973计划(2012CB416805);国家矿产评价专项(1212011120903)联合资助

摘　　要：随着矿产资源需求的不断加大,我国西部高山区利用高精度航磁技术开展矿产勘查的需求越来越高,本文以东昆仑、阿尔金等多个高山区实测资料为基础,通过对不同型号飞机性能进行对比,选择适合高山区航磁测量的飞行平台;结合理论模型计算与不同高度飞行试验,确定了高山区有效飞行高度;并在基础上开展了航地磁测量效果对比.在航磁资料精细解释方面尝试了曲面位场转换处理,对比了转换前后局部异常强度变化;针对高海拔地区弱小磁异常选编,开展了弱缓异常提取技术研究;并针对起伏地形条件下航磁异常2.5D/3D精细反演解释技术手段进行了尝试,就如何提高航磁资料找矿效果进行了积极的探索.With the increasing demand of mineral resources, high-precision aeromagnetic technology exploration in the high mountains of western China has become more and more important. In this paper, based on the measured data in high mountains such as east Kunlun mountain and Altun mountain, we compared performances of different types of aircrafts to choose the right flying platform; then we combined with theory model calculation and different altitude flight test to confirm flying height in high mountains; at last, comparison between aeromagnetic survey and geomagnetic survey has been made. Some active explorations are also made for improving the effect of prospecting by aeromagnetic data and several techniques of detailed interpretation are implemented, for instance, we tried the potential field conversion on curved surface and compared the anomalies before and after conversion intensity change; besides, we carried out the weak and slow anomaly extraction technology research in high altitude area to accentuate weak magnetic anomaly, and in the accidented relief condition we attempted on aeromagnetic anomaly 2. 5D/3D carful inversion to improve the aeromagnetic data to the prospecting effect.

关 键 词：中高山 高精度航磁 找矿效果 2 5D 3D反演 精细解释 

分 类 号：P631[天文地球—地质矿产勘探]