Characteristic analysis and applied experiment of three-component dipole TEM forward simulation
WU Jun-Jie1,2, WANG Xing-Chun2, YANG Yi2, ZHANG Jie2, Deng Xiao-Hong2, Yang Qi-an3
1. College of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, China;
2. Institute of Geophysical and Geochemical Exploration, CAGS, Langfang 065000, China;
3. Qinghai No. 5 Geological and Mineral Exploration Institute, Xining 810028, China
In consideration of the characteristics of dipole array TEM, This paper gives three-component response of thick plate models with three-dimensional forward modeling software and summarizes the characteristics of TEM curves. The calculation results show that the horizontal component can show the edge and position of the anomaly body, while the vertical component can show the center. Multi-component survey can offer more reliable information and provide more evidence for interpretation of field data.
[1] 牛之琏.时间域电磁法原理[M].长沙:中南大学出版社,2007.[2] 蒋邦远.实用近区磁源瞬变电磁法勘探[M].北京:地质出版社,1998.[3] 刘长胜,林君,嵇艳鞠,等.瞬变电磁法偶极装置模型试验研究[J].物探与化探,2006,30(5):430-434.[4] 李惠云,赵玉辉.矿井偶极瞬变电磁技术的应用效果与改进[J].中国煤炭,2015,40(5):37-40.[5] 沈连金.轴向偶极装置在局部良导体上的感应耦合模型实验[J].物探与化探,1983,7(2):120-125.[6] Zhou N N,Xue G Q,Wang H Y. Comparison of the time-domain electromagnetic field from an infinitesimal point charge and dipole source,applied geophysics[J].Applied Geophysics,2013,10(3):349-356.[7] 吴小平,吴云鹏.非零长线源与偶极源的电磁响应比较分析[J].地球物理学进展,2012,27(6):2602-2608.[8] 徐锦山,雒志峰.时域激电单极—偶极数据转换为偶极—偶极测深数据及其二维反演对比[J].物探化探计算技术,2010,32(6):621-628.[9] 武军杰,张杰,王兴春,等.基于等效磁偶极子的定源回线瞬变响应计算方法及视电阻率定义[J].煤田地质与勘探,2013,141(3):68-71.[10] 戚志鹏,李貅,郭文波,等.瞬变电磁水平分量视电阻率定义[J].煤炭学报,2011,36(S1):88-93.[11] 武军杰,王兴春,邓晓红,等. 定源回线瞬变电磁x分量视电阻率计算方法[J].物探与化探,2012,36(4):684-687.[12] 薛国强,李貅,底青云.瞬变电磁法理论与应用研究进展[J].地球物理学进展,2007,22(4):1195-1200.[13] 李世金,孙丰月,高永旺,等.小岩体成大矿理论指导与实践——青海东昆仑夏日哈木铜镍矿找矿突破的启示及意义[J].西北地质,2012,45(4):185-191.