Horizontal slices and latitude sections of the 3-D lithospheric model of the North China Craton inverted with magnetotelluric array data

To map the resistivity structure and discuss the destruction of the North China Craton, we inverted 870 stations of magnetotelluric (MT) array data in a period range of 0.01~10,000 s using ModEM. These data were collected from 2010 to 2012 by China University of Geosciences Beijing. MTU-5A and Lemi-417 instruments were used to collect broadband and long-period data, respectively. Broadband and long-period Data were processed using SSMT2000 and Varentsov’s code, respectively, giving the broadband data a period range of 0.003 ~ 5,000 s and the long-period data a period range of 10 ~ 10,000 s. The folder “./ Coordinates” contains two files: “All stations.txt”, coordinates of all inverted MT stations in Longitude/Latitude format; “LMT.txt”, coordinates of all inverted long-period MT stations. The folder “./ Latitude Sections” contains resistivity sections cut from the 3-D resistivity model along latitudes in X(km)/Y(km)/Log10(rho) format. The folder “./ Horizontal Slices” contains horizontal resistivity slices cut from the 3-D resistivity model at some depths in Longitude/Latitude/Log10(rho) format.

为绘制电阻率结构分布图并探讨华北克拉通的破坏机制，我们利用ModEM软件对870个大地电磁（magnetotelluric, MT）台站的阵列观测数据开展反演，反演所用的周期范围为0.01~10000秒。上述数据由中国地质大学（北京）于2010至2012年采集。研究分别采用MTU-5A与Lemi-417仪器采集宽频与长周期大地电磁数据，其中宽频数据通过SSMT2000软件处理，长周期数据通过Varentsov编写的代码处理，最终得到的宽频数据有效周期范围为0.003~5000秒，长周期数据有效周期范围为10~10000秒。本数据集包含三个子文件夹：
1. ./Coordinates 文件夹：内含两个数据文件，分别为记录所有反演用MT台站经纬度坐标的"All stations.txt"，以及记录所有反演用长周期MT台站经纬度坐标的"LMT.txt"；
2. ./Latitude Sections 文件夹：包含从三维电阻率模型中沿纬度方向截取的电阻率剖面数据，文件格式为X(km)/Y(km)/Log₁₀(ρ)；
3. ./Horizontal Slices 文件夹：包含从三维电阻率模型中按特定深度截取的水平电阻率切片数据，文件格式为经度/纬度/Log₁₀(ρ)。