引用本文: OURO-DJOBO SEDIKOU B., 魏文博, 叶高峰, 金胜, 景建恩, 姬磊喆, 董浩, 张乐天, 尹曜田, 谢成良. 2018. 华北大地电磁测深阵列观测实验与岩石圈导电性快速成像模型. 地球物理学报, 61(6): 2508-2524, doi: 10.6038/cjg2018L0695 OURO-DJOBO SEDIKOU B., WEI WenBo, YE GaoFeng, JIN Sheng, JING JianEn, JI LeiZhe, DONG Hao, ZHANG LeTian, YIN YaoTian, XIE ChengLiang. 2018. Experiments of magnetotelluric observation network on North China and lithospheric conductivity structure from fast imaging method. Chinese Journal of Geophysics (in Chinese), 61(6): 2508-2524, doi: 10.6038/cjg2018L0695 Citation: OURO-DJOBO SEDIKOU B., WEI WenBo, YE GaoFeng, JIN Sheng, JING JianEn, JI LeiZhe, DONG Hao, ZHANG LeTian, YIN YaoTian, XIE ChengLiang. 2018. Experiments of magnetotelluric observation network on North China and lithospheric conductivity structure from fast imaging method. Chinese Journal of Geophysics (in Chinese) , 61(6): 2508-2524, doi: 10.6038/cjg2018L0695 作者简介:

OURO-DJOBO SEDIKOU B, 男, 1982年出生, 多哥人, 留学生, 博士研究生, 主要从事大地电磁测深方法技术和应用研究.E-mail: [email protected]

通讯作者: 魏文博, 男, 1945年出生, 教授, 主要从事电磁探测方法理论和地球深部结构与动力学过程教学及研究.E-mail: [email protected]

中图分类号: P317;P318

关于中国大陆岩石圈导电性结构研究越来越引起人们的重视，而目前研究大陆岩石圈导电性结构的主要方法是大地电磁测深（Magnetotelluric sounding）.为此，在国家项目"深部探测技术与实验研究（SinoProbe）"专项里开展了"大陆电磁参数标准网实验（SinoProbe-01）"研究，完成了华北1°×1°地理坐标网度的大地电磁测深"标准点"阵列（Array）观测.本文详细论述了华北SinoProbe-01项目1°×1°MT"标准点"阵列观测实验的概况，以及通过精细的MT数据处理和一维Niblett-Bostick变换快速成像，所获取的华北地区岩石圈导电性三维成像模型.在分析华北岩石圈导电性结构特征的基础上，从电性结构角度把华北与邻区岩石圈划分为胶辽、燕山、鲁西、太行—吕梁等低导电性（高电阻率）块体，内蒙古、阿拉善和祁连中等导电性块体和黄淮、鄂尔多斯、秦岭良导电性（低电阻率）块体，进一步从导电性的角度证实了华北克拉通是由多个块体集合而成的观点.

华北岩石圈 大地电磁测深“标准点”阵列 Niblett-Bostick变换 导电性结构 Abstract:

The electrical resistivity structure beneath the continent of the Chinese Mainland has triggered worldwide concerns during recent several decades. The main geophysical method of surveying electrical structure of continental lithosphere is Magnetotelluric sounding (MT). Therefore, in the project SinoProbe-01 (i.e., Experimental Study of the Continental Standard Grid of Electromagnetic Parameters) belonging to the national research program SinoProbe (Deep Exploration Tecnology and Experimental Research of China), we have deployed 1°(Latitude)×1°(Longitude) standard MT array covering the entire North China. In this paper, we introduce the general situation of SinoProbe-01. In addition, we achieved the electrical resistivity structure of lithosphere beneath North China through fine data processing and rapid imaging by 1-D Niblett-Bostick transform. Based on the analysis of the lithospheric resistivity structure, the lithosphere beneath North China and its adjacent regions can be divided into several high-resistivity blocks (e.g., Jiaoliao, Yanshan, Luxi and Taihang-Lüliang), mid-conductivity blocks (e.g., Inner Mongolia, Alxa and Qilian) and low-resistivity blocks (e.g., Huanghuai, Ordos, Qinling). This observation further confirm the previous inference that the North China craton was formed though amalgamation of multiple micro-continental blocks.

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Apparent resistivity and phase curves of the 10839 central station and its auxiliaries stations belonging to the North China 1°×1° MT array

Figure 6.

The data quality classification map of the North China SinoProbe-MT observation network

Figure 7.

Crustal thickness contour map of the North China Craton ( He et al., 2013 )

Figure 8.

Apparent resistivity map of the North China at different frequency

Figure 9.

Theorical penetrating depths of the 2000 s magnetotelluric signals of the North China Sinoprobe MT array

Figure 10.

"Checkerboard" model tests for the 1-D N-B fast resistivity imaging

Figure 11.

Three-dimensional conductivity Structure of North China lithosphere using N-B transform

Figure 12.

Topographic map of North China

Figure 13.

The North China tectonic map ( Zhao et al., 1998 , 2001 )

Figure 14.

Tectonic framework of North China and adjacent areas divided based on the lithospheric electrical structure