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Division of Solid Earth Geophysics and Deep Structure Studies

2014/5/18 21:14:54

Supported by the Seismic Array Center and Electromagnetic Research Center as well as with advanced seismic array observation technology and electromagnetic technology, the Division dedicates to probing seismogenic structure, fine velocity structure, electrical structure and stress field distribution features of crust and upper mantle by means of mobile broadband seismic arrays observation technology and electromagnetic sounding method. Its work includes measuring the changes of electrical and velocity structure of crustal media via extremely low frequency seismic electromagnetic pre-monitoring technology, the integrated satellite-space-earth seismic electromagnetic monitoring system and repeatable seismological probing method; makes broadband seismic arrays observation and magnetotelluric sounding; studies the composition and three-dimensional medium parameters of the upper mantle of continental crusts and builds three-dimensional structural model, so as to lay foundation for the research on spatial array patterns of active tectonics, relationship between deep and shallow structures and seismic dynamics, provide three-dimensional framework and dynamic models for earthquake monitoring and prediction with physical significance and take the lead in the research on seismotectonics.

Deputy Director: Chen Jiuhui (take charge of routines)    Tel: 62009059

Deputy Director: Chen Xiaobin                                         Tel: 62009011

Subject groups

1.      Array seismology

Major research interests: Take advantage of mobile broadband seismic arrays observation technology to probe for seismogenic structure at quake-prone regions and fine velocity structure of upper mantle, electrical structure, stress field distribution features and changes at the hotspots of geodynamics; provide deep-seated structures, scales of deformation and dynamic environments for the research of earthquake and geodynamics.

Members: Chen Jiuhui (team leader), Guo Biao, Hao Zhongtao, Li Lei and Li Yu

2.      Seismo-electromagnetics

Major research interests: 1) comprehensive probing for electrical structure: develop comprehensive probing technique for deep, middle and shallow electrical structure and shallow seismic velocity structure; play a vital role in probing for deep-seated structure and active fault at the focal zone; provide geophysical prospecting evidence for the research on seismogenicmechanism and zoning of quake-prone regions; 2) extremely low frequency seismo-electromagnetics: complete the construction of earthquake prediction subsystem of Extremely Low Frequency Engineering Project, which pertains to the key national infrastructure projects; develop extremely low frequency and satellite-supported new seismic electromagnetic monitoring technology.

Members: Tang Ji (team leader), Chen Xiaobin and Wang Lifeng

3.      Deep-seated electrical structure

Major research interests include:

(1) Electromagnetic methods and scientific seismic research - research on such calamity as earthquake and volcanoes by means of static electromagnetic deep-seated structural probing and dynamic electromagnetic observation.

Make static probing for deep-seated seismogenic environment at active seismic regions (strong seismic regions at the rim of Qinghai-Tibet Plateau) and segmental structure at major seismically active belts (Xihaiyuan-Haiyuan-Liupanshan fracture zone, Longmenshan active tectonic zone and Aerjin fracture zone) as well as study the electrical features at deep-seated structure and dynamic environment, etc at these regions by means of electromagnetic surveying technology; make dynamic observation on ground resistivity structure and changes of electromagnetic fields at the active tectonic regions, and then study whether these changes are connected with earthquake and the contributing factors by means of the electromagnetic observation technology with natural source and extremely low frequency electromagnetic observation technology with artificial source; make the study of earthquake disaster and seismic dynamics based on the findings from the observation of deep-seated electrical and electromagnetic structure.

(2) Transitional electromagnetic methods and the application study in the fields of metal mines, resources and coal deposit, etc.

Further develop the software for data processing and interpretation of transitional electromagnetic method; make a joint study of time domain-based transitional electromagnetic method and frequency domain-based earth electromagnetic method; push forward the application study of transitional electromagnetic method in the fields of metal mines and resources, etc.

Members: Zhan Yan (team leader), Xiao Qibin and Wang Jijun