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The Second Annual Work Meeting and Field Work Inspection of “Exploration of Seismic Active Faults in China - North Segment of the North-South Seismic Belt” Project Were Completed with Success

2016/12/29 14:24:47

Exploration of Seismic Active Faults in China - North Segment of the North-South Seismic Belt, a special scientific research project of the seismological industry is the third phase of China’s large-scale active fault mapping, also the largest phase. The project spans from the common border of Shaanxi, Gansu, Sichuan and Qinghai to the common border of Shaanxi, Gansu and Ningxia and also covers most segments of Hexi Corridor. In order to comprehensively check the progress of the project, urge the implementation of the project according to the schedule and assure completion quality of the project, the Institute of Geology (IGL), under the entrustment of CEA Earthquake Damage Prevention Department, organized related experts to hold the second annual work meeting of “Exploration of Seismic Active Faults in China  - North Segment of the North-South Seismic Belt” project  in Lanzhou, Gansu on September 6~7, 2016 on the basis of the first annual work meeting. During the conference, the work of 15 subprojects in the second batch were reported and checked and field inspection and verification was conducted on the subprojects (the second batch) in the southeast of Gansu. Deputy Director Li Yishi, Division Chief Zhang Liming and Leng Wai of CEA Earthquake Damage Prevention Department were present and guided the work at the meeting. Researcher Xu Xiwei of CEA Institute of Geology - the general leader of the project, members of the inspection expert panel, subproject leaders and some technical backbones in total of more than 50 people attended the annual work meeting.

Fig. 1. Venue of the annual work meeting of the project

At this interim work meeting, the subproject leaders reported the implementation status of the project in details and consulted attending experts about the technical problems they encountered during work. At the meeting, experts and attendees spoke actively and discussed common problems of the subprojects with enthusiasm. The attending experts pointed out the current shortfalls of work progress of the project, provided pertinent and guiding opinions and suggestions, seriously analyzed and discussed existing problems of some subprojects, and clarified the direction of attention and key breakthroughs during implementation of the project in the future.

After the interim work meeting, the project organized an expert panel consisting of leaders of the competent department - CEA Earthquake Damage Prevention Department, the general leader of the project and related experts. The expert panel went to southeast Gansu, a key area of this mapping work and carried out four days’ on-site inspection on field work of some subprojects from September 8 to September 11. On field sites, the expert panel listened to the introduction and report of subprojects on field work, analyzed and discussed related problems and geological phenomena in details, pointed out problems and provided opinions and suggestions on work as well as the concrete implementation plan for the work in the next step, such as: fine surveying and mapping of typical landform points by new surveying and mapping technologies, location selection of paleo-earthquake research, division of mapping units, and refinement of geographic structure of faults.

Fig. 2. The expert panel and some subproject team members checked field work

Fig. 3. The expert panel and some subproject team members discussed tectonic land phenomena

At this annual work meeting, in respect to the problems and technical difficulties universally existing in mapping work, the expert panel encouraged all subproject teams to solve problems by new technologies and new means, such as: interpretation of high-resolution satellitic photos and aerial photos, and surveying and mapping by unmanned aerial vehicle; during field inspection, the expert panel despite of the scorching sun fastidiously explored geological landform of the faults, analyzed the fault structures and paleo-earthquake events in the exploratory trenches, and guided the selection of positions of exploratory trenches. This annual meeting and field inspection promoted project progress, assured project completion quality and laid a solid foundation for final acceptance of every subproject and the project.