The compilation of 1∶500000 seismotectonic map of the Ordos active block and boundary zone

Abstract

The 1∶500000 seismotectonic map of the Ordos active block and boundary zone is a special achievement of the national key research and development project “Research on dynamic model and strong earthquake risk of Ordos active block boundary zone” . Taking the Ordos active block and boundary zone as the mapping scope, this map refers to the compilation standards and database standards of seismotectonic map in the seismic industry, and carries out high-resolution image interpretation on the basis of systematically collecting and collating geographic information, geology, active tectonics, earthquake, geophysics and other data. It absorbs the latest research results of the project and builds the basic database required for mapping. Through data vectorization, stratigraphic boundary modification, fault modification, map modification, the 1∶500000 seismotectonic map of the Ordos active block and boundary zone was compiled. This map reflects the boundary zone of Ordos active blocks such as Yinchuan Basin Helan Mountains, arc structure bundle, Weihe Basin, Shanxi graben system, Hetao Basin and the seismic structure of adjacent blocks, the geometric and kinematic images of active tectonics in the Ordos block and boundary zone were improved.

Keywords

• ordos
• active block
• block boundary zones
• seismotectonic map