A TYPE OF SPECIAL SHEAR-CRUSH GROUND FISSURES LOCATED IN SHANXI GRABEN SYSTEM

Tectonic background and modern stress field of the Shanxi garben system are formulated.The characteristics of the ground fissures developed in the area are generalized.Based on the investigation,a type of specific shear-crush ground fissures has been found.This ground fissure locates in E Mei Platform of the Shanxi garben system.It appears intensive shear and crush deformation-the ground and wall buckle and dislocate.This feature does not agree with other ground fissures developed in the area.According the features of ground fissures and region tectonic stress field,the formation mechanism of the special ground fissure has been discussed.