The Late Triassic seismic soft sedimentary, deformation and its event significance in the west margin of Chuxiong Basin

Seismites are the important recorder of ancient earthquake. Seismites were recognized from foreslope turbidity facies Luojiadasha Formation rocks, in west margin of Chuxiong Basin. Based on the observation of field outcrop and thin section of the Luojiashan Formation, the identification marks of the Late Triassic seismites in the western margin of the Chuxiong Basin were summarized. The seismicity structure of the in-situ phase is divided into brittle seismotectonic type and soft deformable seismotectonic type, including stepmicro-faults, seismo-folds, brittle, brittle ductile structure, tearing structure, self-fragmental breccia, mixed slip layer, liquefied curl deformation, pillow structure, disc structure, liquefied, liquefied veins, sand volcano, flame-shaped structure, load structure and bead structure flow seismites rocks. Based on the study of stratigraphic column, seismite sequence has been created. It is of important significance for the study of tectonic evolution and the times of faulting basin and guarding the exploration of oil-gas in the Chuxiong Basin.