Paleomagnetic study was carried out with the 96 samples (from 12 sites) collected from the Cretaceous red sandstone strata on the two wings of the Dadeli syncline, southwest of Xichang, in the Sichuan_Yunnan rhomboidal block.

Correlation of Seismicity in Sichuan-Yunnan Rhombic Block;

By the result of data-processing and compiling of geophysics, including regional gravity survey, aeromagnetic survey, deep reflect imagine of seismic and natural seismic, it is discovered that there exists a rhombic block, Chuan-Dian-Qian Rhombic Block(Chuan, Dian and Qian is the short name of Sichuan, Yunnan and GuiZhou, respectively), which is surrounded by four faults in various directio.

Structural Transformation and Strain Partitioning along the Northeast Boundary Belt of the Sichuan-Yunnan Block;

With the measuring technology of photogrammetry and chronological method of analysis among regional climate,geomorphology and tectonics,we get a set of quantitative kinematical data for the main faults along the northern-eastern active boundary belt of Sichuan-Yunnan block.