Present-day Crustal Deformation in Arc-Continent Collision Zone of the Southeastern Eurasia Plate

Based on the systematic collection of the GPS observations in China:Fujian, China:Taiwan and Philippine:Luzon, this paper obtains the current crustal horizontal velocity field of the arc-continent collision zone. Targeting the specific areas whose super-long span is more than 1000 km, this paper builds the least squares collocation model on the basis of ellipsoidal coordinates, uniformly calculating current GPS strain distribution of this collision zone. The results show that china:Taiwan province has the strongest crustal deformation, followed by Philippine:Luzon and China:Fujian regions respectively. The Philippine sea plate at the east Taiwan, China collides intensively with the Eurasia plate, and the collision is severely consumed through the central mountain's uplifting, the thrust napping and the tectonic escaping. The overall deformation characteristics is closely related to the structural variation of the Philippine sea plate. While the relative deformation in Luzon region is mainly involved with the relative sliding of the Philippine fault.