INTERACTION BETWEEN PHILIPPINE SEA PLATE (PH) AND EURASIA (EU) PLATE AND ITS INFLUENCE ON THE MOVEMENT EASTERN ASIA

The present boundaries of the Philippine Sea plate with surrounding plates was given by the evolution history of the Philippine sea and the earthquake distribution around the Philippine sea. The deformation inside the Philippine Sea plate and along the boundary of PH EU was studied by comparising the observed data by the methods of Geophysics, Geology and GPS with the theoretical results calculated from Euler parameter of Philippine Sea plate. The interaction between the Philippine Sea and Eurasian plates was analyzed using the geophysical, geological and GPS data. It is shows that the interaction is different in different part of the boundary. There is stronger compression on Eurasian plate at Nankai trough, while there is no compression at Ryukyu trench where an extension may exist, caused by the secondary mantle flow. The collision of two plates in Taiwan area causes strong compression in southeast part of Chinese continent. There is a deformed belt in Philippine islands between Philippine Sea and Eurasian plates, so the interaction between the two plates is weakened and there is no influence on the southern China Sea from the Philippine Sea plate. [