| Through systematically, thoroughly studying theories and techniques of error correction, gravity field computation and geophysical interpretation for multi-satellite altimetry data, the dissertation has established a series of processing methods, which is realized in computer and applied to Geosat ERM, ERS- 1/2 and Topex/Poseidon altimetry data in the China marginal seas and its vicinity located between 0?50N~ 100?l500E . In order of depth and scale, plenty of information on submarine tectonics and geodynaniics in the interested region can be extracted from 4抶4?grid data models. These models include geoid undulation and its residual high- frequency components, gravity anomaly, other forms of geoid undulation or gravity anomaly, submarine topography, Moho discontinuity, stress field from various scales of mantle convection. Main achievements of the dissertation can be summed up as follows. On the basis of a complete dissection for ERS-l/2 OPR data structure and a single-satellite crossover adjustment for Geosat ERM, a dual-satellite crossover adjustment for ERS- 1/2 relative to TopexlPoseidon has been implemented in order to take advantage of two 168-day long cycles of ERS- 1 altimetry data. The sea surface topography is calculated and removed from geoid undulation according to oceanographic measurements and estimations. The stacking collinear average is excluded from modeling geoid undulation directly in the way of weighting grid interpolation for sea surface height, and it is applied to the along-track slope and direction instead of sea surface height in the process of calculating vertical deflection for gravity anomaly recovery. The remove-restore procedure of reference models is used to calculate gravity anomaly, submarine topography and Moho discontinuity, thus FF1?available in flowing window simplifying algorithm operation. These improvements above all efficiently guarantee precision and resolution of altimetry data. Matching with the privilege of geoid undulation in studying deep structural dynamics, not only gravity anomaly but also geoid undulation are corrected for global topography and isostacy, and their results are convenient for inversing Moho discontinuity and stress field from small scale of mantle convection respectively. The concept of mantle convection potential field is introduced to calculate stress field as easily as calculating vertical deflection. Various kinds of digital models from altimetry data have figured the tectonic and geodynamic pattern and features of the trench-arc-basin system in the interested region, such as spreading ridges different from common seamount chains, trench-arc tectonic trails hardy discovered by topography, difference of subducting function and its resistant compression occurring along different trench-arcs. Consistent with the rift of the Eurasian plate and the northwestward spread of the Pacific plate, the stress field from large scale of mantle convection displays a skeleton of dumbbell shaped with sinistral compresso-shear at the north, dextral compresso-shear at the south and slip in the middle. Energy converge strong at the south is attributed to the northward movement of the Indian ocean. The stress fields from middle and large scales of mantle convection may jointly lead to the northwestward rifling of Japan, the southeastward rifling of Sea South China Sea, and specific tectonic features of the Ryukyu and Philippine arcs. Activation of the South China Sea basin could become stronger and later eastwards, and stress fields from small scale of mantle convection appear to converge in Okinawa Trough and Mana Trough. These evidences above...
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