The structural coupling is a common geological phenomenon. The structural differences between eastern and western active continental margins of modern Pacific and between paleo-Pacific and modern-Pacific continental margins are related to the characteristics and status of the subducting oceanic plate, namely, 1. subducting angle; 2. change in subducting angle; 3. subducting velocity; 4. change in subducting velocity; 5. subduction depth; 6. horizontal distance between the leading edge of the subducting plate and the trench; 7. the structural form of the subducting plate at the 670km boundary between the upper and lower mantle; 8. the displacement and the direction of displacement of subducting plate. The control and influence toward the shallow-level structures by the deep-level structural activities is a detailed representation of the structural coupling on active continental margin.The basin-maintain coupling phenomenon is an intracontinental structural coupling. The far field effect of collision between Indian plate and Eurasian plate results in the occurrence of intracontinental A-type subduction in central Asia, and the A-type subduction is the key factor that results in the atrophy of basins and the formation of mountain systems.
ZHU Wenbin GUO Lingzhi MA Ruishi SUN Yan WANG Feng
Based on the knowledge of the shallow-level mylonitization of detrital rocks and intrusive rocks,the poorly-known cataclastic rheology of carbonate rocks is discussed compre-hensively in this paper.The cases taken from eastern China are analyzed in various aspects including ductile-brittle fault zone,rock texture and structure,clastomylonite layer,leucocratic stress minerals,and frictional dynamometamorphism.It is proposed that the cataclastic flow structure represented by clastomylonite texture is a cooling pattern of flow assemblage charac-terized by cooling metamorphism,cooling mylonite and cooling stress minerals.Such a pattern is formed generally in mildly reducing physicochemical environments,and is commonly related to regional tectonism and mesothermal and epithermal mineralization.
LU XiancaiSUN YanSHU LiangshuGU LianxingGUO JichunZHU Wenbin
