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青藏高原东部及邻区为典型的大陆地壳变形区。根据GPS监测结果,得出了欧亚参考框架的运动速度场;采用刚性假设下最小二乘法,对地块现今运动进行了研究。GPS监测结果表明:柴达木地块、甘青地块、华南地块、川滇地块、印支地块运动速率分别为(11.95±2.89)mm/a,(11.86±2.32)mm/a,(7.83±2.08)mm/a,(13.18±2.43)mm/a,(6.45±1.95)mm/a;运动方向分别为61.1°,93.8,°113.1,°134.8,°141.6°;旋转速率分别为2.91×10-9rad/a,6.91×10-9rad/a,0.38×10-9rad/a,2.15×10-9rad/a,1.45×10-9rad/a。柴达木地块、甘青地块、川滇地块活动性较强,而华南地块、印支地块活动性较弱,属于稳定地块;各块体围绕东喜马拉雅构造结呈顺时针旋转。地块规律性运动特征与印度板块向北俯冲、推挤有作密切关系;而地块的差异运动则与总体构造应力条件下远程边缘效应及地块之间相互作用有关。
The eastern part of the Qinghai-Tibet Plateau and its adjacent area are typical crustal deformation zones. According to the results of GPS monitoring, the velocity field of Eurasian Reference Frame is obtained. The current square-block motion is studied by the least-squares method under rigid assumption. The results of GPS monitoring showed that the movement rates of Qaidam block, Ganqing block, South China block, Sichuan-Yunnan block and Indo-China block were (11.95 ± 2.89) mm / a and (11.86 ± 2.32) mm / a , (7.83 ± 2.08) mm / a, (13.18 ± 2.43) mm / a and (6.45 ± 1.95) mm / a, respectively. The motion directions were 61.1 °, 93.8 °, 113.1 °, 134.8 ° and 141.6 ° respectively. 2.91 x 10-9 rad / a, 6.91 x 10-9 rad / a, 0.38 x 10-9 rad / a, 2.15 x 10-9 rad / a, 1.45 x 10-9 rad / a. Qaidam block, Ganqing block, Sichuan-Yunnan block activity is strong, and the South China block, Indosinian block activity is weak, belonging to a stable block; each block around the East Himalayan knot clockwise Rotate. The regular movement characteristics of the block are closely related to the subduction and pushing of the Indian plate to the north, while the differential movement of the block is related to the remote edge effect under the general tectonic stress and the interaction between the blocks.