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利用全球重力大地水准面异常、板块绝对运动及全球地震层析成像数据,计算了青藏高原—天山地区岩石层下部地幔大尺度对流格局以及此种尺度对流驱动下岩石层内应力场分布;同时,利用区域均衡重力异常数据反演青藏高原中、北部到天山地区上地幔小尺度对流模型.结果表明,大尺度的地幔物质运移过程可能驱动着中国大陆岩石层整体从西部以南北方向为主的运动转向东部地区以北东和南东方向的运动;而该区域上地幔小尺度上升流动支持了现代青藏高原和天山地区的抬升运动.提出和讨论了青藏高原隆升的“断离隆升—挤压隆升—对流隆升”三阶段模式,并探讨了大陆岩石层构造运动的地幔深部动力学背景.
Based on the global gravity geoid anomaly, plate absolute motion and global seismic tomography data, the large-scale convection pattern of the lower mantle beneath the lithosphere in the Qinghai-Xizang Plateau and the Tianshan area and the distribution of stress fields in the lithosphere driven by this scale convection are calculated. Retrieval of Small - scale Convective Upper Mantle Convection Models from the Central and Northern Parts of TSP to the Tianshan Mountains Using Regional Equilibrium Gravity Anomaly Data. The results show that large-scale migration of mantle material may drive the movement of the whole rock formation in the Chinese mainland from north to south in the west to east and northeast of the east. In the region, Support the uplift movement of the modern Qinghai-Tibet Plateau and Tianshan Mountains. Proposed and discussed the three-stage model of “uplift-crust uplift-convection uplift” in the uplift of the Qinghai-Tibet Plateau, and discussed the deep mantle kinetic background of the continental lithospheric tectonic movement.