作为青藏高原东南缘一条重要的构造边界，红河断裂长期影响着两侧地区的构造演化和地层发育；在印度-欧亚板块碰撞、青藏高原隆升、断层及地块剧烈运动和变形过程中，起着重要的调节或转换作用。但近年来，红河断裂带及邻区地震活动较弱，是断层边界作用弱化？还是已处于强闭锁状态？由于观测资料的缺少，对红河断裂现今形变的时空不均匀性、分段分层特征、动力学机制等尚存疑义。本申请拟对红河断裂及邻区的历史GPS 资料系统整理，结合新增近场连续、流动观测及各分段的剖线资料，获取高精度、高分辨率三维速度场和时间序列；精确测定断层各段的运动学特征（滑动速率及运动特征、应力分配方式、相邻活动地块的旋转及运动幅度等），进而结合其他观测资料，建立动力学模型，从动力学角度研究红河断裂带在吸收、转换印度-欧亚板块汇聚中的作用，澄清红河断裂带现今表现出的边界弱化作用及其机理，为研究区强震发生的动力学机理和潜在的地震危险性评估提供佐。

As a very important tectonic boundary in the southeastern margin of the Tibetan Plateau,the Red River fault has a long-term impacts on the tectonic evolution and the stratigraphic of its vast areas on both sides.It also plays an important regulating or conversion role in the collision of the Indian plate and Eurasian plate, the Tibetan Plateau uplift,the vigorous activity and deformation process of the faults and block.Moreover, the Red River fault live the strong earthquake activity. But in recent years, the seismic activities in the Red River fault zone and its adjacent area become weak relatively, why?The boundary effect of the fault become weaken? Or the fault has been in strong blocking state?However,due to the lack of observation data in the Red River fault ,we are still vague in its spatial and temporal heterogeneity ,segmentation and layered features,also the dynamic mechanism.In this study,we will systematically collect the histric GPS data of the Red River fault and its adjacent areas,cooperated with the new continuous and rover GPS data,the mobile observation data and the GPS profile data across the fault of different section.then process the data more refined to obtain a high-precision and high-resolution three-dimensional velocity field,also the time series of the baselines,and then measure the kinematics characteristics of all segments on the fault accurately (the fault slip rate and its movement characteristics,the stress distribution methods,the rotation and motion range of the adjacent blocks,etc.),On this basis,we will combine others geophysical observation datas to establish the finite element dynamic model, the ultimate aim is to study the meaning of the Red River fault in the absorption and conversion between the India - Eurasia plates convergence,and clarify why the Red River fault show weakening effect boundaries today , then provide evidence to the kinetic mechanism and potential seismic hazard assessment of the strong earthquake occurrence in the study area .