利用局域复测GPS网研究中国大陆块体现今地壳运动速度场  

Present-day Crustal Movement Speed Field of China Continent Block Using Local Repeated GPS Network

作　　者：刘经南[1] 施闯[2] 许才军[2] 姜卫平[2] 

机构地区：[1]武汉大学校长办公室,武汉市珞珈山430072 [2]武汉大学GPS工程技术研究中心,武汉市珞喻路129号430079

出　　处：《武汉大学学报（信息科学版）》2001年第3期189-195,共7页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金!资助项目 (499740 0 1) ;国家攀登计划资助!项目 (970 2 310 0 3)

摘　　要：利用 1992年以来我国进行的 6项不同规模高精度GPS地壳监测网的资料 ,采用统一的数据处理策略 ,重新进行了数据处理 ,并统一进行了平差 ,归算到相同的ITRF97坐标框架基准之下 ,获得了中国目前覆盖最广、测站最多的一个较为完整的、框架统一的GPS地壳运动图像和速度场 ,并对结果作了初步的地学解释。Since 1992,China has established many large_scale high precision GPS crustal deformation monitoring network,including state high precision GPS Order_A network,China crustal deformation monitoring network,crustal deformation monitoring network in Qinghai_Tibet plateau,north China network,southeast coastal GPS network and Sinkiang network.GPS measurements of above GPS crustal monitoring networks are collected and they are reprocessed in ITRF97 frame.A complete GPS crustal movement image and speed field with uniform frame,the largest coverage and the most stations are obtained.Finally ,a primary geo_scientific explanation of the speed field is given in the paper. China continent is located in the southeast of Eurasian plate.Its special tectonic location and lithographic structure after long_period complex evolvement makes the continental rock layer divided into several plates.And the main tectonic deformation happens at the faulted zone,folded belt and fault depression belt at the border of these plates,while the relative deformation inside the plates is small.There are mostly seismic active belts along the border of plates,thus the research of movement law and relative deformation is the hotspot that catches the attention of the geodetic world.According to the convergence velocity of plates,the uplifting extent of Pliocene epoch leveling and the gliding velocity of the fault,the compression velocity of each fault mountain system in the west of China continent can be estimated,and the movement velocity of each plate relative to Siberian land mass can be deduced.Moreover,the Euler poles and angular velocities of China continent blocks are figured by active fault gliding velocity according to plate geometry,and then average movement velocity vectors of each block are calculated,but they are all average value on the scale of geology.Movement images and relative movement images of each plate or block relative to one ITRF frame are obtained.However,China continent lacks a complete integer movement image of each main pla

关 键 词：GPS 大陆块体 地壳运动 速度场 平差 数据处理 

分 类 号：P227[天文地球—大地测量学与测量工程] P228.4[天文地球—测绘科学与技术]