东北地区现今地壳形变特征研究  

PRESENT-DAY CRUSTAL MOVEMENT IN NORTHEAST CHINA WITH GPS DATA

作　　者：孟国杰[1] 申旭辉[1] 伍吉仓[2] 任金卫[1] Eugene A Rogozhin 

机构地区：[1]中国地震局地震预测研究所,北京100036 [2]同济大学测量与国土信息工程系,上海200092 [3]俄罗斯科学院大地物理研究所,莫斯科123995

出　　处：《大地测量与地球动力学》2007年第1期19-23,共5页Journal of Geodesy and Geodynamics

基　　金：973"专项中俄资源环境领域重大问题合作研究"(2005CB724803);地震科学联合基金(605032);中国博士后基金(20040350495)

摘　　要：利用东北地区37个GPS测站1997～2005年的观测数据研究了该区现今地壳形变特征。结果显示：东北地区相对欧亚板块的位移速率矢量较小，平均为1．58mm／a，表明该区总体上比较稳定；有5个测站的水平位移速率在95％的置信水平上具有显著性，而其他测站则并不显著；辽西地区的几个测站显示出一致性的东南运动，可能是青藏高原东向运动的远程效应；靠近1999年Mw7．1和2002年Mw7．3深源地震震中的测站速率较小，说明这两次深源地震对地表造成的形变并不明显。黑龙江东北部测站运动可能反映了北美板块向南楔入对欧亚板块的影响。The present-day crustal deformation in the northeast China is studied with GPS data of 37 stations during 1997 - 2005. The velocities related to Eurasia is generally small, 1.58 mm/a on average, it is showing that the region is generally stable. Horizontal velocities of 5 stations appear to be significant at 95% confidence level, however other stations show insignificant motion. Several stations in the southwestern comer of the studied region are consistently moving towards the southeast, this is most probably a distant effect of the eastward motion of Qing-hai-Tibet plateau. Small velocities of the stations near the epicenters of the 1999 Mw7.1 and 2002 Mw7.3 deep-focus earthquakes in Wangqing county, show that the 2 earthquakes did not cause broad deformation of shallow crust. The horizontal velocities of the stations in the Northeastern Heilongjiang province may reflect the effect of the North America plate＇s invasion on the Eurasia plate.

关 键 词：东北地区 GPS 地壳形变 欧亚板块 水平位移速率 

分 类 号：P315.725[天文地球—地震学] P227[天文地球—固体地球物理学]