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全球五大板块的运动和形变──用卫星激光测距数据导出的站速度分析 被引量:11

STUDY OF PLATE MOTION AND CRUSTAL DEFORMATION FROM SATELLITE LASER RANGING SITE VELOCITIES
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摘要 根据德国卫星激光测距(SLR)数据分析中心GFZ对1980年1月-1991年7月获取的SLR观测数据处理后得到的41个SLR站的站速度,解算了北美、欧亚、太平洋、南美和澳大利亚板块之间的相对运动欧拉矢量,得到了第1个SLR实测的板块运动模型SPMM1.与地学板块模型RM2和NUVEL-1的比较指出,SPMM1大体上与地学模型一致,与NUVEL-1更为接近;SPMM1的欧亚与北美板块相对运动欧拉极与NUVEL-1的相应极很接近,但旋转速率明显偏小.还分析了各板块上SLR站的局部形变特征.欧亚板块东部和西部存在10-20mm/a的相对运动;板块边界附近SLR站的残差站速度基本上反映了该边界的构造形变特征. According to site velocities of SLR stations provided by Germany SLR data analysis center GFZ from Satellite Laser Ranging to LAGEOS(1980-o1-1991-07),we derived an instantaneous plate motion model(SPMM1) for the first time in this paper.SPMM1 includes 10 Euler vectors between 5 plates(Eurasia,Pacific,North America,South America and Australia),the comparison with the geological plate motion models RM2 and NUVEL-1 indicates that SPMM1 is roughly consistent with the geological models,and matchs better NUVEL-1.EURA-NOAM pole of SPMM1 is very closed to the pole NUVEL-1,but its rotation rate is obviously smaller than that of NUVEL-1,so we may conclude that EURA-NOAM plate motion has become slow in recent 3 million years.According to residual site velocities,we also analysed local deformation feature of SLR stations on Eurasla,North America,Pacific plates.There is 10-20mm/a relative motion between western and eastern Eurasia;the residual site velocities of SLR stations near plate boundaries can describe tectonic deformation feature of these boundaries better.
作者 孙付平 赵铭
出处 《地球物理学报》 SCIE EI CSCD 北大核心 1994年第5期596-605,共10页 Chinese Journal of Geophysics
基金 国家科委"八五"攀登计划课题
关键词 卫星激光测距 板块运动 地壳形变 Satellite Laser Ranging Plate motion Crustal deformation Eurasia Plate Pacific Plate North America Plate South America Plate Australia Plate
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