【摘要】 利用GPS速度研究了低纬度环球剪切带主要断裂的活动性,结果显示:北安纳托利亚断裂、北高加索断裂、嘉黎断裂、实皆断裂以及苏门答腊断裂均表现为右旋走滑特征,滑动速率分别为13.7±0.6、5.8±0.5、7.1±1.0、12.7±0.2和25.4±0.5 mm/a;索龙断裂和危地马拉断裂呈现左旋走滑特征,滑动速率分别为29.2±1.8、14.1±1.0 mm/a;嘉黎断裂和苏门答腊断裂表现出强挤压性,挤压量分别为18.5±1.0、15.2±0.6 mm/a;索龙断裂表现出强拉张性,拉张量为10.7±1.1 mm/a。低纬度剪切带总体上表现出较强的活动性并以剪切活动为主。更多还原

【Abstract】 Global Positioning System(GPS) measure campaign in shear zone at low-latitudes was conducted in 1991 and 2003,for quantifying the present-day major faults’ activity.The results are as follow,the north Antolia fault,Jiali fault,Sagaing fault and Sumatra fault are right lateral motion,the rates are(13.7±0.6),(5.8±0.5)(7.1±1.0),(12.7±0.2)and(25.4±0.5)mm/a respectively;while the Sorong fault and Guatemala fault are left lateral motion,the rates are 29.2±1.8),(14.1±1.0)mm/a,respectively.Besides,Sumatra fault and Jiali fault also show strong squeezing,(18.5±1.0),(15.2±0.6) mm / a,respectively,while Sorong fault show powerful pull,reached to :(10.7±1.1) mm / a.Overall,the shear activity dominats in the shear zone at low-latitudes.更多还原