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。
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.
出处
《大地测量与地球动力学》
CSCD
北大核心
2012年第1期26-30,共5页
Journal of Geodesy and Geodynamics
基金
国家重大基础科技项目(2008CB425704)
国际科技合作计划(2010DFB20190)