Secular and tidal strain across the main Ethiopian rift
Secular and tidal strain across the main Ethiopian rift
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DOI：
10.1029/1998gl005315
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发表时间：
1999-09-15
影响因子：
5.2
通讯作者：
Asfaw, L
中科院分区：
文献类型：
--
作者：
Bilham, R;Bendick, R;Asfaw, L
利用1969年至1997年获得的激光测距和GPS数据，我们得出了埃塞俄比亚索马里和努比亚板块的分离速度（4.5+/-1毫米/年，在N108+/-10 E）。该矢量垂直于埃塞俄比亚裂谷轴的NNE向新构造轴（Wonji断层带）。目前裂谷集中在一个33公里宽的区域，其中包括一个7公里宽的晚第四纪断层带的最大表面应变率是可比的活动板块边界（0.1亩应变/年）。该应变场表明，薄（
Using a combination of laser ranging and GPS data acquired between 1969 and 1997 we derive a separation velocity for the Somali and Nubian plates in Ethiopia (4.5+/-1 mm/yr at N108+/-10E). This vector is orthogonal to the NNE-trending neotectonic axis (Wonji fault belt) of the Ethiopian rift axis. Current rifting is concentrated within a 33-km-wide zone that includes a 7-km-wide belt of late Quaternary faulting where maximum surface strain rates are comparable to those at active plate boundaries (0.1 mu strain/yr). The strain-field suggests that thin (