Active tectonics along the Wadi Araba-Jordan Valley transform fault
Active tectonics along the Wadi Araba-Jordan Valley transform fault
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沿瓦迪阿拉巴-约旦河谷的活动构造转换断层
DOI：
10.1029/1998jb900013
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发表时间：
1999
影响因子：
--
通讯作者：
P. Galli
中科院分区：
文献类型：
--
作者：
P. Galli
沿着分隔阿拉伯板块和西奈-非洲板块的转换断层，沿沿着200公里长的Wadi Araba进行了地质研究。最近的运动沿着这一结构影响上更新世-全新世沉积和考古遗址。运动学指标显示左旋走滑和斜向运动，与两个板块之间的相对运动一致。近期水平位移的其他证据存在沿着约旦谷断层，无论是在死海-太巴列湖段和太巴列湖以北的部分。据估计，瓦迪阿拉巴断层南段和约旦河南部断层的最小水平滑动速率为1 cm/年。这两个断层可以大致细分为至少四个部分：两个在Wadi Araba（每个长80公里），一个从死海到太巴列湖（130公里），一个从太巴列湖到Hula地堑（>30公里）。断层也可能沿着较短的子段发生沿着，如阿拉伯河-约旦河断层的弯曲和局部压缩和伸展特征的增长所示。仪器记录的地震活动似乎主要集中在沿着的一些子段。将观测到的地震滑动率与现场确定的断层滑动率进行比较，表明过去2000年期间可能存在应变积累。
A geological study has been carried out along the 200 km long Wadi Araba following the transform fault that separates the Arabian and Sinai-African Plates. Recent movements along this structure affect upper Pleistocene-Holocene deposits and archaeological sites. Kinematic indicators show sinistral strike-slip and oblique movements, in agreement with the relative motion between the two plates. Other evidence of recent horizontal displacement exists along the Jordan Valley Fault, both on the Dead Sea-Lake Tiberias segment and on the segment north of Lake Tiberias. A minimum horizontal slip rate of 1 cm yr−1 has been estimated for both the southern segment of the Wadi Araba Fault and for the southern Jordan River Fault. The two faults can be roughly subdivided into at least four segments: two in the Wadi Araba (80 km long each), one from the Dead Sea to Lake Tiberias (130 km), and one from Lake Tiberias to the Hula graben (>30 km). Faulting may also occur along shorter subsegments, as shown by bends in the Wadi Araba-Jordan River Fault and by the growth of local compression and extension features. Instrument-recorded seismicity appears to be mainly concentrated along some of these subsegments. A comparison between the observed seismic and field-determined slip rates across the fault indicates possible strain accumulation during the last 2000 years.