Neotectonics at the Arabian plate margins
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- 作者：Vita-Finzi ; Claudio
- 刊名：Journal of Structural Geology
- 出版年：2001
- 出版时间：February 3, 2001
- 年：2001
- 卷：23
- 期：2-3
- 页码：521-530
- 全文大小：229 K
文摘
Opening of the Red Sea is accompanied by convergence between the Arabian plate and Eurasia. Regional topography and structure favour gravity glide as the main driving force of plate translation. At the leading edge of the plate, the Zagros Mountains undergo coseismic serial folding which is equivalent to Holocene shortening by 
20mm/year and which has led to major episodes of coastal uplift of which the last was 1700years BP. At the Jordan Rift transform, which bounds the Arabian plate on the west, a recurrence interval of 1600years is reported for events of ML≥5.5. The palaeomagnetic record for the last 3.2Ma indicates an average spreading rate for the Red Sea of 20mm/year; there is some evidence that hydrothermal activity in the Red Sea is pulsatory, with a period of 2000year, and that it reflects discontinuous spreading. The Holocene neotectonic records of the Zagros, the Jordan Rift and the Red Sea are the product of complex plate interactions and of the accumulation and release of strain in the crust along the plate margins. But they also reflect elastic strain energy storage and release within the Arabian plate, whence parallels in the period of major deformation episodes in the three deforming zones and the apparent discrepancy between the seismic moment predicted by plate kinematics and that recorded in the Zagros. Any associated intraplate deformation, if detected geodetically, would thus help the assessment of seismic hazard.
20mm/year and which has led to major episodes of coastal uplift of which the last was 1700years BP. At the Jordan Rift transform, which bounds the Arabian plate on the west, a recurrence interval of 1600years is reported for events of ML≥5.5. The palaeomagnetic record for the last 3.2Ma indicates an average spreading rate for the Red Sea of 20mm/year; there is some evidence that hydrothermal activity in the Red Sea is pulsatory, with a period of 2000year, and that it reflects discontinuous spreading. The Holocene neotectonic records of the Zagros, the Jordan Rift and the Red Sea are the product of complex plate interactions and of the accumulation and release of strain in the crust along the plate margins. But they also reflect elastic strain energy storage and release within the Arabian plate, whence parallels in the period of major deformation episodes in the three deforming zones and the apparent discrepancy between the seismic moment predicted by plate kinematics and that recorded in the Zagros. Any associated intraplate deformation, if detected geodetically, would thus help the assessment of seismic hazard.