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Present-day crustal deformation and plate kinematics in the Middle East constrained by GPS measurements in Iran and northern Oman 总被引：14，自引：0，他引：14
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Davoudi Nader Tavakoli Hamid Reza Zare Mehdi Jalilian Abdollah 《Natural Hazards》2020,100(3):1159-1170
Natural Hazards - Aftershock probabilistic seismic hazard analysis (APSHA) has a key role in risk management after a major earthquake. The main goal of the current study is to assess aftershock... 相似文献
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2D inversion of the magnetotelluric data from Mahallat geothermal field in Iran using finite element approach 总被引：1，自引：0，他引：1
The natural-field magnetotelluric (MT) method has proven very useful for mapping the geothermal fields as resistivity sections. The depth of investigation of the MT method is sufficiently large to penetrate deep into the upper crust. MT soundings along two transects across Mahallat geothermal field in Iran were carried out to determine the crustal structure in the region. The selected MT profiles in the region cross over the hydrothermally altered zones and different geological structures. Data were acquired along two profiles crossing the Mahallat hot springs with a total of 28 MT stations in a frequency range of 8,000 to 0.008 Hz. Spacing between stations was kept 500 m for a good resolution. We have used the code MT2DInvMATLAB for inversion using the method of finite elements for forward modeling. Apparent resistivity and phase data of transverse electric (TE), transverse magnetic (TM), and TE + TM modes along each profile were modeled. The geothermal fluid reservoir is resolved at 1,000 to 3,000 m depth and the geothermal resource is estimated to be located at 7,000 m or deeper. 相似文献
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Mahdi Motagh Jürgen Klotz Farokh Tavakoli Yahya Djamour Siavash Arabi Hans-Ulrich Wetzel Jochen Zschau 《Pure and Applied Geophysics》2006,163(1):1-18
We used new precise leveling data acquired 40 days after the Bam earthquake in combination with radar interferometry observations
from both ascending and descending orbits to investigate static deformation associated with the 2003 Bam earthquake. We invert
this geodetic data set to gain insight into the fault geometry and slip distribution of the rupture. The best-fitting dislocation
model is a steeply east-dipping right-lateral strike-slip fault that has a size of 11 by 8 km and strikes N2°W. We find that
such smooth geometry fits available geodetic data better than previously proposed models for this earthquake. Our distributed
slip model indicates a maximum strike slip of 3 m occurring about 3 to 5 km deep. The slip magnitude and depth of faulting
taper to the north, where the fault approaches the Bam city. Inclusion of crustal layering increases the amount of maximum
slip inferred at depth by about 4%. 相似文献
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Frédéric Masson Mohammad Anvari Yahya Djamour rea Walpersdorf Farokh Tavakoli Marc Daignières Hamid Nankali Sébastien Van Gorp 《Geophysical Journal International》2007,170(1):436-440
A network of 26 GPS sites was implemented in Iran and Northern Oman to measure displacements in this part of the Arabia–Eurasia collision zone. We present the GPS velocity field obtained from three surveys performed in 1999 September, 2001 October and 2005 September and the deduced strain tensor. This study refines previous studies inferred from only the two first surveys. Improvements are significant in NE Iran. The present-day shortening rate across the mountain belts of NE Iran is estimated to 5 ± 1 mm yr−1 at about N11°, 2 ± 1 mm yr−1 of NS shortening across the eastern Kopet Dag and 3 ± 1 mm yr−1 of NS shortening across Binalud and Kuh-e-Sorkh. Our GPS measurements emphasize the varying character of the Kopet Dag deformation between its southeastern part with prevailing thrusting at low rates and its northwestern part with dominant strike-slip activity at increasing rates. The principal axes of the horizontal strain tensor appears very homogeneous from the Zagros to the Alborz and the Kopet-Dag (N20°) and in eastern Iran (Makran and Lut block: N30°). Only NW Iran suffers a variable strain pattern which seems to wrap the Caspian basin. The strain tensor map underlines the existence of large homogeneous tectonic provinces in terms of style and amplitude of the deformation. 相似文献