Shallow architecture of the Wadi Araba fault (Dead Sea Transform) from high-resolution seismic investigations

Haberland, Christian; Maercklin, N.; Kesten, D.; Ryberg, Trond; Janssen, Ch.; Agnon, Amotz; Weber, M.; Schulze, A.; Qabbani, I.; El‐Kelani, R.

doi:10.1016/j.tecto.2006.12.006

Cited by 31 publications

(32 citation statements)

References 64 publications

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“…In the southern Arava Valley (study area B), brittle fault damage forms a zone up to 300 m wide (Janssen et al 2004). Highresolution seismic investigations characterize the shallow part of the AF as a rather broad (100 -300 m wide) heterogeneous zone of deformed and displaced material (Haberland et al, 2007).…”

Section: Fault Architecture and Fault Zone Charactermentioning

confidence: 99%

Different styles of faulting deformation along the Dead Sea Transform and possible consequences for the recurrence of major earthquakes

Janssen¹,

Hoffmann‐Rothe²,

Bohnhoff³

et al. 2007

Journal of Geodynamics

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We compare fault-related deformation of three segments of the major transform plate boundary between Africa and the Arabian plate, the Dead Sea Transform (DST), namely: the Arava/Araba fault (Jordan/Israel), the Serghaya fault and the Ghab fault (both Syria). These segments show both similarities and marked differences in faulting deformation and fluid-rock interactions. In the case of the Arava fault, fault damage occurs across a zone up to 300 m wide. A fault core/gouge zone is not exhibited.Along the Serghaya fault, the typical fault zone architecture with a main gouge zone and a damage zone of up to 100 m thickness is exposed. Effects of faulting in the Ghab segment are shown by subsidiary faults and the formation of fault breccias. As in the Arava fault segment, a fault core is not exposed. were active along Serghaya fault and Ghab fault, where fault rock cementation led to * Corresponding author. Fax: +49-331-288-1328, E-mail address: jans@gfz-potsdam.de 2 porosity reduction and lower permeability. Such low permeability could create domains of higher pore fluid pressure, which reduce the effective shear stress required for slip on the fault. These differences in fluid-rock interactions may have played an important role with respect to the occurrence of earthquakes. We suggest that the recurrence interval on a fault segment that recovers after an earthquake without fluid assisted healing (e.g. Arava fault) should be longer than on segments with strong fluidassisted healing (cementation; e.g. Serghaya fault, Ghab fault), given that the regional stress field is the same.

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Section: Fault Architecture and Fault Zone Charactermentioning

confidence: 99%

Different styles of faulting deformation along the Dead Sea Transform and possible consequences for the recurrence of major earthquakes

Janssen¹,

Hoffmann‐Rothe²,

Bohnhoff³

et al. 2007

Journal of Geodynamics

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“…After this, we fixed the thus obtained Vp model and inversion for the best-fit Vp/Vs model, starting from a variety of initial values for Vp/Vs. This procedure proved to be robust in a number of previous studies (e.g., Haberland et al 2007). …”

Section: Hypocenter Location and Velocity Modelmentioning

confidence: 68%

Seismotectonic study of the Fergana Region (Southern Kyrgyzstan): distribution and kinematics of local seismicity

et al. 2015

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We present new seismicity and focal-mechanism data for the Fergana basin and surrounding mountain belts in western Kyrgyzstan from a temporary local seismic network. A total of 210 crustal earthquakes with hypocentral depths shallower than 25 km were observed during a 12-month period in 2009/2010. The hypocenter distribution indicates a complex net of seismically active structures. The seismicity derived in this study is mainly concentrated at the edges of the Fergana basin, whereas the observed rate of seismicity within the basin is low. The seismicity at the dominant tectonic feature of the region, the Talas-Fergana fault, is likewise low, so the fault seems to be inactive or locked. To estimate the uncertainties of earthquake locations derived in this study, a strong explosion with known origin time and location is used as a ground truth calibration event which suggests a horizontal and vertical accuracy of about 1 km for our relocations. We derived 35 focal mechanisms using first motion polarities and retrieved a set of nine moment tensor solutions for earthquakes with moment magnitude (Mw) ranging from 3.3 to 4.9 by waveform inversion. The solutions reveal both thrust and strike-slip mechanisms compatible with a NW-SE direction of compression for the Fergana region. Two previously unknown tectonic structures in the Fergana region could be identified, both featuring strike-slip kinematics. The combined analysis of the results derived in this study allowed a detailed insight into the currently active tectonic structures and their kinematics where little information had previously been available.

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“…They have been used to estimate the across-fault properties of a low velocity zone at a resolution of tens of metres (Ben-Zion et al 1992Hough et al 1994;Haberland et al 2003Haberland et al , 2007Li et al 1997Li et al , 1998Li et al , 1999Li et al , 2014Li & Vernon 2001;Li & Malin 2008;Mizuno et al 2004;Lewis et al 2005Lewis et al , 2007Wu et al 2010;Ellsworth & Malin 2011;Eccles et al 2015). Several different analytical, numerical and computational approaches have been proposed and employed to investigate the effects of 2-D and 3-D variations in rock properties, source type and location.…”

Section: Introductionmentioning

confidence: 99%

The effect of gradational velocities and anisotropy on fault-zone trapped waves

Gulley

Eccles

Kaipio

et al. 2017

Geophysical Journal International

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Shallow architecture of the Wadi Araba fault (Dead Sea Transform) from high-resolution seismic investigations

Cited by 31 publications

References 64 publications

Different styles of faulting deformation along the Dead Sea Transform and possible consequences for the recurrence of major earthquakes

Different styles of faulting deformation along the Dead Sea Transform and possible consequences for the recurrence of major earthquakes

Seismotectonic study of the Fergana Region (Southern Kyrgyzstan): distribution and kinematics of local seismicity

The effect of gradational velocities and anisotropy on fault-zone trapped waves

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