Seismic imaging of deep low-velocity zone beneath the Dead Sea basin and transform fault : implications for strain localization and crustal rigidity
Table S2: Goodness of fit for various arrivals in a model with a constant Moho slope between the two edges of the model. (310bytes)
Table S3: Goodness of fit for various arrivals in a model with a constant slope of upper-lower crust interface between model km 40 and 175. (327bytes)
Table S4: Goodness of fit for various arrivals in a model with a Moho step 1.4 km high and 5.6 km wide. (323bytes)
Table S5: Goodness of fit for various arrivals in models with a mantle wedge rising to different levels into the lower crust. (1.043Kb)
Table S6: Goodness of fit for various arrivals in models with flexural uplift of the entire crust east of the Dead Sea transform. (1.231Kb)
Table S7: Goodness of fit for various arrivals in models to verify the existence of a lower velocity structure extending to a depth of 18 km beneath the Dead Sea basin. (613bytes)
ten Brink, Uri S.
Al-Zoubi, Abdallah S.
Flores, Claudia H.
Harder, Steven H.
Keller, G. Randy
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New seismic observations from the Dead Sea basin (DSB), a large pull-apart basin along the Dead Sea transform (DST) plate boundary, show a low velocity zone extending to a depth of 18 km under the basin. The lower crust and Moho are not perturbed. These observations are incompatible with the current view of mid-crustal strength at low temperatures and with support of the basin's negative load by a rigid elastic plate. Strain softening in the middle crust is invoked to explain the isostatic compensation and the rapid subsidence of the basin during the Pleistocene. Whether the deformation is influenced by the presence of fluids and by a long history of seismic activity on the DST, and what the exact softening mechanism is, remain open questions. The uplift surrounding the DST also appears to be an upper crustal phenomenon but its relationship to a mid-crustal strength minimum is less clear. The shear deformation associated with the transform plate boundary motion appears, on the other hand, to cut throughout the entire crust.
Author Posting. © American Geophysical Union, 2006. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 33 (2006): L24314, doi:10.1029/2006GL027890.
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