TY  - JOUR
A1  - Maercklin, Nils
A1  - Bedrosian, Paul A.
A1  - Haberland, Christian
A1  - Ritter, O.
A1  - Ryberg, Trond
A1  - Weber, Michael H.
A1  - Weckmann, U.
T1  - Characterizing a large shear-zone with seismic and magnetotelluric methods : the case of the Dead Sea Transform
N2  - Seismic tomography, imaging of seismic scatterers, and magnetotelluric soundings reveal a sharp lithologic contrast along a similar to 10 km long segment of the Arava Fault (AF), a prominent fault of the southern Dead Sea Transform (DST) in the Middle East. Low seismic velocities and resistivities occur on its western side and higher values east of it, and the boundary between the two units coincides partly with a seismic scattering image. At 1 - 4 km depth the boundary is offset to the east of the AF surface trace, suggesting that at least two fault strands exist, and that slip occurred on multiple strands throughout the margin's history. A westward fault jump, possibly associated with straightening of a fault bend, explains both our observations and the narrow fault zone observed by others
Y1  - 2005
SN  - 0094-8276
ER  - 
TY  - JOUR
A1  - Martin, Sebastian
A1  - Haberland, Christian
A1  - Rietbrock, Andreas
T1  - Forearc decoupling of guided waves in the Chile-Peru subduction zone
N2  - The structure and alterations of subducted oceanic lithosphere ( e. g., thickness and seismic velocity of oceanic crust) can be obtained by analyzing guided seismic waves generated by earthquakes within the slab (Wadati- Benioff zone). In northern Chile prominent secondary phases from intermediate-depth seismicity, observed in the forearc region can be interpreted as guided waves. For the observation of guided waves it is usually required to have stations close to the wave guide, a fact which is not directly given for forearc stations in subduction zone environments. With the help of finite difference simulations we model the decoupling mechanism of guided waves at the contact between the descending oceanic plate and the upper plate crust where the wave guide is opened due to the equalization of seismic velocities. Provided that suited stations are available, this mechanism allows for the use of intermediate depth seismicity to study the shallow subduction zone structure ( <= 100 km depth)
Y1  - 2005
ER  -