The Bilila-Mtakataka fault in Malawi: an active, 100-km long, normal fault segment in thick seismogenic crust

Article Abstract:

The southern part of the western branch of the east African rift in Malawi contains the active, 100-km long Bilila-Mtakataka normal fault. The fault is located about 50 km from the epicenters of earthquakes in 1989 that had a centroid depths of around 32 km, huge half-graben widths, and an effective elastic thickness of about 30 km. The fault segment is up to 15 m high with a total offset of about 1000 m. Geomorphological and seismological studies suggest that the thickness of the seismogenic layer strongly controls the scale of geological structures that form within it.

Observations, Earthquakes, Malawi

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Deformation partitioning in a slow spreading ridge undergoing oblique extension: Mohns Ridge, Norwegian Sea

Article Abstract:

The deformation and kinematics of the Mohns Ridge, Norwegian Sea are investigated. Data reveal the presence of oblique spreads in the ridge, which causes deformation partitioning between valley walls. The structural pattern of the faults is consistent with a strike-slip component of the displacement relative to the ridge trend. The oblique rifting is posited to be influenced by the thermal structure of the lithosphere.

Rifts (Geology), Norwegian Sea

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