The deformation and 40Ar–39Ar dating of recent volcanism, that remarkably sits across the North Anatolian Fault eastern termination in Turkey, together with previous studies, put strong constraints on the long-term evolution of the fault. We argue that after a first phase of 10 Ma, characterized by a slip rate of about 3 mm/a, and during which most of the trace was established, the slip rate jumped to about 20 mm/a on average over the last 2.5 Ma, without substantial increase of the fault length. The transition correlates with a change in the geometry at the junction with the East Anatolian Fault that makes the extrusion process more efficient.
Hubert Ferrari, A., King, G., van der Woerd, J., Villa, I., Altunel, E., Armijo, R. (2009). Long-term evolution of the North Anatolian Fault: new constraints from its eastern termination. In D. van Hinsbergen, M.A. Edwards, R. Govers (a cura di), Collision and Collapse at the Africa-Arabia-Eurasia Subduction Zone (pp. 133-154). London : Geological Society of London [10.1144/SP311.5].
Long-term evolution of the North Anatolian Fault: new constraints from its eastern termination
VILLA, IGOR MARIA;
2009
Abstract
The deformation and 40Ar–39Ar dating of recent volcanism, that remarkably sits across the North Anatolian Fault eastern termination in Turkey, together with previous studies, put strong constraints on the long-term evolution of the fault. We argue that after a first phase of 10 Ma, characterized by a slip rate of about 3 mm/a, and during which most of the trace was established, the slip rate jumped to about 20 mm/a on average over the last 2.5 Ma, without substantial increase of the fault length. The transition correlates with a change in the geometry at the junction with the East Anatolian Fault that makes the extrusion process more efficient.
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