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23/01 Geolunch : Olivier Cavalié (Univ. Nice)

(salle de réunion 203, batiment Géode, du 23/01/2015 12:30 au 23/01/2015 13:30)
When Jan 23, 2015
from 12:30 to 01:30
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Interseismic strain accumulation at the North/East Anatolian faults triple junction : toward plate tectonic measurement by InSAR

The question whether continental plates deform internally or move as rigid blocks has been debated for several decades. To further address this question, we use large-scale interferometric synthetic aperture radar (InSAR) data sets to study how eastern Anatolia and its surrounding plates deform. We find that most of the deformation is focused at the North and East Anatolian faults and little intraplate deformation takes place. Anatolia is therefore moving, at least its eastern part, as a uniform block. We estimate the slip velocity and locking depth of the North Anatolian fault at this location to be 20 mm/yr and 14 km, respectively. High deformation gradient found near the East Anatolian fault, on the other hand, suggests that little stress is accumulating along the eastern sections of that fault. As InSAR data cross the whole Anatolia on its eastern end, we tried for the first time to infer the Euler pole of Anatolia from InSAR.

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