asthenospheric flow in central europe: a new interpretation for cenozoic geodynamics?
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Asthenospheric flow in Central Europe: a new interpretation for Cenozoic geodynamics?
Kovács, I., Falus, Gy., Hidas, K., Szabó, Cs.
Models for the formation of the Pannonian Basin so far
(major driving mechanisms):
-Slab roll-back
-Plume(s)
-Gravitational instability
-asthenospheric flow
Slab roll-back
Slab roll-back
Slab roll-back
Slab roll-back
Horváth et al. 2006
Issues with „pure” slab roll-back model – I. Volcanism
Kovács & Szabó (2008)
Issues with pure slab roll-back model – II. Seismic tomography
Grad et al., (2006)
Issues with pure slab roll-back model – III. Gravity modeling
Szafián et al. (2006)
Issues with pure slab roll-back model – IV. Kinematic of extension
late Oligocene-early Miocene extrusion and mainly middle Miocene basin formation cannot be explained by subduction roll-back itself
differential stretching of the crust and lithospheric mantle cannot be explained by purely subduction driven extension (Houseman and Gremmer, 2007)
Huismans et al. (2006)
-Plume(s)
-Plume(s)
-Plume(s)
Wilson and Downes (1992)
Issues with pure plume moldel – I. Seismic tomography
Wortel and Spakman (2000)
Issues with pure plume moldel – II. Basaltic volcanism; III., Mantle temperature
Kovács et al. (submitted)
Gravitational instability model
- Does not explain temporal and spatial evolution and geochemistry of
volcanism
Houseman and Gremmer (2007)
Flower et al. (1998)
Collision induced asthenospheric flow
Flower et al. (1998)
Collision induced asthenospheric flow
Collision induced asthenospheric flow
Mo et al. (2006) Meissner et al. (2006)
Characteristics of collision driven asthenospheric flow
-extrusion and extension of overlying lithospheric blocks
-youngning volcanism with the distance from the collisional belt
-migration of depocenters away from the collisional belt as the flow advances
-deformation pattern of mantle xenoliths (with special respect to the asthenospheric portion)
-seismic anisotropy (?)
Application to the CPR – I. Volcanism
Pécskay et al.. (2006)
Application to the CPR – I. Volcanism
Application to the CPR – II. extension
Meulenkamp et al.. (1996)
Application to the CPR – III. Deformation patterns of mantle xenolits
Application to the CPR – III. Deformation patterns of mantle xenolits
SKS splitting results
1 sec Stuart et al. (2007)
Application to the CPR – IV. Seismic anisotropy
Application to the CPR – A model
Application to the CPR – A model
Thank your for your attention!!!
Rosenbaum et al., (2002)
OligoceneLower MioceneMiddle Miocene
Mantovani et al., (2002)
Late MioceneLate PliocenePresent
Mantovani et al., (2002)
Lundgren et al. (1998)
Collision induced asthenospheric flow
Barroul and Granet. (2002)
Collision induced asthenospheric flow
Application to the CPR – III. Deformation patterns of mantle xenolits
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