Mantle flow uplift of western Anatolia and the Aegean: Interpretations from geophysical analyses and geodynamic modeling

摘要: [1] The Western Anatolian and Aegean region demonstrates a complex geologic history of horizontal vertical tectonics. Active normal faulting exhumation zones indicate that Anatolia has experienced significant extension since the Oligocene-Early Miocene (∼30 Ma). Our geophysical analyses demonstrate is also uplifted relative to an elevation would be expected given isostatic response lithosphere structure. Namely, topography “residuals” residual uplift about 1500 m over ∼200 km sections Aegean. Admittance functions between free-air gravity regional isostatically uncompensated as it approaches ∼50 mGal/km at longest wavelengths, likely owing underlying mantle flow component. Using forward geodynamic modelling we consider idealized section based on tomographic inversions examine magnitude pattern surface reconcile with observables. The models consistently show plateau-type (and extension) through amplitude wavelength consistent calculations. Together, provide independent quantitative evidence thin Anatolian-Aegean being buoyed upwards by flow. may associated active delamination beneath region; process explain ongoing crustal extension.