New geodetic constraints on the role of faults and blocks vs. distribute strain in the Nubia-Arabia-Eurasia zone of active plate interactions

Turkish Journal of Earth Sciences

article

ERGİNTAV, SEMİH¹  FLOYD, MICHAEL²  PARADISSIS, DEMITRIS³  KARABULUT, HAYRULLAH⁴  VERNANT, PHILIPPE⁵  MASSON, FREDERIC⁶  GEORGIEV, IVAN⁷  KONCA, ALİ ÖZGÜN⁴  DOĞAN, UĞUR⁸  KING, ROBERT²  REILINGER, ROBERT² 

[1] Department of Geodesy, Kandilli Observatory and Earthquake Research Institute, Boğaziçi University;Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology;Department of Topography, National Technical University of Athens;Department of Geophysics, Kandilli Observatory and Earthquake Research Institute, Boğaziçi University;Geosciences Laboratory, University of Montpellier;Institute of Physics of the Globe, University of Strasbourg;National Institute of Geophysics, Geodesy and Geography, Bulgarian Academy of Sciences;Department of Geomatics Engineering, Yıldız Technical University

关键词: Anatolia;    Aegean;    GNSS deformation;    subduction;    geodynamics;    Mediterranean;   

DOI  :  10.55730/1300-0985.1842

学科分类：地球科学(综合)

来源: Scientific and Technical Research Council of Turkey - TUBITAK

【 摘 要 】

We present a broad view of present-day motions and deformations derived from uniform processing of GNSS observations within the Nubia-Arabia-Eurasia zone of plate interaction. The new observations we present provide a ~29% increase in the number of velocity determinations, a reduction in average station spacing from ~76 km to ~39 km, and an improvement in velocity uncertainties (for ~126,000 km2, bounded by the North and East Anatolian Faults exhibits internal velocity differences of < 0.5 mm/year, indicating strain rates of < ~1.5 nanostrain/year. Geodetically constrained fault slip rates obtained from this simplified approach are comparable to geologic rates, indicating that major faults have controlled the recent geologic evolution of the region (i.e. 5?10 Myr). The pattern of present-day deformation, including increasingly fast motions towards the Hellenic trench, and the roughly simultaneous opening of all the major Mediterranean basins in the early Miocene with the slowing of the Nubia-Eurasia convergence, support conceptual models that foundering and rollback of the subducted Nubian slab beneath the Aegean is the primary mechanism responsible for present-day motion and internal deformation of the Anatolian-Aegean region.

【 授权许可】

Unknown