DOI: 10.1016/j.epsl.2020.116246
论文题名: Active crustal deformation and rotations in the southwestern Balkans from continuous GPS measurements
作者: D'Agostino N. ; Métois M. ; Koci R. ; Duni L. ; Kuka N. ; Ganas A. ; Georgiev I. ; Jouanne F. ; Kaludjerovic N. ; Kandić R.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 539 语种: 英语
中文关键词: active deformation
; GPS
; seismicity
; Southwestern Balkans
英文关键词: Clocks
; Deformation
; Geodetic satellites
; Global positioning system
; Kinematics
; Lithology
; Shear flow
; Velocity
; Active deformation
; Balkans
; Continental lithosphere
; Distribution of strength
; Paleomagnetic rotations
; Rotational component
; seismicity
; Vertical-axis rotation
; Rotation
; active fault
; collision zone
; crustal deformation
; geodetic network
; GPS
; kinematics
; seismicity
; subduction
; velocity profile
; Balkans
英文摘要: The western limb of the Hellenic Arc defines the boundary of a large intracontinental active extensional domain covering the Aegean and the southwestern part of the Balkan peninsula. Along this boundary a transition from collision in the north to subduction in the south is associated with post-Miocene clockwise rotations of ∼50∘. We present a new GPS velocity field that, with new permanent station velocities in Albania, Bulgaria, Kosovo, Montenegro, and Northern Macedonia, provides insights into previously unresolved aspects on the large-scale dynamics of continental lithosphere and on the relation between long and short-term kinematics. In particular we address (1) the kinematic description of the collision/subduction transition, (2) the relation between long-term finite rotations with geodetically-measured instantaneous rotations, (3) the forces maintaining and resisting the deformation of the extensional domain and (4) the extent of its northern boundary. We use the analogy of rigid elongate inclusions in the velocity field to predict the senses and approximate rates of rotation of crustal blocks in the deforming continental region. Across the collision/subduction transition zone a large rotational pattern in the velocity field is found whose spatial pattern and sense of rotation is compatible with the observed paleomagnetic rotations through the occurrence of fault-bounded block rotations. Geodetic observations show that clockwise vertical axis rotation of the western limb of the Hellenic margin is active today, with distribution and rates that are essentially the same as that defined by the paleomagnetic data for the last 5 Ma. The maximum rates of the rotational component of the velocity field is found along the wide arrangement of fault-bounded blocks in central Greece that accomodate the NE-SW dextral shear transferred from the northern Aegan trough. The northern limit of the rotating margin defines a hinge (Scutari-Pec transverse zone) that has remained stationary throughout the Middle Miocene (relative to the upper plate of the collision/subduction system) with important implications for the distribution of strength of the western margin of the Hellenic Arc. The distribution and style of deformation along the western boundary of the extensional domain is controlled by the relation between gravitational forces, driving the flow of crustal material towards the low-lying adjacent regions sea floor, and heterogeneous resistive forces along the collision/subduction boundary. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164933
Appears in Collections: 气候变化与战略
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作者单位: Osservatorio Nazionale Terremoti, Istituto Nazionale Geofisica Vulcanologia, Roma, Italy; Laboratoire de géologie de Lyon, Université de Lyon, Université Lyon 1, ENS de Lyon, France; Department of Seismology, Institute of Geosciences, Energy, Water and Environment, Tirana, Albania; National Observatory of Athens, Institute of Geodynamics, Athens, Greece; National Institute of Geophysics, Geodesy and Geography, Bulgarian Academy of Sciences, Sofia, Bulgaria; CNRS, ISTerre, Université Savoie Mont-Blanc, Le Bourget-du-Lac, France; Institute of Hydrometeorology and Seismology of Montenegro, Podgorica, Montenegro
Recommended Citation:
D'Agostino N.,Métois M.,Koci R.,et al. Active crustal deformation and rotations in the southwestern Balkans from continuous GPS measurements[J]. Earth and Planetary Science Letters,2020-01-01,539