Crustal structure from the Hecataeus Rise to the Levantine Basin, eastern Mediterranean, from seismic refraction and gravity modelling

Welford, J. Kim; Hall, Jérémy; Rahimi, Armin; Reiche, Sönke; Hübscher, Christian; Louden, K. E.

doi:10.1093/gji/ggv422

Cited by 10 publications

(5 citation statements)

References 37 publications

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“…The subduction is still active in spite of the incipient collision with the Eratosthenes Seamount, with near frontal convergence at a 6.0 mm/yr rate southwest of Cyprus. The locking depth (z1) extends from the surface to 20 km depth, which is consistent with Welford et al (2015); Feld et al (2017). We find a nearly pure left-lateral strike-slip motion on Kyrenia fault with a rate of 3.5-4.2 mm/yr, suggesting a nearly perfect shear partitioning between the subduction and Kyrenia range.…”

Section: Cyprus Subductionsupporting

confidence: 82%

“…The boundary between Anatolia and Malatya block is also simplified as a vertical fault. However, to generate the geometry of dipping faults, such as the Cyprus subduction and Kyrenia fault, we followed published interpretations of seismic profiles (Aksu et al, 2005(Aksu et al, , 2021Burton-Ferguson et al, 2005;Aksu et al, 2014a;Calon et al, 2005;Hall et al, 2005;Welford et al, 2015;Feld et al, 2017). We utilized, moreover, the seismicity of the region, compiling the earthquakes greater than Mw = 2.8.…”

Section: Figure4mentioning

confidence: 99%

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Kinematics of the Kahramanmaraş Triple Junction and of Cyprus: Evidence of Shear Partitioning

Özbey

Şengör

Henry³

et al. 2023

Preprint

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Section: Cyprus Subductionsupporting

confidence: 82%

Section: Figure4mentioning

confidence: 99%

Kinematics of the Kahramanmaraş Triple Junction and of Cyprus: Evidence of Shear Partitioning

Özbey

Şengör

Henry³

et al. 2023

Preprint

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“…The fault coupling model of the Cyprus arc subduction is characterized by full locking from the surface to 20 km, which is consistent with Welford et al (2015); Feld et al (2017), transitioning to partial locking between 20 and 30 km. The seismic activity during the instrumental period aligns with our coupling model, with the majority of earthquakes occurring within the 12-20 km depth range of the Cyprus subduction zone (see Fig.…”

Section: Cyprus Subduction Kyrenia Range and Taurussupporting

confidence: 66%

“…The boundary between the Anatolia and Malatya blocks is simplified as a vertical fault. However, to generate the geometry of dipping faults, such as the Cyprus subduction and Kyrenia fault, we followed published interpretations of seismic profiles (Aksu et al, 2005(Aksu et al, , 2021Burton-Ferguson et al, 2005;Aksu et al, 2014a;Calon et al, 2005;Hall et al, 2005;Welford et al, 2015;Feld et al, 2017). In addition, we utilized the seismicity of the region to compile earthquakes greater than Mw = 2.8.…”

Section: Figure6mentioning

confidence: 99%

Kinematics of the Kahramanmaraş triple junction and of Cyprus: evidence of shear partitioning

Özbey,

Sengör,

Henry

et al. 2024

BSGF - Earth Sci. Bull.

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Triple junctions involving non-subductable plates extend beyond local implications, crucial for studying the geology of convergent plate boundary zones. However, kinematic models overlook Cyprus-Anatolia motion due to limited geodetic constraints. Our study area comprises Cyprus, southern Turkey, and the Levant coast, focusing on the Kahramanmaraş triple junction where a destructive earthquake sequence occurred on February 6, 2023. We present precise positioning data merged with published velocities, constructing an up-to-date velocity field for the interseismic period. Employing two kinematic approaches, we analyze its tectonic implications. In Cyprus, we find the relative motion of Africa (Sinai Plate) and Anatolia is partitioned between convergence in the Cyprus subduction, with rate 3.5-6.2 mm/yr, progressively decreasing from west to east and left-lateral transpressive Kyrenia fault, situated along the northern coast of Cyprus, with rate 3.3-4.2 mm/yr. The relative strike-slip motion between Arabia and Anatolia is partitioned between the East Anatolian Fault (slip rates 5.2-6.2 mm/yr) and some secondary faults such as Çardak and Malatya faults (slip rates 2.0-1.7 mm/yr respectively) and causes distributed deformation for a 50-60 km wide region. The largest second invariant strain rate tensors from the continuum kinematic model also coincide with the same region which can be defined as the East Anatolian shear zone. A shear partitioning system exists around the Kahramanmaraş triple junction, from Cyprus to southeast Turkey. The Levant Fault has a 3.5-4.7 mm/yr left-lateral slip rate, decreasing northward as part of it is transferred to offshore faults. Strain rates appear to be relatively small in the Taurus range and Adana/Cilicia basin, transitioning from extensional/transtensional to compressional from east to west. The up component of GNSS velocities on the Taurus karstic plateau reaches 1.2 mm/yr, lower than Quaternary uplift rates on its southern edge. We examine Taurus uplift and Adana/Cilicia basin subsidence, considering slow convergence through earthquake distribution, seismic tomography, and modeling.

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“…It constitutes the southern deformation front of the Cyprus Arc separating the Levantine Basin in the south from the Cyprus Basin in the north. In the east, the expression of the ridge changes to a number of narrow, northeast-trending ridges and basins (Hall et al 2005;Welford et al, 2015).…”

Section: -2mentioning

confidence: 99%

Geothermal flow and water-load seafloor depth of the Eastern Mediterranean Sea

Jbeily

Verdoya

Chiozzi

et al. 2019

AIP Conference Proceedings

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We used bathymetry, sediment thickness and terrestrial heat-flow data to investigate the nature of the Eastern Mediterranean Sea lithosphere. We processed bathymetric data by removing the subsidence caused by sediment deposition to obtain the water-loaded seafloor depth. Terrestrial heat flow measurements were corrected for sedimentation and climatic changes to infer the purely conductive steady-state geothermal flow. Water-load seafloor depths and thermal data were then compared to reference models of continental lithosphere stretching and ocean plate cooling. The results argue that the Levantine Basin is floored by a continental stretched crust that thinned by a factor of 1.6-2.7, whereas the Herodotus Basin crust is of oceanic type. The water-loaded seafloor depths in all the Eastern Mediterranean are consistent with geological ages of > 250 Ma. The mantle heat flow in the Herodotus Basin (33 mW m-2) is consistent with that of the oceanic Ionian lithosphere, whereas in the Levantine Basin (26 mW m-2) is comparable to that of the Sinai continental microplate.

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Crustal structure from the Hecataeus Rise to the Levantine Basin, eastern Mediterranean, from seismic refraction and gravity modelling

Cited by 10 publications

References 37 publications

Kinematics of the Kahramanmaraş Triple Junction and of Cyprus: Evidence of Shear Partitioning

Kinematics of the Kahramanmaraş Triple Junction and of Cyprus: Evidence of Shear Partitioning

Kinematics of the Kahramanmaraş triple junction and of Cyprus: evidence of shear partitioning

Geothermal flow and water-load seafloor depth of the Eastern Mediterranean Sea

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