Offshore Faulting in the Aegean Sea: A Synthesis Based on Bathymetric and Seismic Profiling Data

Sakellariou, D.; Tsampouraki-Kraounaki, Konstantina

doi:10.12681/bgsg.11712

Cited by 10 publications

(4 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The enhanced localization of the North Anatolian Shear Zone in the North Aegean Domain evidenced here at 2-1.3 Ma coincides with the Early Pleistocene increase in slip-rates along the North Anatolian Fault (Hubert Ferrari et al 2010 ). The localization of the North Anatolian Fault therefore contributed to the Early Pleistocene change in stress regime recorded over the entire Aegean, pre viousl y attributed to a change in the dynamics of the Hellenic Subduction Zone (Lyberis 1984 ;Mascle & Martin 1990 ;Armijo et al 1992 ;Sakellariou & Tsampouraki-Kraounaki 2016 ).…”

Section: The Plio-pleistocene Transition From a Wide North Anatolian ...mentioning

confidence: 52%

Evolution of the North Anatolian Fault from a diffuse to a localized shear zone in the North Aegean Sea during the Plio-Pleistocene

Rodriguez,

Sakellariou,

Gorini

et al. 2023

Geophysical Journal International

View full text Add to dashboard Cite

Summary The North Anatolian Fault is the ∼1200-km-long active continental transform boundary between Anatolia and Eurasia. This strike-slip system initiated around 10-12 Ma and experienced diachronous episodes of strain localization along its strike. The structural evolution of the ∼350-km-long fault segments crossing the North Aegean Sea remains to be accurately investigated. There, the modern North Anatolian Fault is localized along two main branches: the northern branch ends at the North Aegean Trough and the southern branch ends at the Edremit-Skyros Trough. The Evia Basin is located in the North Aegean Domain between the North Anatolian Fault and the Corinth Rift. This study presents seismic reflection lines crossing the aforementioned structures of the North Aegean Domain, which document their subsurface structure and the sedimentary record of their activity since the Messinian. The seismic-reflection dataset is tied to regional-scale stratigraphic markers, which constrains the age of main tectonic events related to the formation of the North Anatolian Fault. The seismic-reflection lines show that the two main branches of the North Anatolian Fault became localized structures at 1.3-2 Ma, coevally with the formation of the Evia Basin. Since 2 Ma, the North Aegean Troughs developed as a series of horsetail basins propagating westwards at the termination of the branches of the North Anatolian Fault. On a regional scale, the wide and diffuse North Anatolian transtensive shear zone active from Serravalian to Late Pliocene turned into a narrower shear zone at the two main branches of the North Anatolian Fault since the Early Pleistocene. This abrupt episode of strain localization occurred in the frame of the major Early Pleistocene change in stress regime from NE-SW to N-S extension, which has been observed throughout the Aegean Sea.

show abstract

Section: The Plio-pleistocene Transition From a Wide North Anatolian ...mentioning

confidence: 52%

Evolution of the North Anatolian Fault from a diffuse to a localized shear zone in the North Aegean Sea during the Plio-Pleistocene

Rodriguez,

Sakellariou,

Gorini

et al. 2023

Geophysical Journal International

View full text Add to dashboard Cite

show abstract

“…As the animals grow, they likely move to deeper waters, where vision is not so vital, so other senses become more important, such as olfaction (larger olfactory bulbs), which becomes a dominant sense for the search of prey and mates (Kotrschal et al ., 1998; Lisney et al ., 2007). Our samples came from the Cyclades Islands, in the Southern Aegean Sea, a plateau where depths are greatly restricted, which are highly divergent from the environment of the bathyal Northern Aegean Sea (Sakellariou & Tsampouraki-Kraounaki, 2016). Therefore, we speculate that in the studied area, the populations of S. canicula possibly follow life history patterns that resemble relatively closely those of the Atlantic Ocean and West Mediterranean populations, with segregations by size and the presence of nurseries in shallower waters.…”

Section: Discussionmentioning

confidence: 99%

Ontogenetic shifts and sexual dimorphism in the brain organization of the small-spotted catshark Scyliorhinus canicula

Roussos

Megalofonou

2021

J. Mar. Biol. Ass.

View full text Add to dashboard Cite

In this study, we investigated ontogenetic and sexual changes of the brain scaling as well as the scaling and the relative size of six major brain areas in the small-spotted catshark Scyliorhinus canicula from the Mediterranean Sea. The brain somatic index (0.31–1.25%) did not differ significantly between sexes but was significantly affected by size with smaller specimens exhibiting higher values. Brain growth exhibited negative allometry (allometric coefficient 0.634), not affected by sex or maturity status. The brain growth rate was found to be higher compared with a previous study from the Atlantic Ocean. Regarding the scaling of the brain areas, the olfactory bulbs scaled with positive allometry, the telencephalon and the diencephalon scaled with the same rate of negative allometry, the mesencephalon exhibited even higher negative allometry, while the cerebellum and the medulla oblongata both followed a close-to-isometric growth pattern. Immature S. canicula possessed a larger mesencephalon and diencephalon, highlighting the importance of vision in this life period, while mature specimens had enlarged olfactory bulbs, indicating that olfaction may be more important after the animal attains sexual maturity. In respect of sexual dimorphism, males had a larger cerebellum and medulla oblongata, while females had enlarged telencephalon and olfactory bulbs.

show abstract

“…The Samos (Néon Karlovasion) Mw 7.0 earthquake occurred on a moderately N-dipping, nearly E-W striking fault plane offshore the island of Samos 33 – 35 , directly on-strike with the prominent Kuşadası fault system on the Anatolian coast at the westward extent of the active Büyük Menderes graben, (Fig. 2 ), which belongs to the Menderes graben system.…”

Section: Deformation Of the Upper Platementioning

confidence: 99%

Greece and Turkey Shaken by African tectonic retreat

Meng

Sinoplu

Zhou

et al. 2021

Sci Rep

View full text Add to dashboard Cite

Earthquakes are a consequence of the motions of the planet’s tectonic plates, yet predicting when and where they may occur, and how to prepare remain some of the shortcomings of using scientific knowledge to protect human life. A devastating Mw 7.0 earthquake on October 30, 2020, offshore Samos Island, Greece was a consequence of the Aegean and Anatolian upper crust being pulled apart by north–south extensional stresses resulting from slab rollback, where the African plate is subducting northwards beneath Eurasia, while the slab is sinking by gravitational forces, causing it to retreat southwards. Since the retreating African slab is coupled with the overriding plate, it tears the upper plate apart as it retreats, breaking it into numerous small plates with frequent earthquakes along their boundaries. Historical earthquake swarms and deformation of the upper plate in the Aegean have been associated with massive volcanism and cataclysmic devastation, such as the Mw 7.7 Amorgos earthquake in July 1956 between the islands of Naxos and Santorini (Thera). Even more notable was the eruption of Santorini 3650 years ago, which contributed to the fall of the Minoan civilization. The Samos earthquake highlights the long historical lack of appreciation of links between deep tectonic processes and upper crustal deformation and geological hazards, and is a harbinger of future earthquakes and volcanic eruptions, establishing a basis for studies to institute better protection of infrastructure and upper plate cultures in the region.

show abstract

Offshore Faulting in the Aegean Sea: A Synthesis Based on Bathymetric and Seismic Profiling Data

Abstract: Twenty five years after a first attempt by Mascle and Martin (1990)

Cited by 10 publications

References 27 publications

Evolution of the North Anatolian Fault from a diffuse to a localized shear zone in the North Aegean Sea during the Plio-Pleistocene

Evolution of the North Anatolian Fault from a diffuse to a localized shear zone in the North Aegean Sea during the Plio-Pleistocene

Ontogenetic shifts and sexual dimorphism in the brain organization of the small-spotted catshark Scyliorhinus canicula

Greece and Turkey Shaken by African tectonic retreat

Contact Info

Product

Resources

About