A study of the crust stress field for the Aegean region (Greece)

Mitsakaki, C.; Sakellariou, Michael; Tsinas, Demitris

doi:10.1016/j.tecto.2012.10.003

Cited by 10 publications

(2 citation statements)

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“…A 3D FE model of 3000 hexahedral elements and nodes is set up by Lu et al [41] for the surface topology, major active fault zones and the stress field of the Chinese continent to study the mechanism of the long-distance jumping migration over active seismogenic areas. Shear zones are identified over regional-scale tectonic plates by 2D FEMs of faults and boundaries of tectonic plates [42]. By means of cascaded FE simulations, glacial isostatic adjustment is extended to investigate the relationship between glacial loading/ unloading and fault movement due to the spatial-temporal evolution of stresses [43].…”

Section: Introductionmentioning

confidence: 99%

Finite Element Models of Elastic Earthquake Deformation

Tung¹,

Masterlark²,

Lo³

2018

Earthquakes - Forecast, Prognosis and Earthquake Resistant Construction

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The Earth's surface deforms in response to earthquake fault dislocations at depth. Deformation models are constructed to interpret the corresponding ground movements recorded by geodetic data such GPS and InSAR, and ultimately characterize the seismic ruptures. Conventional analytical and latest numerical solutions serve similar purpose but with different technical constraints. The former cannot simulate the heterogeneous rock properties and structural complexity, while the latter directly tackles these challenges but requires more computational resources. As demonstrated in the 2015 M7.8 Gorkha, Nepal earthquake and the 2016 M6.2 Amatrice, Italy earthquake, we develop state-of-art finite element models (FEMs) to efficiently accommodate both the material and tectonic complexity of a seismic deformational system in a seamless model environment. The FEM predictions are significantly more accurate than the analytical models embedded in a homogeneous half-space at the 95% confidence level. The primary goal of this chapter is describe a systematic approach to design, construct, execute and calibrate FEMs of elastic earthquake deformation. As constrained by coseismic displacements, FEM-based inverse analyses are employed to resolve linear and nonlinear fault-slip parameters. With such numerical techniques and modeling framework, researchers can explicitly investigate the spatial distribution of seismic fault slip and probe other in-depth rheological processes.

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Section: Introductionmentioning

confidence: 99%

Finite Element Models of Elastic Earthquake Deformation

Tung¹,

Masterlark²,

Lo³

2018

Earthquakes - Forecast, Prognosis and Earthquake Resistant Construction

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“…This ridge is one of the major geomorphological features of the northern Evoikos Gulf, and is the surface expression of three major left-stepping (normal) fault segments: the Kamena Vourla, the Agios Konstantinos, and the Arkitsa faults (Roberts and Jackson, 1991;Ganas, 1997; Kranis, 1999) (Figure 2 and 3). While it is clear that the northern Evoikos Gulf occupies a zone of accommodation between the two tectonic provinces of the North Aegean Trough (the extension of the North Anatolian fault system) and the Gulf of Corinth (Mitsakaki et al, 2013; see Papanikolaou and Royden, 2007 for regional summary), the interaction between these provinces is not well understood. Recent GPS measurements indicate that the northern Evoikos Gulf is subject to a relatively low magnitude extensional strain field (Hollenstein et al, 2008) which, apparently contradicting the regional geomorphic evidence, should prohibit the development of large faults.…”

Section: Introductionmentioning

confidence: 99%

The Uplifted Terraces of the Arkitsa Region, NW Evoikos Gulf, Greece: A Result of Combined Tectonic and Volcanic Processes?

Papanastassiou

Cundy

Gaki-Papanastassiou

et al. 2014

The Journal of Geology

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14The Arkitsa-Kamena Vourla area of central Greece occupies a zone of accommodation 15 between the two tectonic provinces of the North Aegean Trough (the extension of the 16 North Anatolian fault system) and the Gulf of Corinth, and is characterised by a series 17 of very prominent tectonic landforms, notably the large (ca. 1000 m elevation) 18 footwall ridge of the Arkitsa-Kamena Vourla fault system. Despite the highly prominent 19 nature of this footwall ridge and the presence of very fresh tectonic landforms this 20 fault system is not known to have hosted any major historical earthquakes, and the 21 tectonic and geomorphic evolution of the Arkitsa-Kamena Vourla area remains poorly 22 constrained. This paper utilises a combined geomorphological, sedimentological and 23 macro-/micro-fossil approach to evaluate the Late Quaternary evolution of the Arkitsa 24 area, in the eastern part of the fault system, focussing on prominent uplifted terraces 25 present in the hangingwall of the Arkitsa fault. Three distinct raised glacio-lacustrine 26 terraces, and previously reported uplifted marginal marine deposits, suggest sustained 27 uplift of the coastline at a rate of 1 -1.5 mm/y over at least the last 40,000 years, 28 possibly to 75,000 BP. While movement on an offshore normal fault strand may 29 explain more recent coastal uplift, purely fault-driven longer-term uplift at this rate 30 requires anomalously high fault slip and extension rates. Consequently, the 31 development of the terraces and other geomorphic indicators of uplift may be at least 32 partly due to non-faulting processes, such as Quaternary (intrusive and/or extrusive) 33 volcanic activity associated with evolution of the nearby Lichades volcanic centre. 34 35

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