Gravity anomalies of the Cyprus Arc and their tectonic implications

Ergün, Mustafa; Okay, Seda; Sarı, Coşkun; Oral, Ersel Zafer; Ash, Michael R.; Hall, Jérémy; Miller, Hugh G.

doi:10.1016/j.margeo.2005.03.004

Cited by 32 publications

(38 citation statements)

References 25 publications

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“…The maximum value of the signal is found in correspondence of the Cyprus arc and on the boundary between the Levantine and the Herodotus basins. The former signal is due to the presence of a crustal plate subducting beneath Cyprus [36], while the latter can be attributed to the presence of localize ophiolites structures [27,37].…”

Section: The Levant Case Study: Data Reductionmentioning

confidence: 99%

“…Both the geometry up to a depth of 40 km and the density contrast, fixed at 380 kg/m 3 , of such a model are taken from [36], and the corresponding gravitational effect has been obtained by means of a point mass approximation, i.e., by discretizing the plate with a set of about 6000 point masses, and summing up the effect of each point mass. The reduced signal is shown in Figure 4b.…”

Section: The Levant Case Study: Data Reductionmentioning

confidence: 99%

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Moho Depth and Crustal Architecture Beneath the Levant Basin from Global Gravity Field Model

Sampietro¹,

Mansi

Capponi

2018

Geosciences

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Abstract:The study of the discontinuity between the Earth crust and upper mantle, the so-called Moho, and of the lithospheric architecture in general, has several important applications in exploration geophysics. For instance, it is used to facilitate the inversion of seismic-related data, in order to obtain important information on the sedimentary layers or to study the Earth's heat flux. In this paper, the Levant crustal structure is being investigated starting from the inversion of gravity disturbances coming from a global geopotential field model based on ESA GOCE satellite mission integrated with seismic derived information. In the considered area, which is of particular interest because of its richness from the resources point of view, the deep crustal structure is still a matter of study due to the presence of a thick sequence of sedimentary layers, deposited within geological eras by the Nile River. Within the current work, the shape of the Oceanic domain in correspondence to the Herodotus Basin and the Cyprus Arc has been clearly defined. Moreover the nature of the Levantine Basin and of the Eratosthenes crust has been investigated by a set of ad hoc tests, finding the presence of continental crust. Finally, the Moho depth and the crustal density distribution have been retrieved. Several localized anomalies, in the Cyprus area, have been identified and modelled too, thus confirming the presence of heavy material, with a thickness up to 10 km, in the sedimentary layer and shallower part of the crust.

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Section: The Levant Case Study: Data Reductionmentioning

confidence: 99%

Section: The Levant Case Study: Data Reductionmentioning

confidence: 99%

Moho Depth and Crustal Architecture Beneath the Levant Basin from Global Gravity Field Model

Sampietro¹,

Mansi

Capponi

2018

Geosciences

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“…Most of the studies including crustal models in recent years have been made using deep seismic sounding (DSS) data (e.g., Arita et al, 1998;Grabowska et al, 1998;Ergun et al, 2005;d'Acremont et al, 2006). Even though we do not have DSS data, we do attempt to define the interval values of the crust in the study area.…”

Section: Analysis and Interpretationmentioning

confidence: 99%

An aspect of the subsurface structure of the Burdur-Isparta area, SW Anatolia, based on gravity and aeromagnetic data, and some tectonic implications

Dolmaz

2007

Earth Planet Sp

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Gravity and aeromagnetic analyses were conducted in the Burdur-Isparta area of Turkey in order to identify the subsurface structure and tectonics of the region independent of surface cover. The analytic signal of the aeromagnetic anomalies was first calculated to delineate the source fields of these anomalies. The magnetic signatures were found to correlate well with the intrusives associated with the subduction of the African oceanic lithosphere and with the ophiolitic nappes in the region. The residual aeromagnetic anomalies mostly orientate in the N-S direction, implying the presence of remanent magnetization. Based on the shape analysis of aeromagnetic anomalies, the region appears to have rotated clockwise. The magnetic anomalies were found to continue upward to 5 km a.s.l. The upward continued map shows deep effects of the sub-crustal magnetic sources. Based on the Bouguer gravity anomalies, the thickness of the crust in the study area is between 33 and 37.5 km. Major extensive NE-and NW-as well as N-trending faults are identified that coincide with the Lake Burdur, Lake Beysehir and Kovada grabens, respectively. Lake Egirdir is also devoid of any magnetic sources. As a final step, the maxima of the horizontal gradient of the gravity data were calculated. The maxima show that the major geological formations and the structural trends in the area are remarkable. The boundaries of the various geological formations can be identified based on the boundary analysis of the gravity and the analytic signal of the aeromagnetic data. The change in the nature of the anomalies reflects the imprints of intense deformation associated with major tectonic activity of the African-Eurasian plate convergence zone.

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“…One can find different information in the literature. The estimates go from 25 m [13] to 1500 m or even more [7]. So, it is difficult to draw any conclusions.…”

Section: Introductionmentioning

confidence: 99%

Influence of sedimentary layering on tsunami generation

Dutykh¹,

Dias²

2010

Computer Methods in Applied Mechanics and Engineering

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The present article is devoted to the influence of sediment layers on the process of tsunami generation. The main scope here is to demonstrate and especially quantify the effect of sedimentation on vertical displacements of the seabed due to an underwater earthquake. The fault is modelled as a Volterra-type dislocation in an elastic half-space. The elastodynamics equations are integrated with a finite element method. A comparison between two cases is performed. The first one corresponds to the classical situation of an elastic homogeneous and isotropic half-space, which is traditionally used for the generation of tsunamis. The second test case takes into account the presence of a sediment layer separating the oceanic column from the hard rock. Some important differences are revealed. We conjecture that deformations in the generation region may be amplified by sedimentary deposits, at least for some parameter values. The mechanism of amplification is studied through careful numerical simulations.Comment: 17 pages, 12 figures. Revised version for Computer Methods in Applied Mechanics and Engineering. Other author's papers can be downloaded from http://www.lama.univ-savoie.fr/~dutykh

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Gravity anomalies of the Cyprus Arc and their tectonic implications

Cited by 32 publications

References 25 publications

Moho Depth and Crustal Architecture Beneath the Levant Basin from Global Gravity Field Model

Moho Depth and Crustal Architecture Beneath the Levant Basin from Global Gravity Field Model

An aspect of the subsurface structure of the Burdur-Isparta area, SW Anatolia, based on gravity and aeromagnetic data, and some tectonic implications

Influence of sedimentary layering on tsunami generation

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