Bouguer anomalies and crustal structure in the Eastern Mediterranean

Riad, S.; Refai, E.; Ghalib, M.

doi:10.1016/0040-1951(81)90070-6

Cited by 23 publications

(10 citation statements)

References 4 publications

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“…In approximate terms, we suggest, based on the Bouguer gravity data, the presence of an anomalous dense, thicker crust varying between 33 and 37.5 km in thickness in the study area. The thickness of the crust was also found to be approximately 36 km based on Bouguer gravity data from southern Turkey (Riad et al, 1981). Inversion of the magnetotelluric data across the Taurides of SW Anatolia provided an invaluable insight into the variations in depth of the transition from resistive upper crust to conductive lower crust (Gurer et al, 2004).…”

Section: Analysis and Interpretationmentioning

confidence: 94%

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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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Section: Analysis and Interpretationmentioning

confidence: 94%

“…We use here the Bouguer anomaly map to determine the thickness of the crust (Riad et al, 1981). The relation with the average gravity and the thickness of the crust is given by Riad et al (1981):…”

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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“…Riad et al 1981;Riad and El Etr 1985;Rivero et al 2002;Tirel et al 2004) to calculate crustal thicknesses from the gravity anomalies. Most optimum relation for the crustal thickness of Turkey is the equation given by Riad et al (1981) as follows:…”

Section: Gravity Anomalies and Interpretationmentioning

confidence: 99%

Crustal Structure of Turkey from Aeromagnetic, Gravity and Deep Seismic Reflection Data

et al. 2012

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In this paper, aeromagnetic and gravity anomalies obtained from the General Directorate of Mineral Research and Exploration were subjected to upward continuation to 3 km from the ground surface to suppress shallow effects and to expose only regional, deep sources. Then, a reduction to pole (RTP) map of aeromagnetic anomalies was produced from the 3 km upward continued data. A sinuous boundary to the south of Turkey is observed in the RTP map that may indicate the suture zone between the Anatolides and African/Arabian Plates in the closure time of the Tethys Ocean. The sinuous boundary can be correlated with the recent palaeo-tectonic maps. The southern part of the sinuous boundary is quite different and less magnetic in comparison with the northern block. In addition, maxspots maps of the aeromagnetic and gravity anomalies were produced to find out and enhance the boundaries of tectonic units. Crustal thickness, recently calculated and mapped for the western Turkey, is also extended to the whole of Turkey, and the crustal thicknesses are correlated with the previous seismological findings and deep seismic sections. The average crustal thickness calculations using the gravity data are about 28 km along the coastal regions and increase up to 42 km through the Iranian border in the east of Turkey. Density and susceptibility values used as parameters for construction of two-dimensional (2D) gravity and magnetic models A. Ates were compiled in a table from different localities of Turkey. 2D models indicate that all of the anomalous masses are located in the upper crust, and this could be well correlated with the earthquakes which occurred at shallow depths.

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“…It is possible to find out different empirical equations proposed by different authors in the literature to calculate crustal thicknesses from the gravity anomalies (ie., Riad et al, 1981;Riad and El Etr, 1985;Rivero et al, 2002;Tirel et al, 2004). The equation given by Riad et al (1981) was preferred in this investigation because the following Equation (1) was tested in Turkey by Ates et al (2012) and, its accuracy was verified by correlating with all previous crustal thickness investigation results in the onshore areas (Ates et al, 2012):…”

Section: Methodsmentioning

confidence: 92%

Crustal thickness variations in the Eastern Mediterranean and southern Aegean region

Bilim

Aydemir²,

Ateş

2016

Marine and Petroleum Geology

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Bouguer anomalies and crustal structure in the Eastern Mediterranean

Cited by 23 publications

References 4 publications

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

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

Crustal Structure of Turkey from Aeromagnetic, Gravity and Deep Seismic Reflection Data

Crustal thickness variations in the Eastern Mediterranean and southern Aegean region

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