Investigation of the thermal structure and radiogenic heat production through aeromagnetic data for the southeastern Aegean Sea and western part of Turkey

Erbek, Ezgi; Dolmaz, M. Nuri

doi:10.1016/j.geothermics.2019.04.011

Cited by 15 publications

(12 citation statements)

References 27 publications

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“…Also, the distribution of the temperature within the earth's crust affects the active tectonics and seismicity [Bott 1982]. Previous studies carried out on the thermal structure in the region [Jongsma 1974;Fytikas 1980;Erbek and Dolmaz 2019] show that the Aegean region is characterized by higher than average continental heat-flow values because of the back-arc nature of the region. In Figure 8b, the heat flow map was extracted from previous study carried out by Erbek and Dolmaz [2019].…”

Section: Seismological Datamentioning

confidence: 99%

“…Then, Bilim et al [2016] calculated the CPD values and prepared heat flow maps for the Menderes Massif. Further, Erbek and Dolmaz [2019] examined the thermal structure and radiogenic heat production of the Aegean Sea and Aegean region through aeromagnetic data. They showed that the CPDs vary from 9.8 to 19.5 km whereas heat flow values vary between 50 and 125 mWm -2 .…”

Section: Introductionmentioning

confidence: 99%

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Determination of buried active faults and earthquake potential for Izmir and its surroundings (western Turkey) using aeromagnetic anomalies and seismological data

Erbek

Ateş

Dolmaz

2023

Annals of Geophysics

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The paper aims to delineate buried faults in Izmir city and its surroundings, western Turkey using aeromagnetic and seismological data. In this context, the geophysical data processing techniques including reduced‑to‑pole transform (RTP), power spectrum analysis, high-pass filter and second vertical derivative method (SVD) have been applied to the total field aeromagnetic data of the study area. First, to remove the undesirable effects caused by the dipolar nature of the Earth field, RTP transform has been applied to those data. Second, the average depths of the regional and residual sources in the region have been calculated as 16.84 km and 3.75 km, respectively using power spectrum analysis. After, to emphasize the effects of the residual anomalies, the high-pass filter has been applied to the RTP data. Finally, the second vertical derivative method (SVD) has applied to the filtered data for delineating the uncovering buried faults and their lineaments in the eastern part of the Aegean extension. The results from those methods show five major fault zones that could cause devastating earthquakes in the area. Especially, the study reveals for the first time that one of these faults which lies from Doganbey to the city center of Izmir in the literature actually reaches out to Manisa city in the NE direction. As a result, these lineaments can be evaluated as traces of buried faults could be an important clue in predicting earthquake potential. A comparison of seismicity map and the heat flow map shows that the region (between Cesme and Seferihisar) represented with a low b‑value has a high potential earthquake. The spatial distribution of the earthquakes, b‑values and heat flow values in the depths may be related to the existence thin lithospheric mantle. Furthermore, the region represented by strong aeromagnetic anomalies may be considered to be magmatic material arising from the magma filling inside the strike-slip faults. The fault structure observed on the SVD map are also important for the geothermal energy potential of the region as well.

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Section: Seismological Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Determination of buried active faults and earthquake potential for Izmir and its surroundings (western Turkey) using aeromagnetic anomalies and seismological data

Erbek

Ateş

Dolmaz

2023

Annals of Geophysics

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“…Heat and seismic activities have proven indicative of each other in many geothermal fields (Elbarbary et al, 2018;Erbek and Dolmaz, 2019). In order to find correlation of seismic activities with thermal structure in the study area, earthquakes were added onto the heat flow map (Fig.…”

Section: Correlation Of Seismic Activity With Thermal Structurementioning

confidence: 99%

“…For example, Oruc et al (2017) used the Parker-Oldenburg method to gain MD depth along a steady-state geothermal profile in Eastern Anatolia, Turkey, to provide the possible geodynamic mechanism in this area. CPD can be used to analyze heat distribution; Bilim et al (2016) and Erbek and Dolmaz (2019) got heat flow values through CPDs in Turkey. Herein, we use the Parker-Oldenburg method, which is a common inversion method (Parker, 1973;Oldenburg, 1974).…”

Section: Introductionmentioning

confidence: 99%

Heat Flow Distribution and Thermal Mechanism Analysis of the Gonghe Basin based on Gravity and Magnetic Methods

Wang

Zeng

Liu

et al. 2021

Acta Geologica Sinica (Eng)

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Geothermal resource is indispensable as a clean, renewable, stable and cheap resource. Nowadays in China, the Gonghe Basin, located in northeastern Qinghai Province, has been thought to be a promising geothermal area. To explore geothermal energy potential in and around the Gonghe Basin, geophysical means including magnetic and gravity methods were used to plot distribution. Firstly, we inversed Moho depth and Curie point depth in and around the basin using gravity and magnetic data, respectively, through an improved Parker-Oldenburg algorithm. Secondly, seven different thermal models were established, considering radiogenic heat, basement depth, anomalous heat source and simulated corresponding temperature field and heat flow. These were analyzed numerically and we found the high heat flow in the Gonghe Basin coacted with radiogenic heat, an anomalous heat source and conductive heat. The distribution of seismic activities indicates that the Langshan-Wuwei-Gonghe Fault might have provided channels for transporting heat effectively.

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“…The results were fairly compatible with the resistivity profiles and well data. Erbek and Dolmaz (2019) mentioned the relationship between seismogenic zone and high heat flow areas which were derived from CPD calculations.…”

Section: Introductionmentioning

confidence: 99%

Combined qualitative and quantitative regional interpretation of the thermal results of magnetic data in the Eastern Mediterranean Region

Özsöz¹

2021

Turkish J Earth Sci

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The study presents thermal structure and active-passive tectonic parts of the Eastern Mediterranean Region. Curie point depth, heat flow map, Moho depth and sediment thickness are used for interpretation. The levelled magnetic data that obtained from the World Digital Magnetic Anomaly Map (WDMAM) is used. The magnetic anomaly is divided into 39 zones for Curie point depth estimation. The Curie point depth values are calculated into Fourier domain. Then heat flow map is generated. The estimated Curie point depth values are ranging from 4.5 km to 25 km. Furthermore, heat flow values are between 55 mW/m 2 and 277 mW/m 2 . Moho depth, Moho depth-Curie depth and sediment thickness are used for constraining interpretation. Interpretation indicates that the northern and southern parts of the Mediterranean ridge present different thermal characteristics.

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Investigation of the thermal structure and radiogenic heat production through aeromagnetic data for the southeastern Aegean Sea and western part of Turkey

Cited by 15 publications

References 27 publications

Determination of buried active faults and earthquake potential for Izmir and its surroundings (western Turkey) using aeromagnetic anomalies and seismological data

Determination of buried active faults and earthquake potential for Izmir and its surroundings (western Turkey) using aeromagnetic anomalies and seismological data

Heat Flow Distribution and Thermal Mechanism Analysis of the Gonghe Basin based on Gravity and Magnetic Methods

Combined qualitative and quantitative regional interpretation of the thermal results of magnetic data in the Eastern Mediterranean Region

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