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Article Citation - WoS: 6Citation - Scopus: 5Geothermal Prospectivity of the Bigadic Basin and Surrounding Area, Nw Anatolia, Turkey, by the Spectral Analysis of Magnetic Data(Springer Basel Ag, 2021) Bilim, Funda; Aydemir, Attila; Ates, AbdullahThe Curie Point Depths (CPDs) are estimated from the spectral analysis of magnetic data in order to determine the geothermal potential of the Bigadic Basin and its surrounding region in NW Anatolia, Turkey. The estimated CPD range is from 7 to 17-18 km. The shallowest depth (7 km) lies to the north of Balikesir. The estimated geothermal gradient and heat flow values range from 33 to 80 degrees C/km, and 83 to 200 mWm(-2), respectively. All results in the study area support the previous studies from the geological or geophysical investigations for western Anatolia by other researchers. High temperatures may be resulted indirectly from the continental collision and consequent thermal relaxation and/or heating from the interiors of the Earth due to the mantle delamination or asthenospheric upwelling in response to lithospheric extension in the western Anatolia. The high heat flow and shallow CPDs can also be associated with the magmatic rocks as a consequence of the recent tectonic extension and granitoids in the studied region.Article Citation - WoS: 2Citation - Scopus: 3Interpretation of Aeromagnetic Data of the Sivas Basin in the Central Eastern Turkey(Tubitak Scientific & Technological Research Council Turkey, 2021) Bilim, Funda; Aydemir, AttilaThe Sivas Basin is located in the eastern part of the central Anatolia. In this study, aeromagnetic data in the basin and surrounding area are processed and anomalies are interpreted to determine the approximate locations of the causative bodies and reveal their relationship with the tectonic trends. The sedimentary basin is surrounded by strong magnetic anomalies from the south, east, and northeast. The most apparent anomalies are observed in the E-NE of Zara, SW of Divrigi, and north of Kangal. These anomalies do not present significant directional change when they are reduced to the pole process. Causative bodies of the southern anomalies around Divrigi and Kangal extend from NE to SW and the northerly anomaly trend (to the north of Kangal) crosses the southern one (Divrigi trend) in the analytic signal map. These trends are well-defined by the maxima points of the horizontal derivatives and these maxspots generally follow the boundaries of anomalies in the tilt angle snap. The Kangal Fault controls the extensions of the Divrigi anomalies through the north and they are not observed in the area to the north of the fault. The Hafik Anomaly in the north of the study area is also differentiated from the anomaly group in the E-NE of Zara precisely, defining that they are created by 2 different causative bodies. Aeromagnetic characteristics of the ophiolites to the south indicate that they have different origin from the northern ophiolites group. Similarly, it is determined that the plutonic rocks in the south and north are also different origin emplacements, considering their aeromagnetic responses, mineral contents, and ore deposit possibilities.
