Geophysical Analysis and Modelling of the Si̇mav Basin, Western Anatolia

Abstract

The various data processing techniques, to illuminate the parameters of the geological structure which are applied in gravity and magnetic potential field methods. Also edge detection procedures are in data processing techniques. In this study, 2D, 3D, inversion and asta technique is one of the new edge detection procedures were applied to clarify correlation between the Simav half graben's deep position and geometry of the tectonic lineaments. The Asta is obtained using the tilt angle. Bulletin of the Mineral Research and Explorationhttp://bulletin.mta.gov.tr

THE NAŞA INTRUSION and it’s TECTONIC IMPLICATION

“…The gravity map has a high resolution and the conceptual model of the graben is supported by the data (Toker, 2014). The depth of the infi ll of the graben reaches 1200-1300 m in the model by means of two dimensional gravity inverse solution.…”

“…The data vary between -55 and -75 mGal (Figure 5b). In the gravity map, the value ranges between -60 and -64 mGal represent granitoids, and the values ranging between -72 and -74 mGal represent gneisses which extend along the lower edge of the graben (Toker, 2014). Blue areas in fi gure 5b present the gravity effect of the Quaternary alluvial fi ll.…”

“…In the east of the Simav basin, the corner structure created by the intersection of the Simav fault and the Naşa Fault zone, (Figure 4, inside the white circle) is clearly observed in the data (Toker, 2014).…”

“…The gravity data of the Simav Graben were evaluated by both the conventional approach (Demirbaş and Uslu, 1984) and imaging techniques (Toker, 2014). The moving standard deviation (MSD) fi lter can be an example to imaging techniques.…”

“…The Simav Graben, which is one of the West Anatolian grabens, has become subject to many investigations in order to demarcate the intra-graben structure and margins of the basin. Some of the previous studies used seismological data to explain the mechanism of the Simav Fault, which forms the graben boundary, and the causation of earthquakes (Bekler et al, 2011;Toker, 2014;Gündoğdu et al, 2016;Kartal and Kadiroğlu, 2014). In addition, the components of tectonic structures and their formation mechanisms were investigated by evaluating the focal distribution geometry of earthquakes in the graben.…”