ASTER spectral band ratios for lithological mapping: a case study for measuring geological offset along the Erkenek Segm
- PDF / 18,410,031 Bytes
- 8 Pages / 595.276 x 790.866 pts Page_size
- 79 Downloads / 195 Views
ORIGINAL PAPER
ASTER spectral band ratios for lithological mapping: a case study for measuring geological offset along the Erkenek Segment of the East Anatolian Fault Zone, Turkey Abdelrahman Khalifa 1,3 & Ziyadin Çakır 1 & Şinasi Kaya 2 & Safwat Gabr 4 Received: 9 June 2019 / Accepted: 12 August 2020 # Saudi Society for Geosciences 2020
Abstract The current work examines the lithological variation along the Erkenek Segment of the East Anatolian Fault (EAF), a major tectonic structure which accommodates the westward extrusion of Anatolia together with the North Anatolian Fault. Mapping the geology at high spatial resolution along this segment with conventional mapping techniques is highly challenging due to the complex tectonic setting and the abundant number of different lithological units of varying spatial extent. Therefore, in the current study, the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data along the Erkenek Segment have been used different spectral rationing techniques are applied with band the ratios of 1/3–1/9–3/9, 7/3–1/7–3/5 and 9/5–5/3–3/1 being remarkably useful for detailed lithological mapping and hence detecting the geological offsets along this section of the fault. Thus, these ASTER band ratio images can be used for the lithological mapping along the whole EAF and on other regions in the world with similar lithological and geomorphological conditions. Keywords Band ratios . Geological offsets . ASTER . Remote sensing . East Anatolian Fault
Introduction The sinistral East Anatolian Fault (EAF) extends for about 400 km between Karlıova triple junction in the northeast and Maraş triple junction in the southwest, characterizing the boundary between the Anatolian and Arabian plates in eastern Turkey (Mckenzie 1970; Şengör et al. 1985; Dewey et al. 1986) (Fig. 1). The age of the EAF is suggested to be the latest Miocene to earliest Pliocene (Hempton 1985; Şengör et al. 1985). Depending on the detailed geological mapping along Responsible Editor: Biswajeet Pradhan * Abdelrahman Khalifa [email protected] 1
Department of Geological Engineering, Faculty of Mines, Istanbul Technical University, Istanbul, Turkey
2
Department of Geomatic, Faculty of Engineering, Istanbul Technical University, Istanbul, Turkey
3
Department of Geology, Faculty of Science, Al-Azhar University, Cairo, Egypt
4
National Authority for Remote Sensing and Space Sciences, Cairo, Egypt
the EAF, the offsets on the pre-Miocene rocks are measured between 14 and 26 km (Herece 2008; Hubert-Ferrari et al. 2009; Duman and Emre 2013). In terms of recent activity of this fault zone, the GPS-based geodetic models and palaeoseismological studies yield a slip rate of about 10 mm/ year (Meghraoui et al. 2006; Reilinger et al. 2006; Aktuğ et al. 2016). Additionally, the morphotectonic analysis of the EAF zone confirms that the fault zone possesses different degrees (medium to high) of tectonic activities (Khalifa 2018; Khalifa et al. 2019). The EAF is divided by Duman and Emre (2013) and Khalifa et al. (2
Data Loading...
