Origin and distribution of sulphur in the Neogene Beypazari Lignite Basin, Central Anatolia, Turkey

Spatial and temporal variability in vegetation and coal facies as reflected by organic petrological and geochemical data in the Middle Miocene Çayirhan coal field (Turkey)

“…1). The basin is filled with mainly lacustrine and volcano-sedimentary rocks and the sequence contains economic resources of coal, clay and trona (Yağmurlu et al, 1988;İnci, 1991;Whateley and Tuncali, 1995a). The coal-bearing strata are located in the NW-SE trending area centred at Çayirhan (Fig.…”

“…Based on proximate and elemental analyses, temporal and lateral variations in coal International Journal of Coal Geology 134-135 (2014) 46-60 quality have been outlined. Mean random reflectance data (0.36% Rr) of huminite for the upper seam classify the coals as lignite in rank (Whateley and Tuncali, 1995a;Querol et al, 1996). Organic geochemical data of coal samples, obtained during previous studies, are limited to a few samples (Özçelik and Altunsoy, 2005).…”

Stable isotope-based reconstruction of Oligo-Miocene paleoenvironment and paleohydrology of Central Anatolian lake basins (Turkey)

“…Numerous studies were carried out to reconstruct Middle Cenozoic paleoenvironments in the Eastern Mediterranean to better understand the vegetation and climate history of the region. However, most of these studies are based on micro-and macrofloral records, either addressing spatially extensive coverage (e.g., Ivanov et al 2002;Kovar-Eder et al 2006;Akgün et al 2007;Bruch et al 2007;Fauquette et al 2007;Ivanov et al 2007aIvanov et al , 2007bStrömberg et al 2007;Ivanov et al 2008;Yavuz-Işık & Toprak 2010;Bruch et al 2011;Utescher et al 2011) or focusing on more local records (e.g., Akgün 1993;Whateley & Tuncali 1995;Akgün & Sözbilir 1999;Karayiğit et al 1999;Akgün et al 2002;Akkiraz & Akgün 2005;Kayseri et al 2006). Other approaches use mammal fossils as climatic proxies (e.g., Böhme 2003;Fortelius et al 2006;Eronen et al 2009) or are based on sedimentologic analysis, such as tracing the presence of lignite as an indicator of a warm and wet climate (e.g., Yağmurlu et al 1988;İnci 1990 O values indicates changes in regional climate including more arid conditions and an increasing dominance of closed saline lake conditions in the central plateau region.…”

Chemical characteristics, mineralogical composition and rank of high sulphur coking coals of Middle Miocene age in the Gökler coal field, Gediz, Turkey

“…The average value (0.72%Rr) is compared with the some other coals in Turkey studied by Dogru (1978), Karayigit (1983), Yagmurlu & Karayigit (1984), Demirel (1989), Karayigit & Cicioglu (1994), Karayigit & Eris (1994), Whateley & Tuncali (1995). The distribution and average random reflectance values of huminite/ vitrinite of the compared coals in Turkey are presented in Fig.…”