مرکز منطقه ای اطلاع رساني علوم و فناوري - Geologic and Mineralogic Investigations on Clays from Coal Deposits in Dinar (Afyon)-Baklan (Denizli) Region, Western Turkey

Abstract :

Study area is cover of Dinar (Afyon) and Çivril, Baklan settlements (Denizli) and its surroundings in Western Anatolia. The late Cenozoic extensional deformation caused to form several fluviolacustrine graben basins in the Western Anatolia attracting alluvial, fluvial and lacustrine depositions. The reverse V-shaped geometry of the Baklan and Dinar basins filled with Neogene continental deposits. Pre- Neogene rock succession around the Baklan–Dinar graben consists of conglomerates that overlie a metamorphic basement. The Neogene successions unconformably overlie conglomerates and they contain sandstone, claystone, marl, and limestone alternations deposited in a lacustrine environment. The Plio-Quaternary formations are represented by alluvial fan and fluvio-lacustrine sediments. They consist of clayey, silty sand, sandy clay with pebble and gravel lenses. These deposits contain lignites with an economic reserve.Deep core studies are in progress in the field. Thick clayey zones were cut during the drillings. The aim of this study is to investigate the clay mineralogy and determine the lateral and vertical distribution of the clays. The clay samples investigated in this study are closely related to the commercial lignite deposits since they occur underlying or overlying the major coal seams and also intercalated with them. Clay minerals are smectite, kaolinite, chlorite, illite–smectite mixed-layer varieties and illite. Major clay minerals are illite, smectite and kaolinite. In the Dinar Basin, contents of clay minerals are higher than Baklan Basin. The clay zone ranges from 30 to 300 meters and total thickness of the zone is ~150-200 meters. Major non-clay minerals are quartz, feldspar, calcite, dolomite, aragonite and phyrite.