Factors Controlling Low Uranium and Thorium Concentrations in the Çayirhan Bituminous Shales (ÇBS) in the Beypazari (Ankara) Area, Turkey

In this study uranium and thorium contents and depositional characteristics of Çayirhan bituminous shales (ÇBS), west of Ankara (central Anatolia), are investigated. Samples used were collected from boreholes opened by Park Holding Ltd. A total of 25 samples were taken from bituminous shale levels in boreholes drilled at 6 different locations in the study area. The Hirka formation which hosts bituminous shale deposits is a volcano sedimentary...