Adapazari-Bolu (Bati Karadeniz) yöresi Geç Paleosen-Eosen sedimanter istifinin kil mineralojisi

Late Paleocene-Eocene sedimentary rocks crop out in a large area at Adapazari-Bolu (Western Black Sea) region located in the North Anatolian Fault Zone. The lithology of these rocks, named as Kusuri Formation, consists of conglomerate, sandstone, claystone, tuff and tufaceous breccia. In this study, stratigraphic sections were measured at different locations in Kusuri formation and the samples were taken through these sections and XRD (whole rock and clay fraction), chemical analyses, SEM and EDS studies were carried out on the samples. In the whole rock samples; quartz, clay minerals, feldspars, mica minerals and calcite were determined as common minerals. Opal-CT, dolomite and analcime were also be found in some samples. In clay fraction, smectite and illite are abundant, kaolinite and chlorite are less abundant; 14_c-14_v, 14_s-14_c, 10_i-14_s, vermiculite, pyrophyllite, hallo-site were also determined in trace amount. The chemical analyses indicate that smectites were beidellite, Fe-be- idellite or saponite. The smectite minerals were formed by the alteration of volcanic and detrital materials. Among other clay minerals, illite and chlorites have detrital origin, while interstratified clay minerals are the products of alteration.