First data on the geochemistry of fluvial deposits of Çaybağı and Palu formations (Eastern Elazığ, Turkey)

In this study, the geochemistry (major, trace and rare earth elements) of fluvial deposits of the çaybağı and palu formations, eastern elazığ, have been investigated. the basement of the studied basin is composed of the guleman group, elazığ magmatics, hazar-maden group, and kırkgeçit formation which consist of volcanic materials derived from the elazığ magmatics. the çaybağı formation is composed of thick fluvio-lacustrine sedimentary sequence. palu formation consists of alluvial fan deposits and braided river, lacustrine sedimentary deposits. samples were collected from braided river deposits of çaybağı and palu formation along hacısamdere–çaybağı section (ç-samples) and hacısamdere-palu section (pl samples). significant positive correlation between zr/sc and th/sc ratios of two sample groups show that the siliciclastic sample groups do not represent considerable sediment recycling. çaybağı and palu samples have similar geochemical indices (al2o3/tio2, ti/zr, la/th, la/sc, cr/th, co/th, (la/yb)n, (gd/yb)n, lree/hree ratios) and indicate derivation from intermediate-basic source rocks. in si vs. na/k diagram samples plot in arc field and la/sc and ti/zr ratios show that samples were plotted in an oceanic island arc environment.