Türkiye Jeoloji Bülteni

Geochemical Properties of the Şeyhler Borate Deposits (Emet, Turkey)

Abstract: Borate deposits of western Anatolia were formed in the intra-continental playa lake sediments duringMiocene when the volcanic activity occurred from Paleogene to Quaternary. All mineralizations are associatedwith these volcanic activities. The main element Ca in Emet Şeyhler deposits shows enrichment compared to theaverages of Earth crust and andesite. The trace elements of Se, Sr, As, Sb, Mo and Li in borate deposits enrichmentsare determined. It can be concluded that based on the concentration of Se and Li elements could be recovered as byproduct, besides B. Elements in deposits are clustered in two groups. A large group consists of elements such as Si,Mg, Al, Fe, K and a second group composes of B, Ca and Na. According to Ce and Eu anomalies observed in the REEdistribution diagrams show these deposits should have formed under highly oxidative conditions with significanthydrothermal contribution.