Sratigraphy of the Danismen Formation and distribution of lignite seam layers interbedding in the Unit, Thrace Basin, Turkey

Aim of this study to understand lignite potential of the basin. This work has been conducted using subsurface data; including numerous wells and several seismic lines provided by TPAO, MTA and TKI. Purpose of this work to understand economical values of lignite seam layers interbedding in the Danismen Formation (Oligocene-Early Miocene). For that purpose, first total thickness map of Ergene-Kircasalih formations (Late Miocene-Pliocene) prepared. Total thickness of the lignite layers mapped, which is main purpose of the work. Lignite seam layers are usually located in middle of the Danismen Formation. Also several stratigraphic correlations conducted to understand lateral continuation of lignite layers. First obstacle to reach lignite is thickness of the Ergene-Kircasalih formations which are overlying lignite bearing Danismen Formation. Main structural event which is controlling thickness variation of the Danismen Formation is Thrace Fault System; it was active during Middle Miocene. Danismen Formation extensively or partially eroded along the fault zone and on the en-echelon folds of fault system. Amount of erosion is variable, Danismen Formation and embedded lignite seams were completely eroded in some areas. Elevated areas related Thrace Fault System partially eroded, however these areas were still paleohigh during accumulation of Ergene-Kircasalih formations. Onlapping sequence of Ergene-Kircasalih formations are thinner on these paleohigh. At the end of this project lateral thickness variation and discontinuities of the lignite interbeds have been delineated by well log correlations. Addition to that, thin overburden areas of lignite bearing Danismen Formation are located by mapping thickness of overlying Ergene-Kircasalih formations.