| Popis: |
The Neogene Kazman-Tuzluca Basin is located in the NE Anatolia and extends eastward into Armenia Oktemberian Basin. The Halklak (Late Oligocene), Turabi and Tuzluca formations (Lower-Middle Miocene) are time equivalents of the organic-rich Oligo-Miocene Maikop Series in the Caspian region. However, depositional conditions within the KBT are appreciably different and source rocks are not as richer as it. The Halklak Formation has little source rock potentials, with very low values of TOC (0.04-0.25%), HI (14-90mg HC/TOC) and genetic potential-GP (i.e. Rock-Eval S-1+S-2=0.05 to 0.22mg HC/g rock). Although a peat facies sample has a relatively high TOC (6.78%), T-max of 428 degrees C, HI values are very low (45mg HC/TOC). TOC and GP values for the Tuzluca Formation are between 0.06 and 0.39wt%, and 0.16-1.51mg HC/g rock, respectively. Some levels of the Turabi Formation have TOC contents up to 6.14wt%; however, mainly T-max values are low 435 degrees C, and HI range from 25 to 54mg HC/TOC. The extract of one low-maturity Turabi sample possesses biomarker distributions of an immature rock. Low relative abundance of tricyclic terpane and dominant C29 (20R) are in accordance with the immature source rock. Some samples collected from the outcrops nearby Pliocene/Pleistocene lava series show localized maturation stage. We suggest that the Oligocene to Middle Miocene units could be more studied beneath the volcanic plateau. |
