The structural framework of southeast Turkey is essentially similar to that elsewhere in the Middle Eastern sedimentary basin, and the east-west-trending asymmetric anticlines of the folded belt south of the Anti-Taurus overthrust zone are continuations of the major oil-bearing structures of Iran and Iraq. However, the volume of source, reservoir, and cap rocks is much smaller as a result of extensive erosion in late Jurassic-early Cretaceous time, deposition of shelf carbonates rather than deep basinal sediments in the lower and middle Cretaceous, and late Tertiary-Quaternary erosional removal of evaporites which exposed Mesozoic and early Tertiary reservoirs to flushing by fresh water. Known oil accumulations are associated with upper Cretaceous limestones enclosed in or interfingering with impermeable shale sequences.

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