Türkiye Jeoloji Bülteni

Geologic and Petrographic Investigation of Mıhlıdere Valley (Kazdağ, Northwestern Turkey)

Abstract: Palingenetic granites constitute the basement rocks of Mihhdere valley located to thewest of Kazdağ Massif, Turkey. The rock sequence consists, from base upwards, of foliated granite, migmatite, gneiss and marbles which are unconformably overlain by various schists and marbles. Different lithofacies of this sequence are overlain by a tectonic slice of melange and flysch. All these rocksare intruded by the Altınoluk Granite of Paleocene age generally forming skarn zones. Sedimentaryand volcanic rocks of Miocene age unconformably cover the older units.Paleozoic or pre-Paleozoic events probably played an important role on the structural evolutionof the massif. Upper Triassic was a period of overt hrusting and strike-slip faulting with associatednormal faults.Mineral parageneses point to a regional meta morphism of Barrowian type. Reported Abukumatype metamorphism is attributed to contact metamorphism. The metamorphic rocks display effects of aregional metamorphism of low, middle and high grades.