PRE - NEOGENE TECTONOSTRATIGRAPHY OF DİLEK PENINSULA AND THE AREA SURROUNDING SÖKE AND SELÇUK

Abstract

At Dilek Peninsula-Söke-Selçuk areas, to the western-southwestern parts of Menderes Massive, structurally related various techtono-stratigraphical units crops out. The sequence commences with the "Dipburun nappe" in the Dilek Peninsula which is probably Jurrasic to Late Cretaceous in age and composed of marble, cherty marble and metavolcanites, turbiditic marbles and phyllites depicting a flysch facies. It is overlain by the "Efes nappe" which comprises various schists and marbles of Late Paleozoic-Early Triassic age and metabauxite bearing metacarbonates of Triassic-Late Creataceous age. Around Söke-Selçuk area, The Efes nappe is tectonically overlain by the "Þirince metaflysch" comprising olistoliths or tectonic slabs of metabasic rocks, metaultrabasic rocks, eclogites, marbles, amphibolites and cherty marbles in a matrix made up of pelitic and basic schists. The Þirince metaflysch is a probable lateral equivalent of the metaflysch forming the upper levels of the Dipburun nappe. Upward, "Akçakonak unit" tectonically overlies the Þirince metaflysch. The Akçakonak unit is the equivalent of Bodrum Nappe which is a part of Lycien Nappes. It consists of metadetritics of Early-Middle Triassic age, in its lower levels and carbonates of Middle Triassic-Cenonian age in its upper levels. It is overlain by the "Izmir flysch" which is olistostromal in parts. The Izmir flysch is presented over the Efes nappe and also over and under the Akçakonak unit as tectonic slabs. All of these units are overlain unconformably by the Early MioceneQuarternary aged formations.