Jeoloji Münendisliği Dergisi

Data concerning opMolitic emplacement of Eldîvan - Şabanözü (Çankırı) area

ABSTRACT: The area under investigation lies between Şabanözü and Eldivan towns of Çankırı where rock units ranging from Triassic to Quaternary crop out. The aim of this paper is present new data concerning the emplacement of the ophioEtic melange in this region,The metadetritic rocks of Kösrelik formaion (Lower Triassic) and the metavoleanics of the Yagizali formation show lateral gradaino and contain exotic blocks of Permian and Carboniaferous in age. These unite unsonformably overlain by the conglomerates and sandstones of Elmalı Formation (Anîsîan) which laterally passes in to Yeniçöte Formation of Ladmian-Oarnian age. The Yeniçöte formation is tectonically overlain by the Eldivan ophiolitic melanfe which contains gabbro, diabase, esrpantmiic, spilite, eherty limestone» radiolarite and mudstone. There are also limestone blocks of Liassic and Lower Cretaceous (Bemasian-VaJanginian-BaiTemian) age as well as the limestone blocks of unknow age in the ophiolitic melange. The Mart formation which is a typical flysch of Cenomanian- Turonian age unconformably overlies the ophiolitic melange starting with a conglomerate and passes vertically in to a limestone faciès of the same age (Kurşunludüz Fm,)* According to these d ata the Eldivan ophiolitic melange was emplaced to the region after Barremian and before Cenomanian-Turonîan time and possibly during the Austrian orogenic phase. The ophiolitic melanfe thrasted over the Miocene sediments during the foilowiftg tectonic events.