Ercan Karakullukçu Abstracts

Murgul Ore Deposites and Geology

Ercan Ünal Karakullukçu

Eti Bakir Company, Murgul Operation Mining Research and Exploration Unit



Murgul region basic rocks composed of exposed Paleozoic aged metamorphic rocks along the Artvin-Choruh valley, affected by Alpine orogenesis located in north east of the eastern pontide tectonic belt, are represented by volcanic rocks indicating the island arc formed during the period from Liassic to Pliocene. Upper Cretaceous is the most intense period of this volcanism, especially in this period it has developed as submarine volcanism. Sedimentation took place during the volcanic breaks and volcanic rocks were also accompanied by sedimentary rocks.

Mineralization is being observed along the boundary of the upper level of old dacitic tuff with the age of upper Cretaceous with cover rocks in massive type, and network and scattered type in the dacitic tuffs. Akarsen mattress from Murgul mine beds is massive type, Damar-Bognari, Cakmakkaya, Carkbaşı, Kizilkaya and Isirliktepe are network and scattered types. Structurally, the mineralization is controlled by dom-anticline, synclinal-bowl structures. Mineralization develops as network and scattered in dom-anticline, and in the syncline-cups it develops as massive type.

Ore minerals are mainly pyrite and chalcopyrite, and lesser values of  Brittite, marcasite, idait, prostit, pearseit, neodijenite, hematite, wurtzite, simitsonite, calcite, chalcopyrite, Pyrarjirit, aeikinite, tetradimide, klaustalite, tellurobismuthine, hessite, vittisenite. Gangue minerals are mainly quartz, siderite-ankerite calcite, chlorite, barite and gypsum.