Abstract

The study area located 35 km south of the Çanakkale city center and 8 km southwest of Ezine County (Çanakkale-Turkey) and covers about 80 km². The main settlements in the study area are AladaÄŸ, Kemalli, Üsküfçü, Koçali and Gokcebayir villages. Pre(?) Cambrian to Holocene aged magmatic, metamorphic and sedimentary rocks crop out in the study area. The basement of the study area is formed by Lower Cambrian- Pre(?)-Lower Cambrian aged Geyikli formation, comprising primitive alternating sequenced low-grade metamorphic rocks, such as sandstone-claystone-limestone. Geyikli formation is overlaid by the middle-late Permian Bozalan formation, which consists of recrystallized limestones. Cretaceous aged Denizgoren Ophiolites thrusted over the older units. Upper Oligocene-lower Miocene Hallaclar volcanics composed of altered andesite and rhyolite. On the other hand, Kestanbol Pluton, same age with Hallaclar volcanics and represented by mainly quartz-monzonite, monzonite, monzodiorite porphyry, syenite porphyry and quartz-syenite porphyry. Lower- middle Miocene aged Ezine volcanics composed of pyroxene-andesite and trachyte. Plio-quaternary Bayramiç Formation overlaid these units with disconformity and also consists of slightly cemented conglomerate, sandstone and mudstone. In the study area, Hallaclar volcanics and Denizgoren Ophiolites were affected by alteration with the intrusion of Kestanbol Pluton. Skarn type mineralization was developed close to Kestanbol Pluton contacts with the carbonaceous rocks of the Bozalan formation and Denizgoren Ophiolites which is located north of Aladag. Highly dense clay alteration is observed near the contacts of Hallaclar volcanics with the Kestanbol Pluton. Therefore Ca-silicates and some metallic enrichment such as iron, copper, zinc and lead were developed in the skarn zone. Malachite fillings are observed in the fractures of the pluton. Mainly garnet (grossular), tremolite/actinolite, epidote and zoisite/clinozoisite paragenesis were observed while minor amounts of talc, wollastonite, augite, diopside were determined in the thin section samples, taken from skarn mineralization, which is located north of Aladag. In addition, the main ore minerals are represented by magnetite, hematite, chalcopyrite, sphalerite, galenite, cerussite, covellite, digenite, malachite and pyrite in the polished section samples, taken from the same location with thin section samples.

Key words: Skarn-type mineralization, geology, ore deposits, Aladag, Ezine.