Çataltepe (Lapseki-Çanakkale) pb-Zn±Cu±Ag yatağı’nın jeolojisi ve alterasyon Özellikleri

Abstract

The Çataltepe Pb-Zn±Cu±Ag deposit, to the east of Lapseki (Çanakkale), in the northwestern part of Biga Peninsula, is hosted by marbles, and at the contact between marbles and other rocks of the Çamlıca metamorphics (Cretaceous). In the area, still under operation, the strike and dip of the mineralization are N40W/40o NE which is nearly parallel to schistosity of marbles and other metamorphic rocks. The microscopic investigations indicate that garnet and pyroxene minerals have been formed during prograde stages which were carbonatized and epidotized during the retrograde stage. The ore minerals are brown and honeyblende sphalerite, galena, chalcopyrite, pyrite, pyrrhotite, valleriite, magnetite, hematite, marcasite, arsenopyrite and limonite. The textural characteristics are suggestive of two subsequent mineralization at the retrograde; massive and disseminated ore, and the former is always cut by the latter. The ore mineral assemblage is accompanied by carbonate, chlorite and quartz. The late-stage alterations which are represented by manganese oxide-hydroxide, limonite, calcite and quartz, mask the prograde and retrograde stage alterations. Our data indicate that the Çataltepe Pb-Zn±Cu±Ag deposit was formed by ore-bearing solutions circulating particularly within marbles and along the marble-metasandstone/quartzite contacts. The data also favors an epigenetic origin for formation of the deposit under meso-epithermal conditions in areas relatively shallower than distal Pb-Zn skarn deposits. © 2014, Hacettepe Universitesi Yerbilmleri. All rights reserved.