Geological, mineralogical-petrographical and fluid inclusion characteristics of the Çatalçam (Soma-Manisa) Au-Pb-Zn-Cu mineralization

Year 2022, , 25 - 49, 20.04.2022

Ramazan Sarı Şahset Küçükefe Gülcan Bozkaya Ömer Bozkaya Fatih Bademler Zehra Deveci Aral Elif Dilek Bayrakçıoğlu Cahit Dönmez , Serkan Özkümüş

https://doi.org/10.19111/bulletinofmre.930094

Cited By: 1

Abstract

The study area is located in the southeastern Biga Peninsula. As result of field, drilling and laboratorystudies, diorite porphyry intruded to Lower Miocene and older units and contained Au, Pb, Zn and Cu anomalies, has been determined. Intersected potassic, propylitic, phyllic and argillic alteration zones were developed in the pluton and host rock. Veins-veinlets developed in the pluton and host rock, contain native gold, silver, pyrite, chalcopyrite, sphalerite and galena. They are composed of undulated quartz in the deeper levels, and massive quartz, calcite/dolomite and barite in the middle and upper levels. According to the fluid inclusion data from sphalerite, quartz and barite, temperature of ore-bearing fluids are in three groups (argillic:150-220°C, phyllic:250-350°C, potassic:>400°C). Fluid inclusions, including solid phases such as hematite, chalcopyrite and salt as well as liquid and gas phases, indicate that Çatalçam Au-Cu mineralization is intrusion-related system. Fluid inclusion data display temperature and salinity of the ore-bearing fluids in the early stage (porphyry) are high, whereas relatively lower in the late stage (epithermal). In conclusion, Çatalçam mineralization was developed in two different phases as porphyry Au-Cu and epithermal Zn-Pb-Cu-Au, which is the first porphyry gold deposit related to Miocene magmatic-hydrothermal system in the Biga porphyry belt.

Keywords

Northwestern Anatolia, Lower Miocene Magmatism, Porphyry- Epithermal Au-Cu Mineralization, Fluid Inclusion.

Supporting Institution

This study is based on the data obtained from the exploration project ‘Polymetallic Mineral Explorations in the Biga Peninsula and the South’ conducted by the General Directorate of Mineral Research and Exploration Department (MTA).

Thanks

We would like to thank the Mineral Research and Exploration Department and MTA Northwest Anatolia Regional Directorate for their contribution during the project. We are most grateful to Geology Engineer Esra OKUR and Geology Engineer Beyit YILMAZ who work for Department of Mineral Analysis and Technology and carried out the mineralogicalpetrographic analysis. We would like to thank the staff of the MTA department of Feasibility Studies. We also would like to thank Prof. Dr. Ahmet GÖKÇE (Cumhuriyet University), Prof. Dr. Emin ÇİFTÇİ (Istanbul Technical University), and the anonymous reviewer for their constructive revisions and comments on the manuscript.

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