Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Jeoloji Mühendisliği Bölümü, Türkiye
Tezin Onay Tarihi: 2024
Tezin Dili: İngilizce
Öğrenci: FURKAN OĞUZ
Danışman: Erdin Bozkurt
Özet:
The collision of the Anatolide-Tauride Block with the Pontides along the Izmir-Ankara suture zone resulted in intense obduction of ophiolites during the closure of the northern branch of Neo-Tethys between the Late Palaeocene and Early Eocene. Various magmatic episodes occurred in the Tavşan deposit area, leading to hydrothermal mineralization relationships. This region contains several mineral deposits with varying metal endowments closely linked to the lithology and tectonism. An integrated field study combining other mineral exploration disciplines was conducted to better understand the formation of these deposits, particularly in the Tavşan deposit where Au, Sb-Au, and Sb mineralization have been identified. Field observations and microscopic analyses were utilized to determine relationships between lithological units, structures, and alteration zones at Tavşan. The presence of macrostructures (particularly faults and folds) and combined stress analyses indicate significant structural controls on the dispersion of hydrothermal fluids, marked by the presence of silicification, vein development and hydrothermal breccias. Microscopic studies can distinguish the relationship between alteration zones and the auriferous jasperoid, and their precursors associated with ultramafic rocks and limestone units. Electron-Probe-Micro-Analyser studies shows that gold is localised with disseminated pyrite minerals within jasperoid after hydrothermal silicification and de-carbonatisation of the host rocks. The Tavşan deposit is observed to be controlled by thrust faults, which were later reactivated as normal faults during a subsequent extension regime following the highest compression in the Eocene. Spatial zoning in metallic associations and variations in the sources of ore-forming fluids suggest that Sb-Au accumulation originated from a collision and post-collisional hydrothermal system. The genetic links among these deposits suggest potential buried intrusions and ore-controlling fault systems, indicating a Miocene-aged metallogenic epoch. The results of this study emphasize that the direct or indirect integration of diverse exploration methods can enhance the understanding of relationships between tectonic processes and mineralization, applicable to any ore deposit.