Akademik Veri Yönetim Sistemi
Geochemistry, cilt.86, sa.2, 2026 (SCI-Expanded, Scopus)
The Yenice region in the eastern Biga Peninsula (NW Türkiye) hosts Late Oligocene intrusions that are genetically linked to magmatic-hydrothermal ore-forming systems. This study integrates new in-situ U-Pb zircon geochronology, Re-Os molybdenite dating, Sr-Nd-Pb isotopic geochemistry, and mineral chemistry data to investigate the temporal and genetic relationships between magmatism and mineralization. The weighted mean 238U-206Pb zircon crystallization age of the Çakıroba, Nevruz, Sofular, and Soğucak intrusions in the Yenice region is 25.5 ± 0.65 Ma (±1σ, n = 29 grains). This age overlaps within uncertainty with Re-Os molybdenite dates range from 25.39 ± 0.10 Ma to 25.76 ± 0.11 Ma, supporting coeval intrusion emplacement and ore deposition. The granitoids display high-K calc-alkaline, metaluminous, and I-type characteristics, and Sr-Nd-Pb isotopic compositions consistent with derivation from an enriched subcontinental lithospheric mantle source with limited crustal assimilation. Biotite and amphibole compositions reveal high oxygen fugacity (ΔNNO = −0.09 to 2.68) and elevated contents (H2Omelt = 3.46–5.72 wt%), key parameters for porphyry-related mineralization. The halogen fugacity of biotite (IV(F/Cl) = 5.99–6.28) further supports a magmatic-hydrothermal fluid system conducive to ore formation. These findings highlight the potential of the region for porphyry, skarn and epithermal mineralization and provide a framework for future exploration targeting hydrothermal systems associated with Oligocene intrusions in northwest Anatolia.