Makale

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Browsing Makale by Organisation Author "Çantay, Eren"

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    Fluid inclusion and Pb-O isotope constraints on the genesis of the Jurassic Karaburun VMS deposit (Central Pontides, Türkiye)
    (SAPIENZA, 2026-03-13) Çavdar, Buğra; Günay, Kurtuluş; Mutlu, Hali̇m; Çantay, Eren; Ekebaş-Çavdar, Eli̇f; Çi̇ftçi̇,Emi̇n; Abdelnasser, Amr
    The Jurassic Karaburun deposit of the Central Pontides represents one of the largest known volcanogenic massive sulphide (VMS) systems in Türkiye, comprising ~125 Mt of ore with average grade 1.16 wt% Cu, 0.25 wt% Zn, and 0.05 wt% Co. Mineralization is hosted by low-grade greenschist-facies rocks of the Çangaldağ Metamorphic Complex (CMC), where volcaniclastic and detrital successions interlayered with deep-marine sediments are intruded by mafic dikes and sills. Ore occurs mainly as stratiform, sheet-like to tabular bodies, expressed by disseminated, banded, pyritic clastic, semi-massive, and massive sulphide textures. To constrain ore-fluid evolution and metal provenance, we investigate primary fluid inclusions in ore-stage quartz and combined microthermometry with quartz δ18O and massive-sulphide Pb isotopes. Two-phase inclusions yield eutectic temperatures of −26 to −11 °C and lack clathrate formation, indicating a dominant H2O-NaCl system. Homogenization temperatures of 178-301 °C, corrected for ~160 bar hydrostatic pressure, imply trapping at 223±25 °C; ice-melting temperatures correspond to 1.4-11.1 wt% NaCl equiv. (mean 6.5 wt%). Moderately elevated salinity and the absence of boiling features support seawater-derived fluids modified by subseafloor circulation, with limited magmatic input. Quartz δ18O values (11.79 ‰ to 14.40 ‰ VSMOW) require isotopically evolved fluids, giving δ18O(fluid) of ~3-6‰ at FI-constrained temperatures. Pb isotope ratios (208Pb/204Pb=37.463-37.751; 207Pb/204Pb=15.424-15.503; 206Pb/204Pb=18.079-18.431) are weakly radiogenic and narrowly variable, consistent with a predominately mantle-derived Pb source. Collectively, these constraints indicate formation in a Jurassic ensimatic arcback- arc basin undergoing rifting, with chiefly seawater hydrothermal fluids modestly overprinted by magmatic volatiles.
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    Nuclear and Analytical Analysis Techniques That Primarily Used to Characterization of Ancient and Historical Materials
    (Springer, 2026-04-02) Kantoğlu, Ömer; Kalayci, Yakup; Aydin, Büşra; Çantay, Eren; Ergun, Ece; Bulduk Akkuş, Emel; Mert, Yüksel; Kirkayak, Özgü; Gökalp, Metin; Aksu, Erhan; Gündoğdu, Gençay
    Cultural artifacts, from ancient manuscripts to historic artworks, are vital symbols of national heritage and identity. The characterization of ancient artifacts is crucial for applying best practices in history and archaeology, including conservation, preservation, investigation, and the prevention of illegal trade. The illicit trafficking of these invaluable objects poses a significant threat to cultural preservation. The effective repatriation of stolen or illicitly exported cultural artifacts heavily relies on non-destructive methods, such as various nuclear and analytical techniques. These methods are critical not only for verifying the authenticity of the artifacts but also for establishing their provenance and legal ownership. This chapter explores the importance of analytical methods in the repatriation process applied in all over the world, highlighting their impact on the successful return of cultural treasures to their rightful owners.