Integrated geochronological, isotopic (Sr, Nd and Pb) and mineral chemistry investigations of Oligocene intrusive rocks and their link to magmatic-hydrothermal ore systems, Yenice (Biga Peninsula), Türkiye
Integrated geochronological, isotopic (Sr, Nd and Pb) and mineral chemistry investigations of Oligocene intrusive rocks and their link to magmatic-hydrothermal ore systems, Yenice (Biga Peninsula), Türkiye
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 (H 2O melt = 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.
Biga peninsula, Magmatic-hydrothermal systems, Mineral chemistry, Re-Os molybdenite dating, Sr-Nd-Pb isotopic geochemistry, U-Pb geochronology
Çiçek, Mustafa
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Oyman, Tolga
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Palmer, Martin R.
d2e60e81-5d6e-4ddb-a243-602537286080
Catlos, Elizabeth J.
d99a670e-fdc6-4753-9564-ddd3cf223601
Selby, David
f97b6a1c-f11d-4819-bcdf-7d4a27bbd0ab
Ersoy, Yalçın
2c4e6074-ea3b-4404-9faa-5e53611bff06
Kaliwoda, Melanie
c75f5bd3-f2ac-47e3-a4e1-f7156d92c21d
June 2026
Çiçek, Mustafa
54774a05-a3b5-4f08-ad5d-91b192ce6390
Oyman, Tolga
b28b845a-c6e7-49b2-a9b0-804535b465aa
Palmer, Martin R.
d2e60e81-5d6e-4ddb-a243-602537286080
Catlos, Elizabeth J.
d99a670e-fdc6-4753-9564-ddd3cf223601
Selby, David
f97b6a1c-f11d-4819-bcdf-7d4a27bbd0ab
Ersoy, Yalçın
2c4e6074-ea3b-4404-9faa-5e53611bff06
Kaliwoda, Melanie
c75f5bd3-f2ac-47e3-a4e1-f7156d92c21d
Çiçek, Mustafa, Oyman, Tolga, Palmer, Martin R., Catlos, Elizabeth J., Selby, David, Ersoy, Yalçın and Kaliwoda, Melanie
(2026)
Integrated geochronological, isotopic (Sr, Nd and Pb) and mineral chemistry investigations of Oligocene intrusive rocks and their link to magmatic-hydrothermal ore systems, Yenice (Biga Peninsula), Türkiye.
Chemie der Erde - Geochemistry, 86 (2), [126409].
(doi:10.1016/j.chemer.2026.126409).
Abstract
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 (H 2O melt = 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.
Text
Cicek et al 2026
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Restricted to Repository staff only until 18 March 2027.
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Accepted/In Press date: 10 March 2026
e-pub ahead of print date: 18 March 2026
Published date: June 2026
Keywords:
Biga peninsula, Magmatic-hydrothermal systems, Mineral chemistry, Re-Os molybdenite dating, Sr-Nd-Pb isotopic geochemistry, U-Pb geochronology
Identifiers
Local EPrints ID: 512248
URI: https://eprints.soton.ac.uk/id/eprint/512248
ISSN: 0009-2819
PURE UUID: 8c6f0af5-20f1-4d61-bba5-ecb00bc6f0a6
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Date deposited: 22 Jun 2026 16:51
Last modified: 13 Sep 2026 15:49
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Contributors
Author:
Mustafa Çiçek
Author:
Tolga Oyman
Author:
Elizabeth J. Catlos
Author:
David Selby
Author:
Yalçın Ersoy
Author:
Melanie Kaliwoda
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