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Geology, Geochemistry, and Isotope Ratio (𝛿65Cu - 𝛿34S ‰) of Manto-Type Gölcük (Koyulhisar-Sivas) Cu (±Ag) Mineralisation

Year 2025, Volume: 68 Issue: 3, 415 - 442, 31.08.2025

İsmail Erdem Kızılgöz Çiğdem Şahin Demir , Ali Uçurum , Nazmi Otlu , Ahmet Efe , Ryan Mathur

https://doi.org/10.25288/tjb.1689591

Abstract

Gölcük (Koyulhisar-Sivas) Cu (Ag) mineralisation is hosted by Eocene basalt and andesite and pyroclastics with volcanic-volcano-sedimentary rocks. Ore minerals are bornite, chalcopyrite, covellite, chalcocite, malachite, magnetite and hematite. Alteration in the host rocks includes sericitization, argillisation, carbonation, iddingsitization and epidotization. Gangue minerals are limited to quartz and calcite. According to the analysis results for the drill core samples, 2.97% Cu and 37 g/t Ag grade was determined at an average depth of 9.7 m from the surface. Sulphur isotope values (δ34S ‰) range from -20.0 to +2.8 in surface samples and from -6.3 to +0.6 in core samples. Copper isotope values (δ65Cu ‰) range from -0.86 to +1.38 in surface samples and -1.41 to +2.69 in core samples. For Gölcük Cu (Ag) mineralization, ore mineral paragenesis, alteration mineralogy, deposit type, and isotope geochemistry values suggest that it may be a Manto-type deposit.

Keywords

Gölcük Cu (±Ag) Manto-type Mineralization S-Cu Isotopes

Project Number

CÜBAP M-529

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Gölcük (Koyulhisar-Sivas) Manto-Tipi Cu (±Ag) Cevherleşmesinin Jeolojisi, Jeokimyası ve İzotop (𝛿65Cu - 𝛿34S ‰) Oranları / Geology, Geochemistry, and Isotope Ratio (𝛿65Cu - 𝛿34S ‰) of Manto-Type Gölcük (Koyulhisar-Sivas) Cu (±Ag) Mineralisation

Year 2025, Volume: 68 Issue: 3, 415 - 442, 31.08.2025

İsmail Erdem Kızılgöz Çiğdem Şahin Demir , Ali Uçurum , Nazmi Otlu , Ahmet Efe , Ryan Mathur

https://doi.org/10.25288/tjb.1689591

Abstract

Gölcük (Koyulhisar-Sivas) Cu (Ag) cevherleşmesi, Eosen yaşlı bazalt ve andezit ile bunların piroklastiklerini içeren volkanik-volkanosedimanter yan kayaçlıdır. Cevher mineralleri bornit, kalkopirit, kovellit, kalkosit, malakit, manyetit ve hematittir. Yan kayaçlarda alterasyonlar serizitleşme, killeşme, karbonatlaşma, iddingsitleşme ve epidotlaşmadır. Gang mineraller kuvars ve kalsit ile sınırlıdır. Sondaj karot örneklerinin analiz sonuçlarına göre, yüzeyden ortalama 9,7 m derinlikte %2,97 Cu ve 37 g/t Ag tenör olarak belirlenmiştir. Kükürt izotop değerleri (δ34S ‰) yüzey örneklerinde -20,0’dan +2,8’e, karot örneklerinde -6,3’den +0,6’ya değişim aralığındadır. Bakır izotop değerleri (δ65Cu ‰) yüzey örneklerinde -0,86’dan +1,38’e, karot örneklerinde -1,41’den +2,69’a değişim göstermektedir. Gölcük Cu (Ag) cevherleşmesi; cevher mineral parajenezi, alterasyon mineralojisi, yataklanma tipi ve izotop jeokimya değerlerine göre Manto-tipi olabileceği öngörülmektedir.

Keywords

Gölcük Cu (±Ag) Manto-tipi Cevherleşme S-Cu İzotopu

Project Number

CÜBAP M-529

Thanks

Steve WILLIAMS (President, CEO), Clinton SMYTH (VP Exploration) Simon POULSON (UNR-NV-USA), Greg B. AREHART (UNR-NV-USA)

References

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There are 90 citations in total.

Details

Primary Language Turkish
Subjects Isotope Geochemistry, Geochemistry (Other)
Journal Section Makaleler - Articles
Authors

İsmail Erdem Kızılgöz This is me 0000-0003-1699-1358

Çiğdem Şahin Demir 0000-0002-0630-4924

Ali Uçurum 0000-0002-9548-353X

Nazmi Otlu 0000-0002-8046-8484

Ahmet Efe 0000-0002-5989-4753

Ryan Mathur This is me 0000-0001-9095-8527

Project Number CÜBAP M-529
Early Pub Date August 17, 2025
Publication Date August 31, 2025
Submission Date May 2, 2025
Acceptance Date July 22, 2025
Published in Issue Year 2025 Volume: 68 Issue: 3

Cite

APA Kızılgöz, İ. E., Şahin Demir, Ç., Uçurum, A., … Otlu, N. (2025). Gölcük (Koyulhisar-Sivas) Manto-Tipi Cu (±Ag) Cevherleşmesinin Jeolojisi, Jeokimyası ve İzotop (𝛿65Cu - 𝛿34S ‰) Oranları / Geology, Geochemistry, and Isotope Ratio (𝛿65Cu - 𝛿34S ‰) of Manto-Type Gölcük (Koyulhisar-Sivas) Cu (±Ag) Mineralisation. Türkiye Jeoloji Bülteni, 68(3), 415-442. https://doi.org/10.25288/tjb.1689591
AMA Kızılgöz İE, Şahin Demir Ç, Uçurum A, Otlu N, Efe A, Mathur R. Gölcük (Koyulhisar-Sivas) Manto-Tipi Cu (±Ag) Cevherleşmesinin Jeolojisi, Jeokimyası ve İzotop (𝛿65Cu - 𝛿34S ‰) Oranları / Geology, Geochemistry, and Isotope Ratio (𝛿65Cu - 𝛿34S ‰) of Manto-Type Gölcük (Koyulhisar-Sivas) Cu (±Ag) Mineralisation. Geol. Bull. Turkey. August 2025;68(3):415-442. doi:10.25288/tjb.1689591
Chicago Kızılgöz, İsmail Erdem, Çiğdem Şahin Demir, Ali Uçurum, Nazmi Otlu, Ahmet Efe, and Ryan Mathur. “Gölcük (Koyulhisar-Sivas) Manto-Tipi Cu (±Ag) Cevherleşmesinin Jeolojisi, Jeokimyası Ve İzotop (𝛿65Cu - 𝛿34S ‰) Oranları Geology, Geochemistry, and Isotope Ratio (𝛿65Cu - 𝛿34S ‰) of Manto-Type Gölcük (Koyulhisar-Sivas) Cu (±Ag) Mineralisation”. Türkiye Jeoloji Bülteni 68, no. 3 (August 2025): 415-42. https://doi.org/10.25288/tjb.1689591.
EndNote Kızılgöz İE, Şahin Demir Ç, Uçurum A, Otlu N, Efe A, Mathur R (August 1, 2025) Gölcük (Koyulhisar-Sivas) Manto-Tipi Cu (±Ag) Cevherleşmesinin Jeolojisi, Jeokimyası ve İzotop (𝛿65Cu - 𝛿34S ‰) Oranları / Geology, Geochemistry, and Isotope Ratio (𝛿65Cu - 𝛿34S ‰) of Manto-Type Gölcük (Koyulhisar-Sivas) Cu (±Ag) Mineralisation. Türkiye Jeoloji Bülteni 68 3 415–442.
IEEE İ. E. Kızılgöz, Ç. Şahin Demir, A. Uçurum, N. Otlu, A. Efe, and R. Mathur, “Gölcük (Koyulhisar-Sivas) Manto-Tipi Cu (±Ag) Cevherleşmesinin Jeolojisi, Jeokimyası ve İzotop (𝛿65Cu - 𝛿34S ‰) Oranları / Geology, Geochemistry, and Isotope Ratio (𝛿65Cu - 𝛿34S ‰) of Manto-Type Gölcük (Koyulhisar-Sivas) Cu (±Ag) Mineralisation”, Geol. Bull. Turkey, vol. 68, no. 3, pp. 415–442, 2025, doi: 10.25288/tjb.1689591.
ISNAD Kızılgöz, İsmail Erdem et al. “Gölcük (Koyulhisar-Sivas) Manto-Tipi Cu (±Ag) Cevherleşmesinin Jeolojisi, Jeokimyası Ve İzotop (𝛿65Cu - 𝛿34S ‰) Oranları Geology, Geochemistry, and Isotope Ratio (𝛿65Cu - 𝛿34S ‰) of Manto-Type Gölcük (Koyulhisar-Sivas) Cu (±Ag) Mineralisation”. Türkiye Jeoloji Bülteni 68/3 (August2025), 415-442. https://doi.org/10.25288/tjb.1689591.
JAMA Kızılgöz İE, Şahin Demir Ç, Uçurum A, Otlu N, Efe A, Mathur R. Gölcük (Koyulhisar-Sivas) Manto-Tipi Cu (±Ag) Cevherleşmesinin Jeolojisi, Jeokimyası ve İzotop (𝛿65Cu - 𝛿34S ‰) Oranları / Geology, Geochemistry, and Isotope Ratio (𝛿65Cu - 𝛿34S ‰) of Manto-Type Gölcük (Koyulhisar-Sivas) Cu (±Ag) Mineralisation. Geol. Bull. Turkey. 2025;68:415–442.
MLA Kızılgöz, İsmail Erdem et al. “Gölcük (Koyulhisar-Sivas) Manto-Tipi Cu (±Ag) Cevherleşmesinin Jeolojisi, Jeokimyası Ve İzotop (𝛿65Cu - 𝛿34S ‰) Oranları Geology, Geochemistry, and Isotope Ratio (𝛿65Cu - 𝛿34S ‰) of Manto-Type Gölcük (Koyulhisar-Sivas) Cu (±Ag) Mineralisation”. Türkiye Jeoloji Bülteni, vol. 68, no. 3, 2025, pp. 415-42, doi:10.25288/tjb.1689591.
Vancouver Kızılgöz İE, Şahin Demir Ç, Uçurum A, Otlu N, Efe A, Mathur R. Gölcük (Koyulhisar-Sivas) Manto-Tipi Cu (±Ag) Cevherleşmesinin Jeolojisi, Jeokimyası ve İzotop (𝛿65Cu - 𝛿34S ‰) Oranları / Geology, Geochemistry, and Isotope Ratio (𝛿65Cu - 𝛿34S ‰) of Manto-Type Gölcük (Koyulhisar-Sivas) Cu (±Ag) Mineralisation. Geol. Bull. Turkey. 2025;68(3):415-42.
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