Shear-hosted Gold Mineralization in Central Anatolian Metamorphic Massifs

Date

2022-9-13

Author

Onat, Kaan
Kaymakcı, Nuretdin
Kuşcu, İlkay
Yalçıntaş, Hakan
Kaskatı, Mustafa Tuna

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Niğde Massif (South-central Turkey) is a metamorphic core complex composed of amigmatite-paragneiss basement, overlain by schist-marble-amphibolite alternation and a thickmarble sequence. The massif experienced peak pressure-temperature conditions of >725 ℃and ∼16-20 km at the age of ∼ 91 Ma, which led to the partial melting of continental crustand generation of a subsequent intrusion of the crustal-derived Üçkapılı Granite and dike/sillarrays into the massif.The field studies led to three distinct mineralization sites: (i) along the low-angle faultsat schist-marble contacts, (ii) within the high-angle cataclastic shear zones in schist layers, and(iii) in between the foliation planes of schists.A common association of intrusive bodies with mineralized shear zones implies thatintrusion might have played a role in transporting or remobilizing the ore via a hydrothermalfluid. Discrete shear zones and associated foliation planes are used as fluid pathways and hosts.Structural relationships between brittle and ductile structures and the Au-Hg-As-Sb-Pbparagenesis indicate that these deposits can be classified as orogenic gold deposits. However,considering that these deposits are accumulated during the exhumation of the metamorphicunits, the absence of meso/macro scale mineralized quartz veins/veinlets contradicts theclassical models proposed for the development of the Precambrian orogenic gold deposits.

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https://secureservercdn.net/160.153.138.203/f7y.24c.myftpupload.com/wp-content/uploads/2022/09/SMRS2022_AbstractBook_F.pdf
https://hdl.handle.net/11511/100296

Conference Name

Sustainable Mineral Resources Supply: Challenges for Future Generations

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Department of Geological Engineering, Conference / Seminar

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Citation Formats

K. Onat, N. Kaymakcı, İ. Kuşcu, H. Yalçıntaş, and M. T. Kaskatı, “Shear-hosted Gold Mineralization in Central Anatolian Metamorphic Massifs,” presented at the Sustainable Mineral Resources Supply: Challenges for Future Generations, Geneve, İsviçre, 2022, Accessed: 00, 2022. [Online]. Available: https://secureservercdn.net/160.153.138.203/f7y.24c.myftpupload.com/wp-content/uploads/2022/09/SMRS2022_AbstractBook_F.pdf.