KUCUKDA : A NEW, HIGH SULFIDATION EPITHERMAL Au-Ag-Cu DEPOSIT AT THE TV TOWER PROPERTY IN WESTERN TURKEY

Smith, Moira; Lepore, William A.; Incekaraoğlu, Tolga; Shabestari, Peter; Boran, Hakan; Raabe, Ken

doi:10.2113/econgeo.109.6.1501

Cited by 13 publications

(5 citation statements)

References 8 publications

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“…In the Biga Peninsula (Okay et al 1990;Yilmaz et al 1990;Ercan et al 1995;Sanchez et al 2013;Bertrand et al 2014) this has resulted in numerous, predominantly, epithermal deposits, of low, intermediate and high sulphidation styles and porphyry deposits, making this region, perhaps, the most important for exploitation and exploration in the near east/Europe (Yigit, 2012). The deposits are relatively closely spaced, of variable size and may have gold as the sole resource, while others are base-metal resources with lesser or sub-economic amounts of gold (Bozkaya, 2001;Yilmaz, 2002;Oyman et al 2003;Orgun et al 2005;Bozkaya and Gokce, 2009;Yilmaz et al 2010;Ozen and Arik, 2013;2015;Imer et al 2013;Bozkaya et al 2014;Smith et al 2014;Kumral et al 2016).…”

Section: Geological Settingmentioning

confidence: 99%

Direct observation and measurement of Au and Ag in epithermal mineralizing fluids

Banks

Bozkaya

2019

Ore Geology Reviews

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Colloidal gold particles have been observed in c. 300 O C low salinity fluids from the Arapucandere intermediate sulphidation epithermal base-metal-Au deposit in NW Turkey. This is the first time colloidal gold has been recorded in an ancient mineralizing fluid. Growth, in veins, of large euhedral quartz crystals, after the deposition of sulphides, occurred in a number of stages from the introduction of fresh pulses of fluid. The quartz overgrowths have a fibrous texture which facilitated trapping of large elongate fluid inclusions between the quartz fibres which grew perpendicular to the crystal faces of the pre-existing quartz. Episodic periods of intense trapping of fluid inclusions occurred throughout the growth of quartz. Trapped within primary fluid inclusions are numerous particles of gold, the largest observed is c. 1 μm but most are smaller. BSE element mapping shows these to contain Au, Ag, Cu + Hg. LA-ICP-MS profiles of the fluid inclusions confirm Au and Ag is not present in solution, being present as numerous particles. We have quantified the concentration of gold in fluid inclusions which are orders of magnitude greater than has been previously measured or thought likely in crustal fluids. The average Ag concentration is c. 32 ppm and Au is c. 41 ppm but the maximum concentrations of both may reach several 100's to 1000 ppm. Calcite forms a coating on the inner surface of the inclusions and barite, pyrite, galena, sphalerite and unidentified minerals are also present with the Au-Ag particles. It is clear that the Au-Ag particles could not have precipitated in the fluid inclusions, therefore they must have precipitated elsewhere and been carried with the hydrothermal fluid. The high concentrations and their colloidal nature have implications for the enrichment of gold in mineral deposits.

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Section: Geological Settingmentioning

confidence: 99%

Direct observation and measurement of Au and Ag in epithermal mineralizing fluids

Banks

Bozkaya

2019

Ore Geology Reviews

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“…1 B; e.g., Dikmen porphyry Mo-Cu±Au mineralization, 51.9 ± 2.6 to 46.6 ± 2.3 Ma; whole-rock K/Ar; Yiğit 2012 ). The second Phase II (42 to 35 Ma) includes widespread volcanism and plutonism in the central part of the peninsula (e.g., Eocene Kuşçayır, Kapıdağ plutons, and Yeniköy stock), and is associated with several porphyry-epithermal Au-Ag-Cu deposits, including the Halilağa porphyry Cu (39.6 ± 0.21 Ma; molybdenite Re-Os; Brunetti 2016 ), Kartaldağ HS Au (38.8 ± 0.7 Ma; alunite-quartz-rich whole-rock 40 Ar/ 39 Ar; Yiğit 2012 ), and the Valley porphyry Cu-Au (Kuscayir district; 40.2 ± 0.4 Ma; zircon U-Pb; Smith et al 2016 ) deposits, which are typical examples of the Phase II. The youngest Phase III (30–18 Ma) is associated with more abundant hydrothermal centers than the earlier magmatic phases.…”

Section: Discussionmentioning

confidence: 99%

“…The Permian Çamlıca metamorphic basement rocks within the Kirazlı deposit consist of quartz-mica schist and phyllite with subordinate marble blocks (Fig. 2 ; Yiğit 2012 ; Smith et al 2014 ; Cormier et al 2017 ). They crop out mainly at the eastern margin of the Kirazlı deposit, and are overlain by sandstone, mudstone, and conglomerate of the Permo-Triassic Karakaya Complex (Fig.…”

Section: Geological Setting Of the Kirazlı Depositmentioning

confidence: 99%

“…In the Biga Peninsula, several spatially associated PCDs and HS epithermal systems (e.g., Aladağ, Halilağa) with unclear temporal relationships have been reported (Yiğit 2012 ; Hetman et al 2014 ; Smith et al 2014 ; Brunetti 2016 ; Kuşcu et al 2019b . Recent detailed studies on the geology and the temporal association of overprinting mineralization styles in individual deposits have questioned any coeval character of PCDs and HS epithermal systems in the Biga Peninsula, and have opened the debate about spatially associated, but genetically unrelated PCDs and HS epithermal systems (Brunetti 2016 ; Leroux 2016 ; Aluç et al 2021 ).…”

Section: Introductionmentioning

confidence: 99%

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Protracted metallogenic and magmatic evolution of the Kirazlı epithermal Au-Ag and porphyry Cu deposits, Biga Peninsula, NW Turkey: evidence from zircon U-Pb, muscovite 40Ar/39Ar, and molybdenite Re-Os geochronology

Aluç,

Kuşcu,

Ulyanov

et al. 2023

Miner Deposita

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The Kirazlı deposit is located at the center of the Biga Peninsula metallogenic province, in a geological setting characterized by an extensional tectonic environment. A NNW-SSE trending high-sulfidation (HS) orebody with a total reserve of 33.86 Mt @ 0.69 g/t Au and 9.42 g/t Ag lies beneath the Kirazlı Main zone. A porphyry Cu orebody hosted by Eocene intrusive and volcanic rocks has been intersected by drilling within its vicinity. The HS epithermal deposit is hosted by a partly silicified and brecciated Oligocene volcanic and volcaniclastic sequence consisting mainly of basaltic andesite lava flow and lithic/crystal tuff. Lithogeochemistry and zircon U-Pb radiometric ages allow us to distinguish three distinct high-K calc-alkaline magmatic events at ca. 41, 38, and 32 Ma, sourced by metasomatized mantle melts, which have interacted with the crust during their ascent. Porphyry Cu mineralization took place at 36.7 ± 0.4 Ma (muscovite 40Ar/39Ar age) with subsequent re-opening and base metal deposition. Crosscutting quartz-pyrite-molybdenite veins were emplaced at 33.6 ± 0.2 Ma (molybdenite Re-Os age), and followed by the HS epithermal Au-Ag event at ca. 31 Ma, based on a previous study. Our radiometric data indicate that the Kirazlı deposit has recorded a long-lasting Cenozoic magmatic and metallogenic evolution during about 10 Myr. Our study demonstrates that successive, independent, and overprinting, but genetically unrelated, HS epithermal precious metal, hydrothermal Mo, base metal, and porphyry Cu systems have been active at the same location during protracted extensional tectonics of the Biga Peninsula.

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“…The Permian Çamlıca metamorphics form the basement of the Kirazlı district and are composed of marble blocks and dark grey to grey quartz-mica schist (Fig. 1, 2; [14,19,20]). They are mostly observed near the eastern margin of the Kirazlı district, where they are covered by conglomerate and low-grade metamorphosed sandstone-mudstone of the Permo-Triassic Karakaya complex (Fig.…”

Section: Geological Setting Of the Kirazlı Districtmentioning

confidence: 99%

Identifying Potential Porphyry Cu Mineralization at the Kirazli District in Biga Peninsula (Nw Turkey): Insights From the Mapping Hydrothermal Alteration by Using Shortwave Infrared (Swir) Spectrometry

Aluç

Kuşcu

Moritz

2023

Mugla Journal of Science and Technology

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The Kirazlı mineral district is located at the center of the Biga peninsula metallogenic province, in a geological setting characterized by an extensional tectonic environment. The district hosts a high-sulfidation (HS) ore body with a total reserve of 33.86 Mt @ 0.69 g/t Au and 9.42 g/t Ag within a large-scale hydrothermal alteration. Although the ideal magmatic-hydrothermal models present the spatial and temporal association of HS-epithermal and porphyry Cu deposits, the porphyry Cu potential at the Kirazlı has not been evaluated, yet. Therefore, the mineral-based alteration mapping with the help of SWIR reflectance spectroscopy was carried out. Our study demonstrates that nine different mineral zone have been distinguished and mapped: (1) Silicification, (2) Alunite, (3) Kaolinite, (4) Dickite, (5) Illite, (6) Pyrophyllite, (7) Chlorite, (8) Sericite, and (9) Montmorillonite zones. Collectively, these alterations exhibit a zoned pattern, from central massive silicification to residual silica, NW-SE oriented alunite, and marginal montmorillonite-illite zones within widespread kaolinite – dickite dominated alteration in Kirazlı main zone. The occurrence of pyrophyllite and sericite dominates at the SE of the Kirazlı district, which refers to relative temperature increase. Subsequent drilling confirms the potential for deep prospecting of porphyry Cu mineralization in the region.

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KUCUKDA : A NEW, HIGH SULFIDATION EPITHERMAL Au-Ag-Cu DEPOSIT AT THE TV TOWER PROPERTY IN WESTERN TURKEY

Cited by 13 publications

References 8 publications

Direct observation and measurement of Au and Ag in epithermal mineralizing fluids

Direct observation and measurement of Au and Ag in epithermal mineralizing fluids

Protracted metallogenic and magmatic evolution of the Kirazlı epithermal Au-Ag and porphyry Cu deposits, Biga Peninsula, NW Turkey: evidence from zircon U-Pb, muscovite 40Ar/39Ar, and molybdenite Re-Os geochronology

Identifying Potential Porphyry Cu Mineralization at the Kirazli District in Biga Peninsula (Nw Turkey): Insights From the Mapping Hydrothermal Alteration by Using Shortwave Infrared (Swir) Spectrometry

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