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- Title
Textural and genetic investigations of gold mineralization in fault-controlled quartz-carbonate veins in Bayburt-Zarani area (Eastern Pontides-NE Turkey).
- Authors
TÜYSÜZ, Necati; YAYLALI-ABANUZ, Gülten; GÜMRÜK, Oğuzhan; AR, Bahrican
- Abstract
The Eastern Pontides Orogenic Belt (EPOB), geographically corresponding to the northeastern part of Turkey hosts several different types of mineralizations that are closely related to Late Mesozoic-Early Cenozoic arc magmatism. Of these, Zarani gold mineralization, which is located in the southern part of the EPOB occurs as quartz-carbonate veins/veinlets within the Pulur metamorphic massif of Paleozoic age. Mineral textures indicate low-temperature vein-type mineralization. Gold mainly occurs in quartz and pyrite. The presence of calcite, dolomite, and sericite in the mineralization indicates near neutral pH conditions of ore-forming fluid. Geochemical analyses of chlorites in the quartz-carbonate veins reveal a temperature of ore formation at 140-297 °C, which is compatible with those obtained from fluid inclusions in the mineralized quartz (i.e. 132-226 °C). The average salinity value obtained from fluid inclusions is 4.32% NaCl equiv. O and H isotope values range from -6.03? to +1.47? and from -60? to -119?, respectively, indicating a mixture of magmatic and meteoric fluids. Mixing is also evidenced by the XFe analytical data of hydrothermal chlorites associated with ore-forming gangue minerals. Gold precipitation in Zarani mineralization is caused by boiling. The occurrence of mineralization within quartz-carbonate vein/veinlets in metamorphic host rocks, the mineral paragenesis with near-neutral pH conditions of the ore-forming low salinity fluids and the H-O isotopic data imply that the Zarani gold mineralization is an orogenic type epithermal mineralization that may be related to deeply buried Early Cenozoic felsic intrusions, produced by subduction-induced processes in the southern part of the EPOB.
- Subjects
TURKEY; GOLD ores; VEINS (Geology); QUARTZ; MINERALIZATION; FLUID inclusions; OROGENIC belts; METAMORPHIC rocks
- Publication
Turkish Journal of Earth Sciences, 2023, Vol 32, Issue 5, p577
- ISSN
1300-0985
- Publication type
Article
- DOI
10.55730/1300-0985.1863