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Textural and genetic investigations of gold mineralization in fault-controlled quartz-carbonate veins in Bayburt-Zarani area (Eastern Pontides-NE Turkey).
- Source :
-
Turkish Journal of Earth Sciences . 2023, Vol. 32 Issue 5, p577-600. 24p. - Publication Year :
- 2023
-
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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13000985
- Volume :
- 32
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Turkish Journal of Earth Sciences
- Publication Type :
- Academic Journal
- Accession number :
- 171802719
- Full Text :
- https://doi.org/10.55730/1300-0985.1863