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Permanent link (DOI): https://doi.org/10.7939/R35M0M
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Geochronology, Petrography, Geochemical Constraints, and Fluid Characterization of the Buriticá Gold Deposit, Antioquia Department, Colombia Open Access
- Other title
Buriticá Gold Deposit
- Type of item
- Degree grantor
University of Alberta
- Author or creator
- Supervisor and department
Richards, Jeremy P. (Earth and Atmospheric Sciences)
- Examining committee member and department
Boisvert, Jeff (Civil and Environmental Engineering)
Muehlenbachs, Karlis (Earth and Atmospheric Sciences)
Department of Earth and Atmospheric Sciences
- Date accepted
- Graduation date
Master of Science
- Degree level
Buriticá is a low- to intermediate-sulfidation epithermal gold deposit located 75 km north of Medellín, in Colombia. It is hosted by the Buriticá andesite porphyry, a shallow intrusive rock dated at 7.41 ± 0.40 Ma (40Ar/39Ar on hornblende), which intrudes the Cretaceous Cañasgordas Group and Buriticá stock.
Gold mineralization is associated with a proximal sericite-adularia and a distal epidote-rich propylitic alteration, and is hosted in two different sets of veins respectively striking and dipping around 072°/87°S and 105°/87°S. Hydrothermal sericite yields an age of 7.74 ± 0.08 Ma.
Sulfur isotope and fluid inclusion data indicate that a hot and saline fluid (>300°C, average 5.5 wt.% NaCl equiv.) of magmatic origin mixed with a cooler and less saline meteoric fluid. Boiling conditions were observed in quartz crystals coeval with the timing of gold mineralization, therefore boiling is believed to be the main control on gold precipitation.
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