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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

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Other title
Subject/Keyword
Buriticá Gold Deposit
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Lesage, Guillaume
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
Department of Earth and Atmospheric Sciences
Specialization

Date accepted
2011-09-28T18:54:52Z
Graduation date
2011-11
Degree
Master of Science
Degree level
Master's
Abstract
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.
Language
English
DOI
doi:10.7939/R35M0M
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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