Origin and evolution of fluids associated with the Cerrro Quema Au-Cu deposit (Azuero Peninsula, Panama): evidence from microthermometry, O, H and S isotopes

Corral, Isaac, Cardellach, Esteve, Corbella, Mercè, Canals, Àngels, and Johnson, Craig A. (2011) Origin and evolution of fluids associated with the Cerrro Quema Au-Cu deposit (Azuero Peninsula, Panama): evidence from microthermometry, O, H and S isotopes. In: Proceedings of the Eleventh Biennial SGA meeting: Let's Talk Ore Deposits (1), pp. 178-180. From: Let's Talk Ore Deposits: eleventh biennial SGA meeting, 26-29 September 2011, Antofagasta, Chile.

[img] PDF (Published Version) - Published Version
Restricted to Repository staff only

View at Publisher Website: http://e-sga.org/shop/product-details/?c...
 
2


Abstract

The Cerro Quema Au-Cu deposit is located in the Azuero Peninsula, Panama. Although the geology of the area is not well known recent studies have only focused on the economic potential of gold. In the present work, mineralogical, fluid inclusion and stable isotope data are presented in order to understand the origin and evolution of the hydrothermal system of this Au-Cu deposit.

Secondary fluid inclusions in magmatic quartz phenocrysts have an average homogenization temperature (Th) of 205°C and ice melting temperatures (Tmi) are around -1.2°C. δ18O values of the fluid in equilibrium with vuggy silica at 250°C range from +1.5 to +9.1‰. δ18O values of the fluid in equilibrium with kaolinite range from -5.70 to 14.07‰. The high δ34S values of alunite (≈+17‰) together with the negative values of coexisting pyrite and enargite (≈-8‰) are compatible with a magmatic hydrothermal origin of alunite. Ore deposition took place from fluids of low salinity (≈2% wt NaCl eq.) and moderate temperatures (≈250°C). O and D data of silicates and sulfates suggest a contribution of surface fluids during hydrothermal alteration and ore deposition.

Item ID: 40235
Item Type: Conference Item (Research - E1)
ISBN: 978-956-287-329-1
Keywords: Cerro Quema, Au-Cu deposit, fluid inclusions, H-O-S isotopes
Related URLs:
Funders: Ministerio de Ciencia e Innovación, Spain (MCI)
Date Deposited: 01 Sep 2015 03:25
FoR Codes: 04 EARTH SCIENCES > 0402 Geochemistry > 040203 Isotope Geochemistry @ 40%
04 EARTH SCIENCES > 0403 Geology > 040307 Ore Deposit Petrology @ 30%
04 EARTH SCIENCES > 0403 Geology > 040306 Mineralogy and Crystallography @ 30%
SEO Codes: 84 MINERAL RESOURCES (excl. Energy Resources) > 8401 Mineral Exploration > 840102 Copper Ore Exploration @ 50%
84 MINERAL RESOURCES (excl. Energy Resources) > 8401 Mineral Exploration > 840105 Precious (Noble) Metal Ore Exploration @ 50%
Downloads: Total: 2
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page