To cite this record: http://ddd.uab.cat/record/89058
Geology of the Cerro Quema Au-Cu deposit (Azuero Peninsula, Panama)
Corral, Isaac (Universitat Autònoma de Barcelona. Departament de Geologia)
Griera i Artigas, Albert (Universitat Autònoma de Barcelona. Departament de Geologia)
Gómez-Gras, David (Universitat Autònoma de Barcelona. Departament de Geologia)
Corbella i Cordomí, Mercè (Universitat Autònoma de Barcelona. Departament de Geologia)
Canals i Sabaté, Àngels (Universitat de Barcelona. Facultat de Geologia)
Pineda-Falconett, M. (Universidad de Panamá. Departamento de Geografía)
Cardellach López, Esteve (Universitat Autònoma de Barcelona. Departament de Geologia)

Date: 2011
Abstract: The Cerro Quema district, located on the Azuero Peninsula, Panama, is part of a large regional hydrothermal system controlled by regional faults striking broadly E-W, developed within the Río Quema Formation. This formation is composed of volcanic, sedimentary and volcano-sedimentary rocks indicating a submarine depositional environment, corresponding to the fore-arc basin of a Cretaceous–Paleogene volcanic arc. The structures observed in the area and their tectono-stratigraphic relationship with the surrounding formations suggest a compressive and/or transpressive tectonic regime, at least during Late Cretaceous–Oligocene times. The igneous rocks of the Río Quema Formation plot within the calc-alkaline field with trace and rare earth element (REE) patterns of volcanic arc affinity. This volcanic arc developed on the Caribbean large igneous province during subduction of the Farallon Plate. Mineralization consists of disseminations of pyrite and enargite as well as a stockwork of pyrite and barite with minor sphalerite, galena and chalcopyrite, hosted by a subaqueous dacitic lava dome of the Río Quema Formation. Gold is present as submicroscopic grains and associated with pyrite as invisible gold. A hydrothermal alteration pattern with a core of advanced argillic alteration (vuggy silica with alunite, dickite, pyrite and enargite) and an outer zone of argillic alteration (kaolinite, smectite and illite) has been observed. Supergene oxidation overprinted the hydrothermal alteration resulting in a thick cap of residual silica and iron oxides. The ore minerals, the alteration pattern and the tectono-volcanic environment of Cerro Quema are consistent with a high sulfidation epithermal system developed in the Azuero peninsula during pre-Oligocene times.
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet l'ús comercial de l'obra i de les possibles obres derivades, la distribució de les quals s'ha de fer amb una llicència igual a la que regula l'obra original. Creative Commons
Language: Anglès
Document: article ; recerca ; publishedVersion
Subject: Panama ; Cerro Quema ; Au-Cu High sulfidation epithermal deposit ; Fore-arc basin ; Arc-magmatism
Published in: Geologica acta, Vol. 9, Núm. 3-4 (setembre-desembre 2011) , p. 481-498, ISSN 1696-5728

DOI: 10.1344/105.000001742


18 p, 845.7 KB

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Articles > Published articles > Geologica acta

 Record created 2012-04-13, last modified 2014-03-27



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