Epithermal High Sulfidation Systems
High Sulfidation Systems at Maricunga Belt, northern
Chile
(see Vila & Sillitoe, 1991, Economic Geology, 1991,
v. 86, p. 1238-1260 and references therein).
Salar of Maricunga, about 10 km north of the Marte Mine,
northern Chile, view to the east. (Photo Lluís Fontboté, 1994.10-1/5).
Field trip group at the Marte Mine, Maricunga Belt,
northern Chile. (Photo Lluís Fontboté, 1994.10-1/17).
General view of the Marte Au-deposit, Maricunga Belt,
northern Chile, view to the northeast. (Photo Lluís Fontboté,
1994.10-1/36).
Au-rich porpyry at Marte Mine, northern Chile. (Photo
Lluís Fontboté, 1994.10-3/1).
Typical hard relief formed by vein with core of residual
or vuggy silica (advanced argillic alteration) Marte Mine, Maricunga Belt,
northern Chile. (Photo Lluís Fontboté, 1994.10-1/20).
Residual silica ("vuggy silica") with late native sulfur.
Marte Mine, Maricunga Belt, northern Chile. (Photo Lluís Fontboté,
1994.10-1/24).
Residual silica ("vuggy silica") with late native sulfur.
Marte Mine, Maricunga Belt, northern Chile. From left to right: Jorge Spangenberg,
Robert Moritz, Jeff Hedenquist. (Photo Lluís Fontboté, 1994.10-1/32).
General view of the Lobo Mine Mine, Maricunga Belt,
northern Chile. View to the southwest. (Photo Lluís Fontboté,
1994.10-3/19).
General view of the Lobo area, Maricunga Belt, northern
Chile. View to the west. (Photo Lluís Fontboté, 1994.10-3/23).
Hard relief formed by vein with core of residual silica
at the Lobo Au-deposit, Maricunga Belt, northern Chile. View to the south.
(Photo Lluís Fontboté, 1994.10-3/14).
Detail of the residual silica of the same vein. Same
silicification is also visible. (Photo Lluís Fontboté, 1994.10-3/11).
Typical sample of the residual silica flanked by kaolinite-alunite
samples representing a typical advanced argillic alteration. (Photo Lluís
Fontboté, 1994.10-3/13).
Liesegang rings following fractures on an altered volcanic
rock at the Lobo Au-deposit, Maricunga Belt, northern Chile. (Photo Lluís
Fontboté, 1994.10-3/06).
Typical zonation formed by very acid high sulfidation
fluids. From center to flanks: Residual silica (dark brown), kaolinite-alunite
(white), kaolinite-sericite light brown. Refugio Mine, Maricunga Belt, northern
Chile. (Photo Lluís Fontboté, 1994.10-4/06).
General view of the Coipa Au Mine, Maricunga Belt, Northern
Chile. (Photo Lluís Fontboté, 1994.10-4/37).
View of the Coipa Au Mine, Maricunga Belt, Northern
Chile. Yelow-whitish rocks denote advanced argillic alteration with abundant
alunite. (Photo Lluís Fontboté, 1994.10-5/06).
View of the Coipa Au Mine, Maricunga Belt, Northern
Chile. Yellow-whitish rocks denote advanced argillic alteration with abundant
alunite. (Photo Lluís Fontboté, 1994.10-5/11).
High sulfidation system Marcapunta-Smelter-San
Gregorio-Colqujirca, Colquijirca District, Central Peru
(see Fontboté and Bendezú, 1999, 5th Biennial
SGA Meeting, London, and references therein)
Typical vuggy (or residual) silica in the central part
of the Marcapunta Au-Ag prospect, Colquijirca District, Central Peru. (Photo
Lluís Fontboté, 1998.3/11).
Alunite-filled former K-Fd phenocryst in vuggy silica,
Marcapunta Au-Ag prospect, Colquijirca District, Central Peru. (Photo Lluís
Fontboté, 1998.3/06).
Enargite star in the Smelter mine, Colquijirca District,
Central Peru. (Photo Lluís Fontboté, 1998.3/20).
High sulfidation system at the Rodalquilar Au-Mine, southeast Spain
Typical vein with vuggy silica flanked by kaolinite-alunite
altered rocks, Open pit 2, bottom level, view towards the NE, Rodalquilar
Au-Mine, southeast Spain. (Photo Lluís Fontboté, 1998.5/04).
Typical vein with vuggy silica flanked by kaolinite-alunite
altered rocks. Open pit 2, level 250, view towards the NE, Rodalquilar Au-Mine,
southeast Spain. (Photo Lluís Fontboté, 1998.5/05).
Almadén Hg District, Spain
Cinnabar rich ore with native mercury, Entredicho mine,
Almadén district, Spain. (Photo Lluís Fontboté, 1998.5/26).
Native mercury in the Las Cuevas Mine, Almadén
district, Spain. (Photo Lluís Fontboté, 1998.5/20).
Photographs of a painting (Photo Lluís Fontboté,
1998.5/30)
... and of the old installation to obtain mercury
from cinnabar mine, Spain. (Photo Lluís Fontboté, 1998.5/28).
Detail of the cooling system of the old installation
to obtain mercury from cinnabar ore, Almadén Spain. (Photo Lluís
Fontboté, 1998.5/29).
Low sulfidation epithermal deposit
The Hycroft Sulphur Gold mine, Sulphur, Humboldt County,
Nevada, USA. (Photo Pierre Perroud, 2 Aug. 1993).
