Hot spring arsenic distribution in the Andes Cordillera (18-52oS)

1 página.-- Resumen presentado en el 23rd International Applied Geochemistry Symposium (IAGS), Oviedo, 14-19 Jun. 2007.-- Edited by Jorge Loredo Pérez.One of the most extensive areas around the world where the low quality of groundwater due to the presence of high concentrations of arsenic of natural origin is a major concern is Argentina-Chile. The exhaustive knowledge of the geological, hydrogeological, and geochemical setting can be very effective to define an alternative strategy to mitigate the arsenic problem in water. The magnitude and extension of the arsenic affected areas is not well known. In order to understand the source of the arsenic, the development of a database of thermal waters in the Andean region is in progress. We present in this work the assessment of more than 360 hot springs and wells located in the Andes between 14 and 52oS of latitude. This information comes from projects carried out by our team in the area and from references. The hot waters with higher concentrations of arsenic (50-30,000 μg/l) are mainly located in volcanic areas with hydrothermal activity of the Andes Cordillera between 14 and 28oS.Peer reviewe

Hydrogeochemical processes in groundwater from the Salar of Pipanaco (Catamarca, NW Argentina)

1 página.-- Resumen presentado en el 23rd International Applied Geochemistry Symposium (IAGS), Oviedo, 14-19 Jun. 2007.-- Edited by Jorge Loredo Pérez.The hydrological basin of the Salar of Pipanaco is mainly located in the South of Catamarca Province (NW Argentina). It is a typical and large (17,200 km2) endorheic basin of tectonic origin situated in the Eastern Andes that has been dissected in the South by the Colorado River during the Plio-Quaternary. Climate is arid and the recharge is by the precipitation in the high surrounding mountains (El Manchao, 4,552 m.a.s.l.). Thermal artesian wells as well as new perforations exploited by new agricultural initiatives have been sampled in the western margin of the Salar of Pipanaco. New wells show the extents of several tens of kilometers to the north of the geothermal field. Hydrochemical results (major ions and 57 trace elements) allow to us fingerprint the origin of the groundwater and its path by the eastern margin of the Salar which is very affected by the real tectonics (it is a very active seismic area). Groundwater quality is excellent but must be managed carefully to avoid the overexploitation because of the low recharge.Peer reviewe

Hot spring arsenic distribution in the Andes Cordillera (18-52oS)

1 página.-- Resumen presentado en el 23rd International Applied Geochemistry Symposium (IAGS), Oviedo, 14-19 Jun. 2007.-- Edited by Jorge Loredo Pérez.One of the most extensive areas around the world where the low quality of groundwater due to the presence of high concentrations of arsenic of natural origin is a major concern is Argentina-Chile. The exhaustive knowledge of the geological, hydrogeological, and geochemical setting can be very effective to define an alternative strategy to mitigate the arsenic problem in water. The magnitude and extension of the arsenic affected areas is not well known. In order to understand the source of the arsenic, the development of a database of thermal waters in the Andean region is in progress. We present in this work the assessment of more than 360 hot springs and wells located in the Andes between 14 and 52oS of latitude. This information comes from projects carried out by our team in the area and from references. The hot waters with higher concentrations of arsenic (50-30,000 μg/l) are mainly located in volcanic areas with hydrothermal activity of the Andes Cordillera between 14 and 28oS.Peer reviewe

Complejo intrusivo La Majada (Sierras Pampeanas): magmatismo sintectónico en zonas de cizalla

2 páginas.-- Resumen de la 1ª Jornada Geológica de la Fundación Miguel Lillo, 22 de Junio de 2006.Peer reviewe

Caracterización de cenizas volcánicas y su influencia en la calidad de las aguas superficiales de la región de Antofagasta de la Sierra, Catamarca, Argentina

4 páginas.-- Trabajo presentado en el VII Congreso Geológico de España, Canarias 2008.-- Vulcanología.Este trabajo se llevó a cabo en el marco del Grupo de Investigación Consolidado SGR - 2005 - 795 PEGEFA (Petrología y Geoquímica Fundamental y Aplicada), financiado por AGAUR - DURSI, Generalitat de Catalunya.Peer reviewe