Topografía digital y modelado de lahares en el Volcán Copahue, Argentina-Chile

Tesis (Magister en Aplicaciones de Información Espacial)--Universidad Nacional de Córdoba, Facultad de Matemática, Astronomía, Física y Computación, 2020.Maestría conjunta con el Instituto de Altos Estudios Espaciales "Mario Gulich"-CONAE.Registros geológicos y reportes de eventos eruptivos históricos, sugieren una recurrencia de lahares en el estratovolcán Copahue (Chile-Argentina). En este trabajo se analizó la amenaza por lahares mediante simulaciones con LAHARZ, corridas sobre el modelo digital de elevación WorldDEM (12 m) y un modelo creado con imágenes SPOT 7 (5 m). Adicionalmente se emplearon los modelos SRTM (30 m), ALOS 3D World (30 m) y ASTER GDEM (30 m), para analizar la sensibilidad de LAHARZ. Los resultados sugieren que las comunidades dentro de un radio de 40 km desde el volcán, podrían ser alcanzadas con lahares de magnitudes entre 10 4 y 10 7 m3.Geological records and reports of historical eruptive events suggest a recurrence of lahars in the Copahue stratovolcano (Chile-Argentina). In this work, the lahar hazard was analyzed through simulations with LAHARZ, runs on the WorldDEM digital elevation model (12 m) and a model created with SPOT 7 images (5 m). Additionally, the SRTM (30 m), ALOS 3D World (30 m) and ASTER GDEM (30 m) models were used to analyze the sensitivity of LAHARZ. The results suggest that communities within a radius of 40 km from the volcano could be reached with lahars of magnitudes between 10 4 and 10 7 m3.Fil: Viotto, Sofía Alejandra. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía, Física y Computación; Argentina.Fil: Viotto, Sofía Alejandra. Universidad Nacional de Córdoba. Instituto de Altos Estudios Espaciales Mario Gulich; Argentina.Fil: Viotto, Sofía Alejandra. Comisión Nacional de Actividades Espaciales. Instituto de Altos Estudios Espaciales Mario Gulich; Argentina

A database of the elemental and isotopic composition of water and carbonates from a hypersaline Andean lake (Laguna del Peinado, Argentina)

The dataset presented here encompasses the results of the geochemical analyses of water and recent carbonate samples collected in the El Peinado basin located in the Southern Puna Plateau in Catamarca, Argentina. This system formed by the hypersaline lake Laguna del Peinado, numerous hydrothermal springs, and the small hypersaline lake Laguna Turquesa, provides a natural laboratory to study carbonate formation and the mechanisms that control the incorporation of various elements and isotopes into their structure under a broad range of geochemical conditions. Geochemical analyses include data on the physicochemical parameters, elemental, and isotopic (δ18O, δ2H, δ11B) composition of the waters, and data on the elemental and isotopic (δ18O, δ13C, δ11B) composition of the carbonates. These data allowed us to calculate element partition coefficients and isotopic fractionation between coupled water-carbonate samples from this natural setting, which are also included here. This dataset also includes the results of water modelling using the software PHREEQC, which contains data on the chemical speciation of carbon and boron, the species contributing to total alkalinity, and mineral saturation indices. This information is useful for all those dealing with geochemistry of hypersaline lakes, geochemistry of continental carbonates, as well as paleoenvironmental and paleoclimatic studies using lake carbonates as archives. These data correspond to the research article “On the origin and processes controlling the elemental and isotopic composition of carbonates in hypersaline Andean lakes”. The full description of the data is provided in the data description file