Configuración geológica-estructural y mapa prospectivo mineral de la Quebrada Toro Muerto
Cargando...
Archivos
Fecha
2020
Autores
Facultad/escuela
Idioma
es
Título de la revista
ISSN de la revista
Título del volumen
Editor
Universidad Andrés Bello
Nombre de Curso
Licencia CC
Licencia CC
Resumen
La Quebrada Toro Muerto (QTM), ubicada al noreste de Vallenar, entre los
28°30'S y 28°32'S, se enmarca hacia el borde suroriental de la cuenca de
Chañarcillo, en donde, a pesar de la abundante información geológica disponible,
faltan estudios que permitan determinar los controles en la mineralización a fin
de establecer nuevos indicadores para la exploración mineral. En ese sentido, el
presente trabajo propone nuevas directrices para la búsqueda de depósitos
minerales mediante la caracterización geológica-estructural, cuya metodología
de trabajo se desarrolla a partir de tecnologías aerotransportadas y sensores
remotos, de las cuales derivaron los principales elementos utilizados en las
distintas etapas de este trabajo: ortomosaico, DEM, TMI, FVD, RTP, imágenes
satelitales (BING y GoogleEarth) y multiespectrales (ASTER).
La geología de la QTM está constituida por secuencias volcánicas del Jurásico y
secuencias marinas carbonatadas del Cretácico; y por estructuras normales e
inversas, algunas con componente dextral, de orientación NS-NNE. La
arquitectura y configuración geológica-estructural de la QTM deriva de los
sucesivos pulsos tectónicos compresivos-transpresivos que han afectado a la
cuenca de Chañarcillo desde el Mesozoico Superior, los cuales invirtieron las
estructuras, además de alzar y deformar las secuencias litológicas. La inversión
tectónica positiva de estructuras como la Falla Muyuy habría propiciado el
emplazamiento de cuerpos magmáticos en los niveles basales volcánicos de la
Formación Punta del Cobre y el eventual ascenso de fluidos mineralizadores. En
ese sentido, se reconoce un control estructural en la mineralización mediante la
identificación de blancos de exploración mineral en torno a la Falla Muyuy.
La detallada caracterización de atributos geológicos lograda por medio de
tecnologías aerotransportadas, sensores remotos y óptimas campañas de
terreno, permitió establecer seis directrices para la búsqueda de depósitos
minerales, las cuales se disponen como una alternativa segura, eficiente, eficaz
y de bajo costo para llevar a cabo estudios geológicos y de prospección mineral.
The Quebrada Toro Muerto (QTM), located northeast of Vallenar, between 28°30'S and 28°32'S, is framed towards the southeast edge of the Chañarcillo basin, where, despite the abundant geological information available, studies lack of information for determining controls on mineralization in order to establish new indicators for mineral exploration. In this sense, this work proposes new guidelines for the search for mineral deposits through geological-structural characterization at depth, whose work methodology is developed from airborne technologies and remote sensors, from which the main elements used in the different stages derived of this work are: orthomosaic, DEM, TMI, FVD, RTP, satellite images (BING and GoogleEarth) and multispectral (ASTER). The geology of the QTM is made up of Jurassic volcanic sequences and Cretaceous carbonate marine sequences; and by normal and inverse structures, some with a dextral component, with NS-NNE orientation. The architecture and geological-structural configuration of the QTM derives from the successive compressive-transpressive tectonic pulses that have affected the Chañarcillo basin since the Upper Mesozoic, which inverted the structures, besides to lift and deforming the lithological sequences. The positive tectonic inversion of structures such as the Muyuy Fault, would have favored the location of magmatic bodies in the volcanic basal levels of the Punta del Cobre Formation, and the eventual rise of mineralizing fluids. In this sense, a structural control in mineralization is recognized by identifying mineral exploration targets around the Muyuy Fault. The detailed characterization of geological attributes achieved through airborne technologies, remote sensors and optimal terrain campaigns, allowed establishing six guidelines for the search for mineral deposits, which are arranged as a safe, efficient, effective and low-cost alternative to carry conduct geological and mineral prospecting studies.
The Quebrada Toro Muerto (QTM), located northeast of Vallenar, between 28°30'S and 28°32'S, is framed towards the southeast edge of the Chañarcillo basin, where, despite the abundant geological information available, studies lack of information for determining controls on mineralization in order to establish new indicators for mineral exploration. In this sense, this work proposes new guidelines for the search for mineral deposits through geological-structural characterization at depth, whose work methodology is developed from airborne technologies and remote sensors, from which the main elements used in the different stages derived of this work are: orthomosaic, DEM, TMI, FVD, RTP, satellite images (BING and GoogleEarth) and multispectral (ASTER). The geology of the QTM is made up of Jurassic volcanic sequences and Cretaceous carbonate marine sequences; and by normal and inverse structures, some with a dextral component, with NS-NNE orientation. The architecture and geological-structural configuration of the QTM derives from the successive compressive-transpressive tectonic pulses that have affected the Chañarcillo basin since the Upper Mesozoic, which inverted the structures, besides to lift and deforming the lithological sequences. The positive tectonic inversion of structures such as the Muyuy Fault, would have favored the location of magmatic bodies in the volcanic basal levels of the Punta del Cobre Formation, and the eventual rise of mineralizing fluids. In this sense, a structural control in mineralization is recognized by identifying mineral exploration targets around the Muyuy Fault. The detailed characterization of geological attributes achieved through airborne technologies, remote sensors and optimal terrain campaigns, allowed establishing six guidelines for the search for mineral deposits, which are arranged as a safe, efficient, effective and low-cost alternative to carry conduct geological and mineral prospecting studies.
Notas
Tesis (Geólogo)
Palabras clave
Mineralización, Prospección, Chile, Chañarcillo