Control Geológico-Estructural En Labores Subterráneas Del Área Minera Sacachispas
Fecha
2017
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Facultad de Ciencias Naturales. Universidad de Guayaquil
Resumen
El trabajo de titulación presentado a continuación contempla un control geológico estructural que fue realizado en el área Sacachispas, cantón Pasaje, provincia de El Oro, aplicando métodos de investigación establecidos en un reconocimiento minero para la determinación de zonas mineralógicas favorables y la caracterización de unidades geológicas estructurales localizadas en la zona mineralizada.
En el área de estudio se encontraron rocas metamórficas regionales de grado bajo a medio que corresponden a filitas, filitas esquistos, esquistos filíticos y esquistos que forman parte de la Unidad La Victoria del Grupo Tahuín de edad Paleozoica y ambiente volcano – sedimentario; a su vez el levantamiento geológico-estructural permitió definir zonas intensamente falladas donde se identificaron fallas normales e inversas de potencias variables con manifestaciones de millonita, sericita y limonita; en cuanto a las vetas éstas definieron un rumbo preferentemente marcado entre 305°-315°/60°-70° SW.
Finalmente, se estableció que los cuerpos intrusivos microdioríticos evidenciados en el frente Grafito (veta principal), no tienen relación alguna con la mineralización ya que no se han descubierto evidencias de stockwork con características mineralógicas interesantes. De esta manera se determinaron como zonas favorables aquellos sitios ubicados al sur del área minera ya que presentaron características litológicas de roca encajante tales como filitas, filitas Grafitosas, ya que por sus propiedades plásticas favorecen el emplazamiento de la mineralización, permitiendo así tener mayor potencia y volumen, con leyes de Au mayores a 10 g/T, siendo este un parámetro de referencia para continuar con la exploración y dar paso a nuevas labores.
The work of titration presented below contemplates a structural geological control that was carried out in the area Sacachispas, Canton Pasaje, Province of El Oro, applying methods of investigation established in a mining recognition for the Determination of favorable mineralogical zones and characterization of structural geological units located in the mineralized zone. In the area of study regional metamorphic rocks of low to medium degree were found, corresponding to phyllites, phyllites schist, and shales that are part of Unidad La Victoria of the Grupo Tahuin that is of Paleozoic age and volcano - sedimentary environment; in turn, the geological - structural survey allowed to define intensely failed zones where normal and inverse faults of variable powers with manifestations of millonite, cericite and limonite were identified. As for the veins, they defined a course marked preferably between 305°-315° / 60°-70° SW. Finally, it was established that the intrusive bodies microdioríticos evidenced in the front graphite (main vein), have no relation with the mineralization since no evidence of stockwork has been discovered with mineralogical characteristics Interesting. In this way they were determined as favorable zones those sites located to the south of the mining area because they presented characteristics lithological of rock encaser such as shale, shale graphite, because by their plastic properties they favor the Location of the mineralization, thus allowing to have greater power and volume, with laws of Au greater than 10 g/T, being this a parameter of reference to continue with the exploration and to give way to new tasks.
The work of titration presented below contemplates a structural geological control that was carried out in the area Sacachispas, Canton Pasaje, Province of El Oro, applying methods of investigation established in a mining recognition for the Determination of favorable mineralogical zones and characterization of structural geological units located in the mineralized zone. In the area of study regional metamorphic rocks of low to medium degree were found, corresponding to phyllites, phyllites schist, and shales that are part of Unidad La Victoria of the Grupo Tahuin that is of Paleozoic age and volcano - sedimentary environment; in turn, the geological - structural survey allowed to define intensely failed zones where normal and inverse faults of variable powers with manifestations of millonite, cericite and limonite were identified. As for the veins, they defined a course marked preferably between 305°-315° / 60°-70° SW. Finally, it was established that the intrusive bodies microdioríticos evidenced in the front graphite (main vein), have no relation with the mineralization since no evidence of stockwork has been discovered with mineralogical characteristics Interesting. In this way they were determined as favorable zones those sites located to the south of the mining area because they presented characteristics lithological of rock encaser such as shale, shale graphite, because by their plastic properties they favor the Location of the mineralization, thus allowing to have greater power and volume, with laws of Au greater than 10 g/T, being this a parameter of reference to continue with the exploration and to give way to new tasks.