Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Geological and geophysical investigations at Sierra del Medio massif, Argentina
Abstract Geological investigations were performed at Sierra del Medio (Cushamen County, Chubut Province in Central Patagonia), a mountainous massif of about 25 km by 8 km of migmatic origin, which emerges from a depressed tectonic trench or graben called Pampa de Gastre. The most ancient rocks belong to biotitic and amphibolic schist that passed almost entirely to tonalitoid migmatites with a second process producing granitic rocks. Boreholes were drilled on the basis of conclusions from Landsat satellite imagery and aerial photographic sets, followed by field work on geological, petrographic, geophysical and hydrogeological features at surface, structural interpretation supported by geostatistical computations. Two sets of boreholes were drilled to investigate, subsurface rock behaviour at 300 m depth and 800 m depth respectively, beginning at peripheral places and ending at the central part or selected site. Basic purposes of boreholes were to define structural and petrographic features of the rock massif by a good comprehension of master joints and faulting distribution with its belts of alteration, mylonitization or brecciation, mechanical properties of samples, chemical composition and variations, petrographic facies and mineralogy. Boreholes provided data to investigate joints, faults and dikes as general discontinuities for hydraulic research such as permeability or effective hydraulic conductivity, and their geostatistical modelling. Boreholes are also being prepared for geophysical logging from which thermal logs have already been completed.
Geological and geophysical investigations at Sierra del Medio massif, Argentina
Abstract Geological investigations were performed at Sierra del Medio (Cushamen County, Chubut Province in Central Patagonia), a mountainous massif of about 25 km by 8 km of migmatic origin, which emerges from a depressed tectonic trench or graben called Pampa de Gastre. The most ancient rocks belong to biotitic and amphibolic schist that passed almost entirely to tonalitoid migmatites with a second process producing granitic rocks. Boreholes were drilled on the basis of conclusions from Landsat satellite imagery and aerial photographic sets, followed by field work on geological, petrographic, geophysical and hydrogeological features at surface, structural interpretation supported by geostatistical computations. Two sets of boreholes were drilled to investigate, subsurface rock behaviour at 300 m depth and 800 m depth respectively, beginning at peripheral places and ending at the central part or selected site. Basic purposes of boreholes were to define structural and petrographic features of the rock massif by a good comprehension of master joints and faulting distribution with its belts of alteration, mylonitization or brecciation, mechanical properties of samples, chemical composition and variations, petrographic facies and mineralogy. Boreholes provided data to investigate joints, faults and dikes as general discontinuities for hydraulic research such as permeability or effective hydraulic conductivity, and their geostatistical modelling. Boreholes are also being prepared for geophysical logging from which thermal logs have already been completed.
Geological and geophysical investigations at Sierra del Medio massif, Argentina
Jorge, Llambíast Eduardo (Autor:in) / Carlos, Perucca Juan (Autor:in) / Horacio, Puigdomenech Héctor (Autor:in) / Edgardo, Cebrelli (Autor:in) / Esteban, Castro Carlos (Autor:in) / Ivan, Grassi José (Autor:in) / Inés, Salinas Leonor (Autor:in)
1986
Aufsatz (Zeitschrift)
Englisch
Geophysical survey planning for the Dounreay and Sellafield geological investigations
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