Repositorio Digital Sernageomin
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Caracterización de remoción en masa por colapso de muro de contención en población Modelo, comuna de Puerto Montt, región de Los Lagos
Get PDFInforme Técnico INF-Los Lagos-10, 2022 -- Unidad Ejecutora: Oficina Técnica Puerto Varas14 p
Visita técnica a deslizamiento en ruta 115-CH, sector Monjes Blancos, comuna de San Clemente, Región del Maule
Get PDFRevisor: Carolina Jara I. y Alejandro Alfaro S. ; Informe Técnico20 p
Evaluación geológica de puntos de encuentro transitorio en las comunas de Curacautín y Lonquimay en caso de erupción del Complejo Volcánico Lonquimay, región de La Araucanía
No full textRevisores: Rodrigo Órdenes G. y Virginia Toloza T. ; Informe Técnico59 p
Reporte de visita técnica: sector Lasana, comuna de Calama, región de Antofagasta
No full textRevisor: Alejandro Alfaro y Carolina Jara6 p
The Iglesia basin (San Juan, Argentina), seismic interpretation, geometry basin, and implications for geothermal systems
No full textThe Iglesia basin, in the San Juan Province, is the northern part of a Cenozoic piggy-back basin (the Iglesia-Calingasta-Uspallata basin), located above of the active flat-slab subduction zone of western Argentina. This basin is located between two mountain ranges, the Cordillera Frontal to the west and the Precordillera to the east, affected by thin and thick skinned tectonics, respectively. It is elongated in a north-south direction (70 km) and has a maximum width of 35 km. We have analyzed 17 seismic reflection lines corresponding to more than 500 km of interpreted sections. A strong reflection at 0.5-2 s is interpreted as indicative of shales and sandstones in the upper part of the Agua Negra Formation (Carboniferous); this represents a seismic basement for the Iglesia basin clearly separating stratified (shallower) from chaotic (deeper) reflectors. Several high angle faults have been recognized in the interpreted seismic lines affecting the Neogene fill and even the basement; some of them correlate with structures observed at the surface such us El Tigre Fault System. A 3D model shows the seismic top of basement smoothly deepening down to 3,650 m beneath the Pismanta area. The basement continues upward to the east with a steeper slope clearly defining an asymmetrical shape for the basin. Moreover, there are three depocenters of similar maximum depths around the geothermal hot spring of the Pismanta center. Some of the interpreted faults may be helping in the outflow process of meteoric water heated by a normal geothermal gradient. Considering earthquake data framework, our observations correlate with transpressive deformation likely associated with El Tigre Fault System, which affects Neogene and Pleistocene strata of the Iglesia Group.pp.327-34
The Iglesia basin (San Juan, Argentina), seismic interpretation, geometry basin, and implications for geothermal systems
No full textThe Iglesia basin, in the San Juan Province, is the northern part of a Cenozoic piggy-back basin (the Iglesia-Calingasta-Uspallata basin), located above of the active flat-slab subduction zone of western Argentina. This basin is located between two mountain ranges, the Cordillera Frontal to the west and the Precordillera to the east, affected by thin and thick skinned tectonics, respectively. It is elongated in a north-south direction (70 km) and has a maximum width of 35 km. We have analyzed 17 seismic reflection lines corresponding to more than 500 km of interpreted sections. A strong reflection at 0.5-2 s is interpreted as indicative of shales and sandstones in the upper part of the Agua Negra Formation (Carboniferous); this represents a seismic basement for the Iglesia basin clearly separating stratified (shallower) from chaotic (deeper) reflectors. Several high angle faults have been recognized in the interpreted seismic lines affecting the Neogene fill and even the basement; some of them correlate with structures observed at the surface such us El Tigre Fault System. A 3D model shows the seismic top of basement smoothly deepening down to 3,650 m beneath the Pismanta area. The basement continues upward to the east with a steeper slope clearly defining an asymmetrical shape for the basin. Moreover, there are three depocenters of similar maximum depths around the geothermal hot spring of the Pismanta center. Some of the interpreted faults may be helping in the outflow process of meteoric water heated by a normal geothermal gradient. Considering earthquake data framework, our observations correlate with transpressive deformation likely associated with El Tigre Fault System, which affects Neogene and Pleistocene strata of the Iglesia Group.pp.327-34
Peligro de remociones en masa en ladera Pelluco, costado de ruta 7, Comuna de Puerto Montt, Región de Los Lagos
No full textInforme Técnico INF-Los Lagos-06, 2022 -- Unidad Ejecutora: Oficina Técnica Puerto Varas14 p
Francisco Munizaga Villavicencio (1945-2020) : The developer of geochronology and isotope geology in Chile
Get PDFpp.307-30
