Repositorio Digital Sernageomin
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Caracterización de sectores con erosión en la ribera del Lago Chapo, comuna de Puerto Montt, región de Los Lagos
No full textInforme Técnico -- Unidad Ejecutora: Oficina Técnica Puerto Varas27 p
Estadísticas de Accidentabilidad Industria Extractiva Minera Año 2022 : Reporte al 30 de Junio de 2022
No full textDepartamento de Investigación de Accidentes y Sanciones15 p
Reinspección de remoción en masa en gruta de Lourdes, localidad de Mehuín, comuna de Mariquina, región de Los Ríos
Get PDFInforme Técnico -- Unidad Ejecutora: Dirección Regional de Los Ríos, Valdivia22 p
Geología y estructura del cuadrángulo Quebrada Arcas, región de Antofagasta, Chile
No full textInforme Registrado IR-23-10853 p
Lower Ordovician calcareous microfossils from the San Juan Formation, Argentina : A new type of calcitarch and its paleoenvironmental implications
No full textThe calcareous microfossils present in the Ordovician and Silurian carbonate successions around the world are limited to few studies and their biological affinities and environmental preferences remain indefinite. In the carbonate Ordovician San Juan Formation from the Cerro La Chilca section, a group of calcareous microfossils was recognized and, based on their size, they are included in the calcitarch classification. Two types of calcitarchs have been recognized, Type-III calcitarch: large spheres with a thin to medium wall (diameter ~250 μm), and Type-0 calcitarch: small spheres with a thin wall (diameter ~80 μm). The carbonate microfacies analysis of the lower part of the San Juan Formation allowed defining five successive microfacies: burrowed bioclastic wackestone (M1), peloidal intraclastic packstone-grainstone (M2), intraclastic floatstone (M3), intraclastic wackestone-packstone (M4) and bioclastic boundstone (M5). These microfacies are interpreted to range from shallow subtidal facies below wave action to shoal and reef facies. It is possible to infer that the recovered calcitarchs show variations in size in relation to the facies that contain them. The calcitarchs recognized in wackestone-type facies are the Type-0 calcitarch and those recovered from the packstone-grainstone facies are the Type-III calcitarch. The calcitarch sizes variation probably is related to a gradual increase of energy within a shallow subtidal environment. Occurrences of calcitarchs within the Floian Oepikodus evae-O. intermedius conodont zone extends their fossil record into the Early Ordovician.pp.302-31
Lower Ordovician calcareous microfossils from the San Juan Formation, Argentina : A new type of calcitarch and its paleoenvironmental implications
No full textThe calcareous microfossils present in the Ordovician and Silurian carbonate successions around the world are limited to few studies and their biological affinities and environmental preferences remain indefinite. In the carbonate Ordovician San Juan Formation from the Cerro La Chilca section, a group of calcareous microfossils was recognized and, based on their size, they are included in the calcitarch classification. Two types of calcitarchs have been recognized, Type-III calcitarch: large spheres with a thin to medium wall (diameter ~250 μm), and Type-0 calcitarch: small spheres with a thin wall (diameter ~80 μm). The carbonate microfacies analysis of the lower part of the San Juan Formation allowed defining five successive microfacies: burrowed bioclastic wackestone (M1), peloidal intraclastic packstone-grainstone (M2), intraclastic floatstone (M3), intraclastic wackestone-packstone (M4) and bioclastic boundstone (M5). These microfacies are interpreted to range from shallow subtidal facies below wave action to shoal and reef facies. It is possible to infer that the recovered calcitarchs show variations in size in relation to the facies that contain them. The calcitarchs recognized in wackestone-type facies are the Type-0 calcitarch and those recovered from the packstone-grainstone facies are the Type-III calcitarch. The calcitarch sizes variation probably is related to a gradual increase of energy within a shallow subtidal environment. Occurrences of calcitarchs within the Floian Oepikodus evae-O. intermedius conodont zone extends their fossil record into the Early Ordovician.pp.302-31
Visita técnica a campamentos y terrenos de oportunidad en la ciudad de Antofagasta, Región de Antofagasta
No full textRevisor: Alejandro Alfaro S. -- Informe Técnico -- Unidad Ejecutora: Unidad de Asistencias Técnicas y Emergencias Geológicas, Santiago29 p
Visita Técnica por Remociones en Masa en Ruta N-55, Sector Las Trancas, Comuna de Pinto, Región del Ñuble
Get PDFRevisor: Alejandro Alfaro -- Informe Técnico -- Unidad Ejecutora: Unidad de Asistencias Técnicas y Emergencias Geológicas. Santiago15 p
Remociones en masa : ¿Qué son y por qué ocurren en la región de Antofagasta?
No full textCorresponde a anexo de BSNGM 16371 DVD: Zonificación de áreas expuestas a peligros de remoción en masa en la región de Antofagasta ; Xterrae Geologí