Esfuerzos actuales en la región del Arco de Scotia.
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1
Universidad de Granada
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2
Instituto Andaluz de Ciencias de la Tierra
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ISSN: 0213-683X
Año de publicación: 1996
Título del ejemplar: Comunicaciones presentadas en el IV Congreso Nacional de Geología, Alcalá de Henares, 1996
Número: 20
Páginas: 817-819
Tipo: Artículo
Otras publicaciones en: Geogaceta
Resumen
The study of the stresses in the Scotia Arc, determined by right dihedra diagrams of earthquake focal mechanisms, illustrates the present-day tectonics of the region. The Scotia Arc is a large sinistral fault zone, with NE-SW subhorizontal (δ1, where the relative motion between the Antarctic and South America plates is distributed. While the North Scotia Ridge is deformed by sinistral transpressive faults, related to the general stress field, the transpressive sinistral deformations in the Shackleton Fracture Zone are related to a stress field δ1 of WNW-ESE trend and subhorizontal. In the Bransfield Strait and in the South Scotia Ridge, stresses are extensional, with δ1 subvertical and δ3 trending NW-SE, and produce respectively in each region, normal and transtensive sinistral faults.