The Arauco Basin (Spanish: Cuenca de Arauco) is a sediment-filled depression –a sedimentary basin– in south-central Chile. In the context of plate tectonics it is classified as a forearc basin. The basin has an approximate area of 8,000 square kilometres (3,100 sq mi) and at its deeper parts the surface of its sedimentary fill reaches 200 metres (660 ft) below sea-level. The basin is interpreted as being part of an uplifted part of the continental shelf. To the west it bounds an active accretionary prism that lies next to the Chile trench and to the east it bounds metamorphic basement representing a fossil Paleozoic accretionary complex that has been intruded by the Coastal Batholith of central Chile.
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| - Arauco Basin (en)
- Cuenca de Arauco (es)
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| - The Arauco Basin (Spanish: Cuenca de Arauco) is a sediment-filled depression –a sedimentary basin– in south-central Chile. In the context of plate tectonics it is classified as a forearc basin. The basin has an approximate area of 8,000 square kilometres (3,100 sq mi) and at its deeper parts the surface of its sedimentary fill reaches 200 metres (660 ft) below sea-level. The basin is interpreted as being part of an uplifted part of the continental shelf. To the west it bounds an active accretionary prism that lies next to the Chile trench and to the east it bounds metamorphic basement representing a fossil Paleozoic accretionary complex that has been intruded by the Coastal Batholith of central Chile. (en)
- La cuenca de Arauco es una cuenca sedimentaria en el centro-sur de Chile. En el contexto de la tectónica de placas se clasifica como una cuenca de antearco. La cuenca tiene un área aproximada de 8 000 km² y, en sus partes más profundas, la superficie de su relleno sedimentario alcanza los 200 metros bajo el nivel del mar, y se desarrolla entre la vertiente occidental de la cordillera de Nahuelbuta y el límite externo de la plataforma submarina, incluyendo la extensión que se encuentra bajo las aguas del golfo de Arauco, entre las ciudades de Concepción y Cañete. La cuenca se interpreta como parte de una parte elevada de la plataforma continental. Al oeste limita con un prisma de acreción activo que se encuentra junto a la fosa de Perú-Chile y al este limita con un basamento metamórfico (es)
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| - Arauco Basin is located in the westernmost part of central Chile (en)
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| - Southwestern South America (en)
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| - -37.083333333333336 -73.16666666666667
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| - The Arauco Basin (Spanish: Cuenca de Arauco) is a sediment-filled depression –a sedimentary basin– in south-central Chile. In the context of plate tectonics it is classified as a forearc basin. The basin has an approximate area of 8,000 square kilometres (3,100 sq mi) and at its deeper parts the surface of its sedimentary fill reaches 200 metres (660 ft) below sea-level. The basin is interpreted as being part of an uplifted part of the continental shelf. To the west it bounds an active accretionary prism that lies next to the Chile trench and to the east it bounds metamorphic basement representing a fossil Paleozoic accretionary complex that has been intruded by the Coastal Batholith of central Chile. Traditionally the centre of coal mining in Chile, large-scale coal mining in Arauco Basin ended in the 1990s. Given a high density of geological faults that have displaced the coal beds and the thin nature of these (less than one metre) mining activity in Arauco Basin has proven difficult to mechanize. (en)
- La cuenca de Arauco es una cuenca sedimentaria en el centro-sur de Chile. En el contexto de la tectónica de placas se clasifica como una cuenca de antearco. La cuenca tiene un área aproximada de 8 000 km² y, en sus partes más profundas, la superficie de su relleno sedimentario alcanza los 200 metros bajo el nivel del mar, y se desarrolla entre la vertiente occidental de la cordillera de Nahuelbuta y el límite externo de la plataforma submarina, incluyendo la extensión que se encuentra bajo las aguas del golfo de Arauco, entre las ciudades de Concepción y Cañete. La cuenca se interpreta como parte de una parte elevada de la plataforma continental. Al oeste limita con un prisma de acreción activo que se encuentra junto a la fosa de Perú-Chile y al este limita con un basamento metamórfico que representa un complejo de acreción fósil del Paleozoico que ha sido invadido por el batolito costero de Chile central. Tradicionalmente, la cuenca se ha considerado el corazón de la minería del carbón en Chile, aunque la actividad minera a gran escala en la cuenca de Arauco terminó en la década de 1990. Dada la alta densidad de fallas geológicas que han desplazado los lechos de carbón y la naturaleza delgada de estas (con menos de un metro de espesor), la actividad minera en la cuenca de Arauco ha demostrado ser difícil de mecanizar. (es)
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| - Accretionary prism of the Chile trench (en)
- Accretionary complex intruded by the Coastal Batholith of central Chile (en)
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