Forearc extension: tectonics, sedimentologic, and stratigraphic evolution of the East Pisco basin

• Autores: León Lecaros, Walther Ricardo, Aleman R., Antenor M.
• Formato: objeto de conferencia
• Fecha de Publicación: 2002
• Institución: Instituto Geológico, Minero y Metalúrgico
• Repositorio: INGEMMET-Institucional
• Lenguaje: español
• OAI Identifier: oai:repositorio.ingemmet.gob.pe:20.500.12544/3565
• Enlace del recurso: https://hdl.handle.net/20.500.12544/3565
• Nivel de acceso: acceso abierto
• Materia: Estratigrafía; Modelos tectónicos; Sedimentación; Tectónica; http://purl.org/pe-repo/ocde/ford#1.05.00; http://purl.org/pe-repo/ocde/ford#1.05.06; Cuenca Pisco Oriental

Pervasive transtensional defonnation has taken place in the East Pisco forearc basin as a result of oblique convergen ce. A crooked rhombic fault pattern is present in a narrow extensional corridor in the western part of the basin and may reflect the influence of pre-existing Costal Cordillera fabrics. Regardless of the structural origin of the basin, a tectonic-sedimentary model is proposed that may explain the Cenozoic basin evolution in four distinctive stages: l. Middle Eocene extension and half-graben formation. 2. Late Oligocene extension, polarity change and full graben fonnation. 3. Middle Miocene uplift and extension renewal. 4. Late Pliocene to Pleistocene basin inversion and uplift.