The Huallaga foreland basin evolution: Thrust propagation in a deltaic environment, northern Peruvian Andes

Wilber Hermoza, Stéphane Brusset, Patrice Baby, Willy Gil, Martin Roddaz, Nicole Guerrero, Molando Bolaños

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

104 Citas (Scopus)

Resumen

The sub-Andean Huallaga basin is part of the modern retroforeland basin system of Peru. It corresponds to a thrust-and-fold belt superimposed on inverted and halokinetic structures and is characterized by Eocene-Pliocene, thick synorogenic series that have controlled the burial history of petroleum systems. Sedimentological analysis and a sequentially restored cross-section based on seismic data and new field studies show three sequences of synorogenic deposits. The Eocene (Lower Pozo member) developed in shoreface environments, when the basin morphology corresponded to a foresag depozone linked to an orogenic unloading period. The Middle Eocene sequence (Upper Pozo member) developed in shallow marine environments and recorded a change in Andean geodynamics and the retroforeland basin system. The basin morphology corresponded to a foredeep depozone linked to an orogenic loading period. This configuration remained until the Middle Miocene (Chambira Formation). The Middle Miocene-Pliocene sequence recorded the onset of the modern sub-Andean Huallaga basin that became a wedge-top depozone. Thrust propagation occurred in a deltaic environment, which evolved progressively to an alluvial system linked to the modern Amazon River.

Idioma originalInglés
Páginas (desde-hasta)21-34
Número de páginas14
PublicaciónJournal of South American Earth Sciences
Volumen19
N.º1 SPEC. ISS.
DOI
EstadoPublicada - may. 2005
Publicado de forma externa

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