Hermoza W., Brusset S., Baby Patrice, Gil W., Roddaz M., Guerrero N., Bolanos M. (2005). The Huallaga foreland basin evolution : thrust propagation in a deltaic environment, northern Peruvian Andes. Journal of South American Earth Sciences, 19 (1), p. 21-34. ISSN 0895-9811.
Titre du document
The Huallaga foreland basin evolution : thrust propagation in a deltaic environment, northern Peruvian Andes
Hermoza W., Brusset S., Baby Patrice, Gil W., Roddaz M., Guerrero N., Bolanos M.
Source
Journal of South American Earth Sciences, 2005,
19 (1), p. 21-34 ISSN 0895-9811
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 it wedge-top depozone. Thrust propagation occurred in a deltaic environment, which evolved progressively to an alluvial system linked to the modern Amazon River. (c) 2005 Published by Elsevier Ltd.
