Title
The Peruvian sub-Andean foreland basin system: Structural overview, geochronologic constraints, and unexplored plays
Date Issued
01 January 2018
Access level
metadata only access
Resource Type
book part
Author(s)
Baby P.
Brusset S.
Roddaz M.
Brichau S.
Eude A.
Calves G.
Quispe A.
Ramirez L.
Bandach A.
Bolaños R.
Hurtado C.
Louterbach M.
Espurt N.
Université de Toulouse
Publisher(s)
American Association of Petroleum Geologists
Abstract
In the Peruvian sub-Andean foreland basin system, the construction of serial balanced cross-sections from a good set of structural data and an extensive knowledge of the stratigraphy and geodynamic evolution allow a more refined definition of the unexplored plays, as subthrusts, duplexes, or pre-Andean structures. Sequential restorations are proposed by coupling thermochronologic analyses with growth strata studies. The results show significant north-south variations in geometry, timing and rates of deformation, and foreland sedimentation. These latitudinal variations are not only related to the pre-Andean basins' inheritance but also to the interactions between thrusts propagation, erosion, and sedimentation. Thermochronologic ages correspond to the most recent thrust-related uplifts and are supplemented by the study of stratigraphic foreland basin records that can bring to light oldest tectonic events. North of the Peruvian sub-Andean zone, thrusts propagation is controlled by thick-skinned and thin-skinned salt tectonics. Northern thick-skinned tectonics has westward vergence and is inherited from a Middle Permian fold-and-thrust belt. To the south, thrusts deformation is largely controlled by the geometry of the preserved Paleozoic sedimentary wedge and becomes progressively thin skinned. Total sub-Andean shortening varies between 70 km (43 mi) in the north and 47 km (29 mi) in the south. Sub-Andean deformation started in the Late Cretaceous. After a period of quiescence during the middle Eocene, it reactivated and is still active. Three stages of sub-Andean deformation are clearly identified and help to define the preservation time in the suggested petroleum plays.
Start page
91
End page
119
Volume
117
Language
English
OCDE Knowledge area
Geociencias, Multidisciplinar
Scopus EID
2-s2.0-85047732977
ISBN
9780891813972
Source
AAPG Memoir
ISSN of the container
02718529
Sponsor(s)
This research project was conducted thanks to the IRD-PERUPETRO S.A. research agreement and the In-stitut Carnot ISIFoR. It received financial support from TOTAL and REPSOL for field surveys and laboratory analysis. Midland Valley is acknowledged for providing academic license of “Move” for structural modeling. We thank Pedro Kress, Gonzalo Zamora, Victor Ramos, and an anonymous reviewer for their interesting comments that helped improve the chapter.
Sources of information:
Directorio de Producción Científica
Scopus