About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract

AAPG Bulletin, V. 95, No. 1 (January 2011), P. 27-60.

Copyright copy2011. The American Association of Petroleum Geologists. All rights reserved.

DOI:10.1306/06301009165

Fault framework and kinematic evolution of Previous HitinversionNext Hit structures: Natural examples Previous HitfromNext Hit the Neuquen Basin, Argentina

Gabriel O. Grimaldi,1 Steven L. Dorobek2

1Department of Geology and Geophysics, Texas AampM University, College Station, Texas 77843; present address: Chevron Global Upstream and Gas, 1500 Louisiana Street, Houston, Texas 77382; [email protected]
2Department of Geology and Geophysics, Texas AampM University, College Station, Texas 77843; present address: BP America, 501 Westlake Park Boulevard, Houston, Texas 77079; [email protected]

ABSTRACT

Mesozoic tectonic Previous HitinversionNext Hit in the Neuquen Basin of west-central Argentina was investigated by analyzing a three-dimensional Previous HitseismicNext Hit and borehole Previous HitdataNext Hit set over prominent Previous HitinversionNext Hit structures related to transpressional tectonics along the Huincul arch. This conspicuous strike-slip deformation has been active since the Early Jurassic to Early Cretaceous and caused the reactivation of normal faults and the Previous HitinversionNext Hit of Triassic half grabens, some of which are imaged by the Previous HitseismicNext Hit Previous HitdataNext Hit. Detailed Previous HitstructuralNext Hit and stratigraphic mapping allowed the identification of two main fault systems associated with Previous HitinversionNext Hit structures: (1) deep faults that affected basement and synrift strata where preexisting faults were selectively reactivated during Previous HitinversionNext Hit based on their length and (2) shallow faults that affected postrift and syninversion strata. Normal faults formed at high angle to the reactivated half-graben bounding fault as a result of hanging-wall expansion and internal deformation as it accommodated the shape of the curved footwall during oblique Previous HitinversionNext Hit. Previous HitStructuralNext Hit restorations suggest that contraction during Previous HitinversionNext Hit was initially accommodated by folding and internal deformation of synrift sedimentary wedges, followed by displacement along half-graben bounding faults. We suspect that during late Previous HitinversionNext Hit, the weight of the overburden inhibited additional fault displacement and folding became the main shortening-accommodating mechanism. Natural examples described in this study exhibit significant along-strike variation in Previous HitstructuralNext Hit style and high Previous HitstructuralNext Hit complexity associated with relatively small amounts of Previous HitinversionNext Hit, which suggest the need for incorporating more complex deformation scenarios into analog models. Fault framework development and its linkage to a specific mechanism (e.g., hanging-wall deformation because of oblique Previous HitinversionNext Hit) enables the predictive analysis of subseismic faulting and fracture distribution, which can impact our understanding of the petroleum systems in the Neuquen Basin's northern embayment, especially regarding the significant fault development within the Cuyo Group, which may impact the Los Molles petroleum system.

Pay-Per-View Purchase Options

The article is available through a document delivery service. Explain these Purchase Options.

Protected Document: $10
Internal PDF Document: $14
Open PDF Document: $24

AAPG Member?

Please login with your Member username and password.

Members of AAPG receive access to the full AAPG Bulletin Archives as part of their membership. For more information, contact the AAPG Membership Department at [email protected].