About This Item
- Full TextFull Text(subscription required)
- Pay-Per-View PurchasePay-Per-View
Purchase Options Explain
Share This Item
Mencos, J., J. A. Munoz, and S. Hardy,
Three-dimensional Geometry and Forward Numerical Modeling of the Sant Corneli Anticline (Southern Pyrenees, Spain)
J. Mencos,1 J. A. Munoz,2 S. Hardy3
1Institut de Recerca GEOMODELS and GGAC (Grup de Geodinamica i Analisi de Conques), Departament Geodinamica i Geofisica, Universitat de Barcelona, Barcelona, Spain
2Institut de Recerca GEOMODELS and GGAC (Grup de Geodinamica i Analisi de Conques), Departament Geodinamica i Geofisica, Universitat de Barcelona, Barcelona, Spain
3ICREA (Institucio Catalana de Recerca i estudis Avaneats) and GGAC (Grup de Geodinamica i Analisi de Conques), Departament Geodinamica i Geofisica, Facultat de Geologia, Universitat de Barcelona, Barcelona, Spain
This work was conducted under the financial support of the Modelizacion Estructural 4-D project (CGL2007-66431-C02-01). Research by J. Mencos is funded by a predoctoral grant from the Ministerio de Ciencia e Innovacion (2004-1824). We wish to acknowledge Grup de Geodinamica i Analisi de Conques (2001SGR-000074). Part of the seismic interpretation used The Kingdom Suite software, which was generously provided by Seismic Micro-Technology via the University Gift Program. Midland Valley is acknowledged for providing 2DMove and 3DMove, which were used for part of the seismic interpretation and 3-D reconstruction and visualization. We also acknowledge Bentley Systems, Inc. for providing MicroStation, which was used for 3-D digitization and 3-D reconstruction. Part of the 3-D reconstruction process was performed using GOcad by Paradigm. P. Arbues and Servei Geologic de Catalunya are acknowledged for providing mapping information. The manuscript has been improved by the comments of Jurgen Adam, Massimo Bonora, and two anonymous reviewers.
This work is based on a three-dimensional (3-D) reconstruction methodology for geologic structures from field and subsurface data. The methodology consists of several steps: (1) collection and georeferencing of data, i.e., 3-D digitalization; (2) analysis of data and definition of a 3-D geometric and stratigraphic model, i.e., structural and stratigraphic analysis; and finally, (3) the reconstruction of key surfaces that form the structure, i.e., reconstruction of the reference surface and reconstruction of additional surfaces, both honoring the defined geometric model. The methodology has been applied to a natural example, the Sant Corneli anticline, a thrust-related fold located in the southern Pyrenees. This fold, oriented approximately east–west, has a complex 3-D geometry, with stratigraphic and structural variations, both laterally and vertically. This chapter focuses on the study of the Late Cretaceous postrift series. Outcrop information has been collected to reconstruct the superficial geometry of the Sant Corneli anticline. Seismic profiles that cross the area have been interpreted to reconstruct the geometry of the thrust fault at depth. The reconstruction methodology at surface and at depth is made following the same workflow, adapting it to the different nature of the original data sets. At the same time, the use of 3-D forward numerical modeling allows us to explore the relationship between the fold and the thrust, the main factors that influence fold development through space and time, and to find the kinematic model(s) that best fit the proposed 3-D reconstruction.
The main contribution of this work is the incorporation of forward modeling techniques in the 3-D reconstruction workflow to independently establish the relationship between the various reconstructed geologic surfaces. Once this relationship is known, it is possible to refine the reconstructed surfaces and integrate them in a single and comprehensive 3-D model that honors both the available data and the established kinematic model. This technique is also used to analyze the possible kinematic evolution of a fault-related structure that best reproduces the deformed geometry obtained through the 3-D reconstruction process. Moreover, this study also improves the developed 3-D reconstruction methodology as it incorporates the use of isopach maps.
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|