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AAPG Bulletin, Preliminary version published online Ahead of Print 15 September 2022.

Copyright © 2022. The American Association of Petroleum Geologists. All rights reserved.

DOI:10.1306/08072221188

Analog modeling of domino-style extensional basement fault systems with pre-kinematic salt

O. Ferrer1 , E. Carola1 , K. McClay23 , and N. Bufaliza4

1 Institut de Recerca Geomodels, Departament de Dinàmica de la Terra i de l´Oceà, Facultat de Ciències de la Terra, Universitat de Barcelona, C/ Martí i Franquès s/n, 08028 Barcelona, Spain
2 Australian School of Petroleum and Energy Resources, University of Adelaide, South Australia, 5005 Australia
3 Earth Sciences Department, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK
4 Center for Rock and Fluid Multiphysics, Colorado School of Mines, 1500 Illinois St., Golden, CO, 80401, USA

Ahead of Print Abstract

A systematic analog modeling program of domino-like basement extensional faults with a pre-kinematic decoupling layer is presented. Extension, acting at the basement level, is decoupled from the overburden by salt causing the development of monocline folds above basement-faults, salt-detached syncline basins, and grabens or diapirs at the upper monocline hinges. We investigate how different factors such as the thickness of pre-kinematic salt and sediments, the presence of a single or multiple layers of salt, and the sedimentation rate during extension control the evolution of salt-influenced sedimentary basins. The results show how by interpreting both, the sedimentary geometries and the location and migration of the depocenters, it is possible to understand the location of the main basement faults within the area as well as to constrain the processes and evolution of the basin (e.g., welding, active faulting, timing, etc.). Finally, comparison of analog models with natural examples provides insights on how structures reported by several authors relate to the kinematic evolution of extensional faults with a decoupling layer and how by interpreting the structures and geometries within the basin helps constraining the different stages of basin development.

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Please cite this AAPG Bulletin Ahead of Print article as:

O. Ferrer , E. Carola , K. McClay , N. Bufaliza: Analog modeling of domino-style extensional basement fault systems with pre-kinematic salt, (in press; preliminary version published online Ahead of Print 15 September 2022: AAPG Bulletin, DOI:10.1306/08072221188.

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