Skip to Main Content
Book Chapter

The brittle and ductile components of displacement along fault zones

By
C. Homberg
C. Homberg
1
Sorbonne Universités, UPMC Université Paris 06, UMR 7193, Institut des Sciences de la Terre de Paris (ISTeP), F-75005, Paris, France
2
CNRS, UMR 7193, Institut des Sciences de la Terre de Paris (ISTeP), F-75005, Paris, France
Search for other works by this author on:
J. Schnyder
J. Schnyder
1
Sorbonne Universités, UPMC Université Paris 06, UMR 7193, Institut des Sciences de la Terre de Paris (ISTeP), F-75005, Paris, France
2
CNRS, UMR 7193, Institut des Sciences de la Terre de Paris (ISTeP), F-75005, Paris, France
Search for other works by this author on:
V. Roche
V. Roche
3
Fault Analysis Group, School of Earth Sciences, University College of Dublin, Dublin, Ireland
Search for other works by this author on:
V. Leonardi
V. Leonardi
4
HSM Montpellier, UMR 5569, Université de Montpellier, CC57, 34090 Montpellier, France
Search for other works by this author on:
M. Benzaggagh
M. Benzaggagh
5
University Moulay Ismail, Faculty of Sciences, BP 11.201, Jbabra, Zitoune, Meknès, Morocco
Search for other works by this author on:
Published:
January 01, 2017

Abstract:

The total offset across a fault zone may include offsets by discontinuous faulting as well as continuous deformation, including fault-related folding. This study investigates the relationships between these two components during fault growth. We established conceptual models for the distributions of displacement due to faulting (i.e. brittle component or near-field displacement), to folding (i.e. ductile component) and to the sum of both (i.e. far-field displacement) for different mechanisms of fault-related folding. We then compared these theoretical displacement profiles with those measured along mesoscale normal faults cutting carbonate-rich sequences in the Southeast Mesozoic sedimentary basin of France. The near-field and far-field displacement profiles follow either a flat-topped or a triangular shape. Several fold mechanisms were recognized, sometimes occurring together along the same fault and represent either fault-propagation folds, shear folds or coherent drag folds. In the last case, local deficit in the fault slip is balanced by folding so that the brittle and ductile components compose together a coherent fault zone. Common characteristics of these faults are a high folding component that can reach up to 75% of the total fault throw, a high displacement gradient (up to 0.5) and a strong fault sinuosity.

You do not currently have access to this article.

Figures & Tables

Contents

Geological Society, London, Special Publications

The Geometry and Growth of Normal Faults

C. Childs
C. Childs
University College Dublin, Ireland
Search for other works by this author on:
R. E. Holdsworth
R. E. Holdsworth
University of Durham, UK
Search for other works by this author on:
C. A.-L. Jackson
C. A.-L. Jackson
Imperial College, UK
Search for other works by this author on:
T. Manzocchi
T. Manzocchi
University College Dublin, Ireland
Search for other works by this author on:
J. J. Walsh
J. J. Walsh
University College Dublin, Ireland
Search for other works by this author on:
G. Yielding
G. Yielding
Badley Geoscience Ltd, UK
Search for other works by this author on:
Geological Society of London
Volume
439
ISBN electronic:
9781862399716
Publication date:
January 01, 2017

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal