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Fault displacement profiles in multilayer systems: from fault restriction to fault propagation
Ist Teil von
Terra nova (Oxford, England), 2012-12, Vol.24 (6), p.499-504
Ort / Verlag
Oxford, UK: Blackwell Publishing Ltd
Erscheinungsjahr
2012
Link zum Volltext
Quelle
Wiley Online Library - AutoHoldings Journals
Beschreibungen/Notizen
Terra Nova, 24, 499–504, 2012
The distribution of displacement along faults is a key parameter in various areas of geology such as earthquake studies, three‐dimensional strain restoration, fault growth, and reservoir and seal strata relations in hydrocarbon systems. It is essential therefore to understand how local conditions govern displacement distribution. We analyse dip‐parallel displacement profiles of normal faults cutting five alternating limestone and shale layers and we discuss their evolution, from their nucleation to their restriction by lithological interfaces or bed‐parallel faults in clays, or to their further propagation through several layers. Local displacement gradients control the shape of displacement profiles and are highly variable over the course of fault history. Accordingly, the Dmax‐L relation is nonlinear. Bed‐parallel faults prove stronger restrictors than lithological interfaces and the correlation of the local gradient with lithology during restriction and propagation indicates that knowledge of these gradients is required if we are to understand how faults develop in multilayer systems.