Growth strata geometry has been recognised as a valuable tool for inferring folding mechanism at shallow structural levels. Syntectonic sediments, in fact, passively record the progressive geometric evolution of their substratum (pre-growth strata). Wedge-like geometries (growth wedges) typically develop in thrust-related folds involving limb rotation. Conversely, folds developed by kink-band migration, are characterised by growth strata patterns consisting of uniformly dipping rock panels. A direct relation exists between the kinematics of thrust-related fold evolution and the distribution of deformational features in the folds themselves. The dependence of both growth strata geometry and deformation pattern from fault-fold kinematics, allows to establish a direct link between them. In particular, growth strata pattern are commonly preserved in non erosional environments, either extensional or compressional, and can provide a very useful tool for predicting the distribution of deformational features in structures imaged in reflections seismic profiles. The same concept holds in three dimensions when 3D seismic datasets are available.In this contribution, we illustrate the sensitivity of deformation patterns to growth stratal architectures in fault-related folds. For this purpose, we use the HCA numerical modelling technique, that allows forward modelling of fault-fold structures and related deformation patterns under erosional/depositional conditions.

Tavani, S., Storti, F., Salvini, F. (2004). Growth strata architectures as a tool for predicting fracture patterns in fault-related folds imaged in reflection seismic profiles..

Growth strata architectures as a tool for predicting fracture patterns in fault-related folds imaged in reflection seismic profiles.

TAVANI, STEFANO;STORTI, Fabrizio;SALVINI, Francesco
2004-01-01

Abstract

Growth strata geometry has been recognised as a valuable tool for inferring folding mechanism at shallow structural levels. Syntectonic sediments, in fact, passively record the progressive geometric evolution of their substratum (pre-growth strata). Wedge-like geometries (growth wedges) typically develop in thrust-related folds involving limb rotation. Conversely, folds developed by kink-band migration, are characterised by growth strata patterns consisting of uniformly dipping rock panels. A direct relation exists between the kinematics of thrust-related fold evolution and the distribution of deformational features in the folds themselves. The dependence of both growth strata geometry and deformation pattern from fault-fold kinematics, allows to establish a direct link between them. In particular, growth strata pattern are commonly preserved in non erosional environments, either extensional or compressional, and can provide a very useful tool for predicting the distribution of deformational features in structures imaged in reflections seismic profiles. The same concept holds in three dimensions when 3D seismic datasets are available.In this contribution, we illustrate the sensitivity of deformation patterns to growth stratal architectures in fault-related folds. For this purpose, we use the HCA numerical modelling technique, that allows forward modelling of fault-fold structures and related deformation patterns under erosional/depositional conditions.
2004
Tavani, S., Storti, F., Salvini, F. (2004). Growth strata architectures as a tool for predicting fracture patterns in fault-related folds imaged in reflection seismic profiles..
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/272844
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