The "Bois du Peu" thrust sheets (external French Jura mountains):re-examining the concept of "Fault-Fold" - INSU - Institut national des sciences de l'Univers Access content directly
Preprints, Working Papers, ... Year : 2010

The "Bois du Peu" thrust sheets (external French Jura mountains):re-examining the concept of "Fault-Fold"

Abstract

Significant reconnaissance field work along a road project which crosses the site of the “Bois du Peu" thrust sheets (near Besançon, Eastern France), provides us the opportunity to re-examine the concept of “fault-folding" (in french, “faille-pli”) which was introduced by Glangeaud (1944) to account for the observed tectonics of the Jura mountains and, more specifically, external Jura. From a theoretical point of view, we contend that this concept is incompatible with general principles of balanced cross-sections and has to be rejected. We show that in the “Bois de Peu" area, data fit with a deformation model which associates several modes of folding (fault-propagation fold and fault-bend fold). The decollement level related to these folds is located into Keuper strata, Oxfordian-Argovian levels being used locally as a secondary decollement level.
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Dates and versions

insu-00442191 , version 1 (18-12-2009)
insu-00442191 , version 2 (04-10-2010)

Identifiers

  • HAL Id : insu-00442191 , version 1

Cite

Grégory Bièvre, Eric Mercier. The "Bois du Peu" thrust sheets (external French Jura mountains):re-examining the concept of "Fault-Fold". 2010. ⟨insu-00442191v1⟩
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