Geometry and tectonic significance of Albian sedimentary dykes in the Sisteron area,SE France |
| |
| Institution: | 1. Consiglio Nazionale delle Ricerche, IGAG, Rome, Italy;2. Dipartimento di Scienze, Università Roma Tre, Italy;3. ISTerre, Université Grenoble Alpes and CNRS, 38041 Grenoble, France;4. High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, Taipei, Taiwan ROC;5. Pamukkale University, Department of Geological Engineering, Denizli, Turkey;6. Geologisches Institut, ETH Zürich, Switzerland;7. Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budapest, Hungary;8. Liceo Scientifico Statale ‘L. Spallanzani’, Tivoli, Italy;1. Laboratoire GéoSciences, Université de La Réunion, Institut de Physique du Globe de Paris, UMR 7154, Sorbonne Paris Cité, CNRS, 97744 Saint Denis, France;2. Université de Lyon, Université Jean Monnet, UMR CNRS IRD 6524, Laboratoire Magmas et Volcans, F-42023 Saint Etienne, France;3. Geosciences Montpellier, CNRS UMR 5243, Université de Montpellier 2, Place Bataillon, 34095 Montpellier, cedex 5, France;1. Laboratoire Magmas et Volcans, Université Blaise Pascal – CNRS – IRD, OPGC, 5 rue Kessler, 63038 Clermont-Ferrand, France;2. Laboratoire GéoSciences Réunion, Université de La Réunion, Institut de Physique du Globe de Paris, UMR CNRS 7154, Sorbonne Paris Cité, 15 avenue René Cassin, 97715 Saint-Denis, France;3. Université de Lyon, Université Jean Monnet, 23 rue du Docteur Paul Michelon, 42023 Saint Etienne, France |
| |
| Abstract: | Sedimentary dykes in the Sisteron area have penetrated pre-existing fracture sets in late Aptian and early Albian strata. Dynamic characteristics of such fractures are revealed by the bifurcation and the branching of dykes. Three-dimensional statistical analysis of the initial orientation of two vertical conjugate sets of dykes indicates their mechanics of formation, as well as the principal compressional stress direction during the development of the sill-dyke regime in the Sisteron area. Another set of sandstone dykes present in the area suggests syn-sedimentary and extensional faulting tectonic activity before the area became involved in compressional tectonics. Several significant dyke-forms clearly show the sense of shear along fractures filled with sand, and enable the stress pattern during dyke formation in the area to be recognized. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
