Mise en île de Porquerolles (Var, France) et ses implications sur la tectonique du massif des Maures au Palïque supérieur
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- 作者：Bellot ; Jean-Philippe
- 关键词：Provence ; î ; le de Porquerolles ; chaî ; ne Varisque ; dé ; crochement ; pli ; Maures ; France ; Provencal area ; Porquerolles island ; Variscan belt ; strike-slip fault ; fold ; Maures ; France
- 刊名：Comptes Rendus Geoscience
- 出版年：2004
- 出版时间：January, 2004
- 年：2004
- 卷：336
- 期：1
- 页码：67-74
- 全文大小：754 K
文摘
A new geological map of the Palaeozoic units from the Porquerolles Island provides evidence for two main units joined along a north–south-trending shear zone: a western unit of schist, sandstone and microconglomerates, an eastern unit of schist including calcareous rocks, metabasite and various types of mineralisations. The shear zone has experienced a main strike-slip, sinistral movement in a ductile regime, and a late westward normal movement from ductile to brittle regimes. It crosscuts an early thrust fault, marked by penetrative syn-metamorphic deformation and the abundance of quartz rods. According to geometrical relationships, the regional conic fold is interpreted as a large-scale dragging of foliation related to strike-slip faulting. Combined folding and wrenching point out a main transpressional tectonics related to the continental collision dated Middle Visean in the central and eastern parts of the Variscan Maures massif. To cite this article: J.-P. Bellot, C. R. Geoscience 336 (2004).