Ediacaran to Cambrian oceanic rocks of the Gondwana margin and their tectonic interpretation

摘要: In tectonic maps of Variscan Europe, allochthonous pieces Cadomian basement clearly stand out with their predominant metabasic to ultrabasic elements, the so-called exotic terranes ophiolites. Most these domains are observed in basements Central Iberian Allochthone, South Armorican domain, nappe structures French Massif Central, Saxothuringian Zone and Bohemian Massif. Similar relics can be recognized many Alpine areas, correlations supposedly more autochthonous basements, such as Ossa Morena basement, envisaged. All thought represent interrupted trace a former continuous or discontinuous structure, characterized by presence ocean-derived proto-Rheic rock suites. These interpreted magmatic arcs Ediacaran Cambrian age accreted Gondwana margin, which later were scattered units during plate-tectonic processes. The similar suites Ordovician realm is explained accretion China-derived collision margin opening Rheic Ocean.