The igneous rocks of Greece: The anatomy of an orogen

Abstract

The Hellenide orogen in Greece is part of the AlpineHimalaya mountian belt, created during the destruction of Tethys by the convergence of Gondwana and Eurasia. Within Greece, there is the record of a complete Wilson tectonic cycle of continental rifting, sea-fl oor spreading, plate subduction, and continental collision during Mesozoic and Cenozoic time. This book presents a new synthesis of the geological history of Greece as revealed by the varied igneous rocks. It is based on more than 30 years of fi eld and laboratory studies by the authors together with a synthesis of the widely scattered published literature that has been written in many different languagues. Basement rocks record Hercynian subduction and plutonism on the northern margin of Gondwana, which in the Permian and Triassic rifted into several microcontinents, thereby creating the eastern Mediterranean Neotethys ocean. Partial closure of strands of the Neotethys ocean resulted in widespread emplacement of Jurassic and Cretaceous ophiolites. Early Tertiary collision produced a Hellenide mountian chain similar to the Alps and Himalayas. Rapid Neogene extension of the Hellenides behind the modern South Aegean arc has formed the Aegean Sea, triggered widespread backarc igneous activity, and unroofed mid-crustal rocks. The geological setting, geochemistry, and tectonic signifi cance of each group of rocks is presented in detail, with numerous original maps and fi gures.