Hinterland plateaux and Mediterranean-style back-arc basins both form behind active subduction zones or collisional megathrusts, and share many characteristics: (1) early crustal thickening to about twice normal continental thickness; (2) thin lithospheric mantle; (3) mixed magmatism including asthenospheric, lithospheric, and crustal melts; (4) late-stage horizontal extension accompanied by ve...

West Junggar is a key area for understanding intra-oceanic plate subduction and the final closure of Ocean. Knowledge Carboniferous tectonic evolution Ocean region required framework accretionary processes in Junggar, Central Asian Orogenic Belt. A series Early volcanic intrusive rocks, namely, basaltic andesite, dacite, diorite, occur Mayile southern northwestern China. Our new LA-ICPMS zircon...

Based on chemical composition and timing of late Paleogene Neogene igneous rocks in southern Patagonia, six suites are identified correlated with subduction processes during the approaching active oceanic ridges. magmatism took place after a period decreased sub-alkaline (LPg Suite). Early Miocene calc-alkaline mark reactivation acceleration (Suite 1). These located at ca. 200 km from trench ty...

Subduction-zone magmatism is triggered by the addition of H(2)O-rich slab-derived components: aqueous fluid, hydrous partial melts, or supercritical fluids from the subducting slab. Geochemical analyses of island arc basalts suggest two slab-derived signatures of a melt and a fluid. These two liquids unite to a supercritical fluid under pressure and temperature conditions beyond a critical endp...

Various evidence, including size and volume of the Siberian Traps, timing and duration of eruptions, paleotectonic and paleogeographic reconstructions, lithospheric structure, heat flow, trace element and radiogenic isotope compositions of lava are reviewed in this chapter. The major evidence may be summarized as follows. The Siberian Traps erupted in a number of brief volcanic events from the ...