The geochronology of metasediments incorporated to orogenic wedges provides an important key in understanding the early evolution collisional systems. This study reveals timing Variscan processes Saxothuringian wedge, reflecting transition from oceanic continental subduction and collision. In situ monazite U-Pb Rare Earth Elements (REE) geochemistry were performed Erzgebirge Crystalline Complex...

Abstract The Mesoproterozoic MARA terrane of western South America is a composite igneous-metamorphic complex that important for Paleozoic paleogeographic reconstructions and the relative positions Laurentia Gondwana. magmatic detrital records are consistent with Laurentian origin; however, metamorphic deformation lack sufficient detail to constrain correlation units within timing mechanisms ac...

Plate convergence can induce large-scale metamorphism and magmatism, reshape large parts of continental margins, subsequently change regional climate biodiversity. Metamorphic rocks in orogenic belts commonly record different metamorphic evolutions temporal-spatial distributions at the scale, which are strongly influenced by convergent processes through time. In some cases, ultrahigh-pressure (...

introduction the area studied is located north of azna (lorestan province) in a small portion of the sanandaj – sirjan structural zone (mohajjel et al., 2003).this area is part of the zagros orogenic belt, formed by the opening and closure of neotethyan ocean. from ne to sw, it consists of three parallel tectonic regions: the orumieh-dokhtar magmatic belt, the sanandaj-sirjan structural zone an...

Deformation processes related to early stages of collisional belts, especially the inversion rifted systems remain poorly constrained, partly because evidence these is usually obliterated during subsequent collision. The Pyrenean belt resulting from a Cretaceous hyperextended margin associated with high-temperature and low-pressure metamorphism in Internal Metamorphic Zone (IMZ), good example f...

Abstract The Seve Nappe Complex (SNC) comprises continental rocks of Baltica that were subducted and exhumed during the Caledonian orogeny prior to collision with Laurentia. tectonic history central SNC is investigated by applying in-situ zircon monazite (Th-)U–Pb geochronology trace element analysis (ultra-)high pressure (UHP) paragneisses in Avardo Marsfjället gneisses. Zircons Gneiss exposed...