Tectonic models for accretion of the Central Asian Orogenic Belt

Abstract

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Late Paleozoic paleogeographic reconstruction of Western Central Asia based upon paleomagnetic data and its geodynamic implications

“…Late Carboniferous-Early Permian (between 320 and 280; Fig. 11b) At this time, only a remnant part of the Junggar Ocean was still in subduction in the inner part of the orocline (Windley et al, 2007). The closure of the basin was accommodated by internal deformation of the orocline and by the development of strike slip faults with dextral kinematics in Tian Shan (Laurent-Charvet et al, 2002, 2003Wang et al;2007) and Kazakhstan (Samugyn, 1974) (Fig.…”

“…Alternative models with multiple subductions of several oceanic basins, island arcs and microcontinents, widely distributed in time and space, similar to the present setting of Southwest Pacific, have been proposed (Xiao et al, 2004;Windley et al, 2007).…”

Metasomatized lithosphere–asthenosphere interaction during slab roll-back: Evidence from Late Carboniferous gabbros in the Luotuogou area, Central Tianshan

“…1a). It is a major part of the southwestern Central Asian Orogenic Belt (CAOB) Sengör et al, 1993;Windley et al, 2007;Xiao et al, 2004). It mainly consists of microcontinents, ophiolite and mélange belts, continental island arcs, and remnant seamounts and oceanic plateaus, accreted together between the Neoproterozoic and late Paleozoic (Gao et al, 1998;Xiao et al, 2008).…”

Confirmation of ultrahigh-temperature metapelitic granulite in the Altay orogen and its geological significance

“…The greenschist-amphibolite facies metamorphism was thought to have occurred in the late Devonian (*365 Ma) [11,15], probably associated with the arc-continent collision during the early to middle Palaeozoic [11,19]. Other researchers further consider that the low-pressure high-temperature metamorphism occurred in the period of 380-390 Ma, and was associated with the development of ridge-subduction and slab-window formation [20][21][22]. In addition, the granulite facies high-temperature metamorphism of this belt was considered to have occurred in the Permian (270-290 Ma) [17,18], reflecting that the region experienced an important phase of high-grade structural metamorphic event in the late Palaeozoic [23,24].…”