Geochronology and geochemistry of basaltic rocks from the Sartuohai ophiolitic mélange, NW China: Implications for a Devonian mantle plume within the Junggar Ocean

Geodynamics of oceanic plateau and plume head accretion and their role in Phanerozoic orogenic systems of China

“…For example the Central Asian Orogen is characterised by Devonian to Permian ophiolite complexes that display diverse geochemical associations characterised by calcalkaline, OIB, MORB, boninite and adakite magmas (e.g. Wong et al, 2010;Yang et al, 2012). Specific examples include the Sartuohai ophiolitic mélange ( Fig.…”

“…Specific examples include the Sartuohai ophiolitic mélange ( Fig. 1) with its plume-type geochemical affinity, which was accreted onto eastern West Junggar Craton during closure of the Junggar Ocean (Yang et al, 2012). Other ophiolite mélanges have been interpreted in the context of ridge subduction and slab windowing because of their adakite signatures (Zhang et al, 2008;Wong et al, 2010).…”

“…These OIB terranes are interpreted as far-travelled oceanic plateaus. However, in the central Asian Orogen, there are several Devonian to Permian ophiolite complexes characterised by diverse geochemical associations that include calc-alkaline, OIB, MORB, bonnanite and adakite terranes (e.g., Wong et al, 2010;Yang et al, 2012). Several of these terrane contain ophiolites that are similar in age to, or slightly older than, their inferred timing of accretion.…”

Spatial–temporal framework for the closure of the Junggar Ocean in central Asia: New SIMS zircon U–Pb ages of the ophiolitic mélange and collisional igneous rocks in the Zhifang area, East Junggar

“…1a), is one of the important tectonic units in the evaluation and examination of the greatest continental accretion on earth (Briggs et al, 2007;Xiao et al, 2008Xiao et al, , 2010Choulet et al, 2011Choulet et al, , 2012cWu et al, 2012;Yang et al, 2012c;Chen et al, 2015;Zhu et al, 2015). However, the tectonic property and closure time of the Junggar Ocean are controversial.…”

Organofacies and paleoenvironment of lower Carboniferous mudstones (Dishuiquan Formation) in Eastern Junggar, NW China

“…The basin contains a large accumulation of Paleozoic volcanic and clastic sedimentary rocks, which record the history of Paleo-Asian ocean closure and the accretionary orogenesis (He et al, 2010;Xiao et al, 2013). Numerous studies have examined the geochemistry and chronology of the volcanic rocks from the Eastern Junggar Basin and the CAOB, and a widely accepted model relates Paleo-Asian ocean subduction with continental accretion during the later Paleozoic, which is constrained by the timing of ocean closure, collision and post-collision volcanic events (Han et al, 2011;Li et al, 2014;Liu et al, 2013;Yang et al, 2012a). However, few data concerning the sedimentary facies and environmental evolution of the Carboniferous sedimentary rocks along the subduction of the Paleo-Asian Ocean are available due to the intense volcanic activity and differential uplift following the early Carboniferous.…”