Carboniferous–Permian extensive magmatism in the West Junggar, Xinjiang, northwestern China: its geochemistry, geochronology, and petrogenesis

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

“…By combining the ages of the syn-collisional West Hill quartz diorite (348 Ma) and Hongliuxia ductile shear zone (344 Ma), it is suggested that Junggar Ocean was closed before 343-329 Ma in the Early Carboniferous and the closure is possibly scissors-like from the Zhifang-Kalamaili area in the eastern segment to the Darbute-Karamay area in the western segment. (Zhang et al, 2006a;Geng et al, 2009;Tang et al, 2010), which were interpreted as products of slab or ridge subduction at island arc setting by some researchers (e.g., Zhang et al, 2006a;Shen et al, 2009Shen et al, , 2010Shen et al, , 2012bShen et al, , 2014Geng et al, 2009Geng et al, , 2011Tang et al, 2010Tang et al, , 2012bGao et al, 2013Gao et al, , 2014. However, igneous rocks with arc geochemical signatures may be formed in late-and post-collision settings as well (Harris et al, 1986;Chung et al, 2005;Guo et al, 2005;Mo et al, 2008 porphyry district (Cao et al, 2014aWu et al, 2015).…”

Late-Paleozoic emplacement and Meso-Cenozoic reactivation of the southern Kazakhstan granitoid basement

“…This subduction zone was responsible for the formation of an extensive Late Devonianearly Permian magmatic belt, of which remnants can be found in East Kazakhstan, West Junggar and the Chinese northern Tien Shan Choulet et al, 2011Choulet et al, , 2012Choulet et al, , 2013Filippova et al, 2001;Kröner et al, 2008;Tang et al, 2010;Wilhem et al, 2012;Windley et al, 2007;Xiao et al, 2010Xiao et al, , 2013Zhao and He, 2013). In the Chinese West Junggar, most late Paleozoic plutons range in age from 360 to 280 Ma (with a peak between 340 and 300 Ma) based on zircon U-Pb ages from Gao et al (2014), Guo et al (2010), Han et al (2006), Li et al (2014), Tang et al (2010), Wei et al (2011) and Zhu et al (2007). In that region, calc-alkaline arc magmatism (characterized mainly by I-type granites) dominated around~380-305 Ma (e.g.…”

“…In that region, calc-alkaline arc magmatism (characterized mainly by I-type granites) dominated around~380-305 Ma (e.g. Choulet et al, 2011Choulet et al, , 2012Choulet et al, , 2013G. Yang et al, 2014;Geng et al, 2011;Shen et al, 2013b;Tang et al, 2010;Yin et al, 2010Yin et al, , 2013Zhou et al, 2008).…”

“…Wang et al, 2009). In the Chinese West Junggar, transition from a Carboniferous subductionaccretion setting to a Permian post-accretion setting transpired around 305-300 Ma (Choulet et al, 2012(Choulet et al, , 2013Gao et al, 2014;Geng et al, 2009Geng et al, , 2011Tang et al, 2010;Yin et al, 2013;Zhou et al, 2008). Between~300-250 Ma, alkaline magmatism and A-type granites dominated with minor calc-alkaline and I-type granites in an overall post-collisional setting with major strike-slip deformation and associated extensional-transtensional tectonics (Chen and Jahn, 2004;Choulet et al, 2011Choulet et al, , 2012Choulet et al, , 2013Tang et al, 2010;Zhang et al, 2008;Zhou et al, 2008).…”

Permian large igneous provinces: Characteristics, mineralization and paleo-environment effects

“…They also evaluated the Ni-Cu mineralization potential of these intrusions. Gao et al (2014) presented petrological, geochronological, and geochemical data for I-type and A-type granites from West Junggar, which were emplaced at 348-319 Ma and 321-290 Ma, respectively. They interpreted the early Carboniferous I-type granites the products of re melting of trapped oceanic crust due to underplated mantle wedge-derived basaltic magma.…”