Geochemistry of the ~430-Ma Jingbulake mafic–ultramafic intrusion in Western Xinjiang, NW China: Implications for subduction related magmatism in the South Tianshan orogenic belt

Geochemistry, zircon U–Pb ages and Lu–Hf isotopes of early Paleozoic plutons in the northwestern Chinese Tianshan: Petrogenesis and geological implications

“…In the northern part of the NYGB, arcrelated early Paleozoic granitoids were described in the Wenquan area and yielded zircon U-Pb ages of 466-447 Ma Wang et al, 2012). Similar granitoids in the SYGB and CTGB provided zircon U-Pb ages of 523-424 Ma and 479-416 Ma, respectively (Gao et al, 2009b;Han et al, 2004;Li, 2011a;Long et al, 2007b;Qian et al, 2009;Shi et al, 2007;XBGMR, 1993;Xu et al, 2010;Yang and Zhou, 2009;Yang et al, 2006;Zhu et al, 2006). In addition, several early Paleozoic magmatic belts have recently been documented in neighboring regions such as the Kyrgyz northern Tianshan (470-472 Ma) and the East Kyrgyz Range (449-451 Ma) (Kröner et al, 2012), the Kyrgstan Northern Tianshan (441-461 Ma) (Kröner et al, in press, 2013b), as well as the Chun-Yili Mountain (475-508 Ma) (Alexeiev et al, 2011).…”

“…Early Paleozoic granitoids intruding into the Precambrian rocks mostly occur in the NYGB to the CTGB. For example, granitoids collected from the Wenquan area in the northern part of the NYGB yielded zircon ages of 447 Ma to 466 Ma Wang et al, 2012), whereas granitoids in the SYGB yielded ages between 426 Ma and 523 Ma (Li, 2011a;Long et al, 2007b;Qian et al, 2009;XBGMR, 1993;Xu et al, 2010;Yang and Zhou, 2009;Zhu et al, 2006). In the CTGB, granitoids yielded zircon ages of 416 Ma to 479 Ma (Gao et al, 2009b;Han et al, 2004;Li, 2011a;Long et al, 2007b;Shi et al, 2007;Xu et al, 2006bXu et al, , 2010Yang et al, 2006).…”

Paleozoic tectonics of the southern Chinese Tianshan: Insights from structural, chronological and geochemical studies of the Heiyingshan ophiolitic mélange (NW China)

“…The magmatic arc comprises Late Devonian to Carboniferous shallow marine and terrigenous sedimentary rocks, calc-alkaline volcanic rocks and I-type granites (370-308 Ma) (e.g., XBGMR, 1993;Zhu et al, 2005Zhu et al, , 2006aZhu et al, , 2006bWang et al, 2006Wang et al, , 2007aWang et al, , 2007bXu et al, 2006;Gao et al, 2009 Ma) intrusive rocks occur along the Nalati Fault (Zhu et al, 2006c;Konopelko et al, 2008;Gao et al, 2009;Yang and Zhou, 2009). In the Yili area, a Precambrian metamorphic complex occurs beneath the arc series and is composed of Neoproterozoic gneissic granites, a series of presumed Mesoproterozoic metasedimentary rocks, and a presumed Paleoproterozoic crystalline basement (e.g., XBGMR, 1993;Allen et al, 1993;Gao et al, 1998;Hu et al, 2006).…”

Distribution and erosion of the Paleozoic tectonic unconformities in the Tarim Basin, Northwest China: Significance for the evolution of paleo-uplifts and tectonic geography during deformation

“…It is generally considered that the South Tianshan orogenic belt formed during the late Paleozoic (Carroll et al, 1990;Sengor, 1993;Ma et al, 2007), but the closure time and the polarity of subduction of the South Tianshan Ocean remains controversial. Many studies show that the South Tianshan Ocean was eventually closed, as a result of the collision of the Tarim and the Yili-Central Tianshan blocks during the Late Devonian to Early Carboniferous (e.g., Xia et al, 2004;Zhu et al, 2008;Allen et al, 1992;Gao et al, 1998Gao et al, , 2006Gao et al, , 2009Gao and Klemd, 2003;Han et al, 2004;Charvet et al, 2007Charvet et al, , 2011Solomovich, 2007;Wang et al, 2007;Jong et al, 2009;Li et al, 2008;Yang and Mei, 2009), but it is also argued that the final collision occurred in the Triassic (e.g., Zhang et al, 2007a,b;Li et al, 2002;Xiao et al, 2008). As to the polarity of subduction, many studies suggested that the South Tianshan ocean (back-arc basin) was closed by southward subduction during the Late Devonian-Early Carboniferous (Jiang et al, 2001;Wang et al, 2008;Charvet et al, 2011), whereas some studies proposed that the ocean subducted northward beneath the southern margin of the Kazakhstan-Yili plate (Windley et al, 1990;Allen et al, 1992;Gao et al, 1998Gao et al, , 2009Gao and Klemd, 2003;Zhu et al, 2009).…”