Geochemistry, zircon U–Pb ages and Hf isotopes of the Paleozoic volcanic rocks in the northwestern Chinese Altai: Petrogenesis and tectonic implications

Provenance of Early Paleozoic metasediments in the central Chinese Altai: Implications for tectonic affinity of the Altai-Mongolia terrane in the Central Asian Orogenic Belt

“…The main zircon populations of the northern India Block have pre-Neoproterozoic age peaks at 2.55 and 1.77 Ga slightly older than those of the Tarim Craton, with more extensive Neoproterozoic magmatic records with peaks at 1178, 979 and 609 Ma (Decelles et al, 2004;Gehrels et al, 2006;Kaur et al, 2011;McKenzie et al, 2011;Ravikant et al, 2011). The age distribution of the South China Block is similar to that of the Tarim Craton, characterized by three age peaks at 2.48, 1.85 and 0.8 Ga (Wan et al, 2007;Wang et al, 2007Wang et al, , 2010bXu et al, 2007;Sun et al, 2009;Yu et al, 2010;Li et al, 2011).…”

“…Therefore, the metasediments of the Kulumuti Group were mainly derived from a near source dominated by Early Paleozoic arc-related rocks and a faraway source composed of Precambrian igneous rocks. Recent zircon U-Pb dating reveals that the magmatic rocks in the Chinese Altai mostly formed in the Paleozoic Jahn, 2004;Wang et al, 2006Wang et al, , 2010bBriggs et al, 2007;Tong et al, 2007;Yuan et al, 2007;Sun et al, 2008;Cai et al, 2011Cai et al, , 2012bLiu et al, 2012a). The oldest granitic pluton and felsic volcanic rock in the Chinese Altai ware considered to have formed at 479 Ma and 504 Ma, respectively Cai et al, 2011;Yang et al, 2011).…”

“…Comparing relative probability plots for detrital zircons from the Paleozoic metasediments in the Chinese Altai and detrital zircons from several other blocks. Original data are from the references: the Chinese Altai ; and data in this study), the North China Craton (Darby and Gehrels, 2006;Zhou et al, 2008;Wan et al, 2011;Liu et al, 2012bLiu et al, , 2013, the Siberia Craton (Khudoley et al, 2001;Wang et al, 2011;Gladkochub et al, 2013), the Tarim Craton Zhang et al, 2011Zhang et al, , 2012Zhu et al, 2011;Wang et al, 2013), the Yilgarn Craton (Cawood et al, 2003;Veevers et al, 2005;Pidgeon and Nemchin, 2006), the Gawler Craton (Swain et al, 2005;Belousova et al, 2009), the East Antarctica Block (Bisnath et al, 2006;Clark et al, 2012;Grew et al, 2012;Marschall et al, 2013), the northern India Block (Decelles et al, 2004;Gehrels et al, 2006;Kaur et al, 2011;McKenzie et al, 2011;Ravikant et al, 2011), and the South China Block (Wan et al, 2007;Wang et al, 2007Wang et al, , 2010bXu et al, 2007;Sun et al, 2009;Yu et al, 2010;Li et al, 2011). materials for the Early Paleozoic metasediments in the Chinese Altai. Therefore, we suggest that the Tarim Craton is most likely the main source of old detritus of the Early Paleozoic metasedimentary rocks in the Chinese Altai, which therefore suggests that the whole AltaiMongolia terrane has a close tectonic affinity to the Tarim Craton.…”

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

“…It is suggested that mantle-derived components or juvenile crust have played an important role in the generation of these granitoids in Central Asia Jahn et al, 2000Jahn et al, , 2004Sengör et al, 1993;Windley et al, 2007). Based on recent Hf and Nb isotopic studies, several important crustal growth events were proposed to have occurred in various parts of the CAOB during the Phanerozoic, namely at 280-306 Ma, 315-306 Ma and 345-463 Ma (Cai et al, , 2011Geng et al, 2009;Lei et al, 2011;Su et al, 2012;Sun et al, 2008;Tang et al, 2010bTang et al, , 2012aWang et al, 2011b;Xu et al, 2010;Yin et al, 2010Yin et al, , 2013Yuan et al, 2007;Zhang et al, 2012;and this study).…”

Geochemistry and Nd isotopic composition of the Early Paleozoic flysch sequence in the Chinese Altai, Central Asia: Evidence for a northward-derived mafic source and insight into Nd model ages in accretionary orogen

“…1) but little is known for the provenance and tectonic setting of the sequence, which is crucial to understand the crustal formation and tectonic evolution of the orogenic belt (Buslov et al, 2002;Chen and Jahn, 2002;Li et al, 2006;Long et al, 2007Long et al, , 2008Ota et al, 2007;Utsunomiya et al, 2009;Kröner et al, 2010b;Rojas-Agramonte et al, 2011). In the Chinese Altai, source composition and geochemical features of the flysch sequence have been poorly addressed (He et al, 1990;Chen and Jahn, 2002;Li et al, 2006;Long et al, 2007;Long et al, 2010), because previous studies in this orogen mostly focus on the age and petrogenesis of igneous rocks and are rarely related to the sedimentary sequence Xu et al, 2003;Zhang et al, 2003Zhang et al, , 2004Wang et al, 2006;Yuan et al, 2007;Sun et al, 2008;Wang et al, 2009;Cai et al, 2010;Wang et al, 2010).…”