Geochronology, petrogenesis and tectonic implications of Triassic granitoids from Beishan, NW China

Ages and tectonic implications of Neoproterozoic ortho- and paragneisses in the Beishan Orogenic Belt, China

“…The zircon T C DM ages of the Phanerozoic igneous rocks range from 545 Ma to 1901 Ma with a peak of 1500-900 Ma (Figs. 12b and 13b), consistent with their whole-rock Sm-Nd isotope model ages of 1530-817 Ma (Liu et al, 2006a(Liu et al, , 2010Zhao et al, 2007;Li et al, 2009Li et al, , 2011Li et al, , 2012Li et al, , 2013Wang et al, 2009;Zhang et al, 2011Zhang et al, , 2012bFeng et al, 2012;Mao et al, 2012a;Song et al, 2013a,b). The 900-870 Ma Gubaoquan granitoid gneisses possessing T C DM ages of 1.85-1.44 Ga, can serve as old crustal source material for these Phanerozoic igneous rocks (Fig.…”

“…The 900-870 Ma Gubaoquan granitoid gneisses possessing T C DM ages of 1.85-1.44 Ga, can serve as old crustal source material for these Phanerozoic igneous rocks (Fig. 12b), while the involvement of mantle-derived juvenile material is inevitable based on as young as Cambrian model ages and strongly positive ε Hf (t) values of zircons from some Phanerozoic igneous rocks (Feng et al, 2012;Li et al, 2012Li et al, , 2013Mao et al, 2012a;Zhang et al, 2010bZhang et al, , 2011Zhang et al, , 2012b (Wright, 1969); (b) A/CNK-A/NK diagram (Maniar and Piccoli, 1989); c) FeO t /(FeO t + MgO)-SiO2 diagram (after Frost et al, 2001Frost et al, ). et al, 2009Liu et al, 2010;Song et al, 2013a,b;Tian et al, 2013Tian et al, , 2014.…”

Geochemical and geochronological evidence for a former early Neoproterozoic microcontinent in the South Beishan Orogenic Belt, southernmost Central Asian Orogenic Belt

“…Several former geological and geochronological studies mainly focused on the Paleozoic rocks of the SBOB (Ao et al, 2012;Li et al, 2012;Zhang et al, 2011Zhang et al, , 2012b. In comparison with the geochronologically well-constraint Precambrian crystalline basements of the adjacent CTA, the Dunhuang Block and the Tarim Craton (e.g.…”

Polyphase deformation of a Paleozoic forearc–arc complex in the Beishan orogen, NW China

“…TC, Tarim Craton; NCC, North China Craton; SCC, South China Craton; (b), simplified tectonic map of the southern and eastern Altaids with Fig. 2 outlined (Xiao et al, 2009a of the Beishan orogenic collage Li et al, 2012;Mao et al, 2012a;Qu et al, 2011;Song et al, 2013aSong et al, , 2013cXiao et al, 2010;Y. Zhang et al, 2011;Zhang et al, 2012a).…”