Discovery of an adakite-like pluton near Dongqiyishan (Beishan, NW China) — Its age and tectonic significance

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.…”

Recognition of a Devonian‐early Mississippian plutonic belt in the eastern Beishan area, Northwest China, and its tectonic implications

“…In this study, the geochronology and geochemistry of one intermediate pluton and two granitic plutons from a magmatic belt between the MSX and HNX ophiolitic belts (Figure c) are investigated to determine their ages and petrogenesis. These data are then integrated with previous studies of Late Paleozoic granites in the region (Zhang et al, ; Zheng et al, ) in order to constrain the tectonic evolution of the eastern Beishan area and the closure of the Paleo‐Asian Ocean. We document for the first time a Devonian‐early Mississippian Late Paleozoic granitic belt in the eastern Beishan area, which allows us to develop a new Late Paleozoic tectonic scenario for the evolution of the Beishan area in the Central Asia Orogenic Belt.…”

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.…”