Garnet amphibolites from the Ganzi–Litang fault zone, eastern Tibetan Plateau: mineralogy, geochemistry, and implications for evolution of the eastern Palaeo-Tethys Realm

Mid-cretaceous rapid denudation of Eastern Tibetan plateau: Insights from detrital records at the Southwestern corner of Sichuan basin

“…It is possible to compare potential source compositions to the detrital ones because the potential source rocks were already narrowed down to particular regions based on other provenance proxies and because many of these rocks are still preserved in the western provenance of the basin today. For comparison we used data from published source rocks data from different units including Triassic flysch from the southern Songpan-Ganzi (Zhang et al, 2008), Early and Middle Triassic sandstones in the West Qinling (Yan et al, 2014), Triassic granite within the Ganzi-Litang suture zone (Li et al, 2017), Metamorphic crystalline basement of Yidun terrane , Metamorphic massifs in Longmenshan orogenic belt (He et al, 1988), Metamorphic rocks in Danba area of the southeast corner of Tibetan Plateau (Huang et al, 2003;Billerot et al, 2017), and garnet from modern river sands in the upper Reaches of the Yangtze River (Wang et al, 2018).…”

“…FIGURE 12The G-P-AS triangular diagram(Mange and Morton, 2007) of garnet geochemistry from literature. Garnet geochemistry data form the Triassic flysch from the southern Songpan-Ganzi(Zhang et al, 2008), Early and Middle Triassic sandstones in the West Qinling(Yan et al, 2014), Triassic granite of the Ganzi-Litang suture zone(Li et al, 2017), Metamorphic crystalline basement of Yidun Terrane, Metamorphic massifs in Longmenshan orogenic belt(He et al, 1988), Metamorphic rocks in Danba area of the southeast corner of Tibetan Plateau(Huang et al, 2003;Billerot et al, 2017), and garnet from modern river sands in the upper Reaches of the Yangtze River(Wang et al, 2018).…”