Multiple metamorphic events revealed by zircons from the Diancang Shan−Ailao Shan metamorphic complex, southeastern Tibetan Plateau

Multiple partial melting events in the Ailao Shan–Red River and Gaoligong Shan complex belts, SE Tibetan Plateau: Zircon U–Pb dating of granitic leucosomes within migmatites

“…For this reason, the timing of partial melting in the ASRR and GS complex belts and the genetic relationships among metamorphic evolution, tectonic deformation and partial melting are still very poorly constrained (e.g. Schärer et al, 1990;Liu et al, 2012bLiu et al, , 2013. Here we present U-Pb ages for anatectic zircons preserved in granitic leucosomes within migmatites from both the ASRR and GS complex belts, where the spatial distributions of P-T conditions and high-strain shear zone have been well documented Tapponnier et al, 1990;Leloup et al, , 1995.…”

“…40 Ar/ 39 Ar dating of biotite and amphibole was carried out using a GV Instruments 5400 Ò mass spectrometer at the Guangzhou Institute of Geochemistry, Chinese Academy of Sciences. The analytical procedures followed those of described in Liu et al (2013), and are provided as a Supplemented data file 1.…”

Neoproterozoic subduction along the Ailaoshan zone, South China: Geochronological and geochemical evidence from amphibolite

“…1 and 12), with gabbro and granodiorite yielding U-Pb zircon ages of 769 ± 7 Ma and 761 ± 11 Ma and their geochemical composition suggesting a magmatic arc setting (e.g., Qi et al, 2012). Additionally, in the PoSen complex in northern Vietnam, which is inferred to lie along a further extension of the Ailaoshan suture zone (Hieu et al, 2009(Hieu et al, , 2012 Hieu et al, 2009Hieu et al, , 2012Lin et al, 2012;Liu et al, 2012;Wang et al, 2011a). The synthesis of all data suggests an overall age-range of the Neoproterozoic igneous activity within the Ailaoshan suture zone from at least 815 Ma to 750 Ma.…”

Provenance of Upper Miocene to Quaternary sediments in the Yinggehai-Song Hong Basin, South China Sea: Evidence from detrital zircon U–Pb ages

“…Numerous data of high-temperature shear and magmatism are available from the Red River Fault Zone which is located in the southern Yangtze Craton (Fig. 1A), and yield U-Pb ages between 20 and 60 Ma (Leloup et al, 1995;Zhang and Schärer, 1999;Liu et al, 2013).…”

“…8A) (Zhang and Schärer, 1999;Leloup et al, 2001;Gilley et al, 2003). The age range and extremely narrow distribution of grains are related to melting and exhumation triggered by motion on the Red River Fault Zone (Hoang et al, 2009;Liu et al, 2013). The Cenozoic zircon grains are only minor in the age structure, suggests that the Red River Fault Zone was not the major provenance contributor to the basin even though there was deep exhumation.…”