Neoproterozoic Subduction and Rifting on the Northern Margin of the yangtze Plate, China: Implications for Rodinia Reconstruction

Geochemistry and zircon ages of mafic dikes in the South Qinling, central China: evidence for late Neoproterozoic continental rifting in the northern Yangtze block

“…SIMS zircon U-Pb data of this study constrain the emplacement time of the mafic dikes at ca. 650 Ma, which is contemporaneous with the cycle 3 magmatism in the Yaolinghe Group (Yan et al 2004;Xue et al 2011;Wang et al 2013). Hence, the mafic dikes in the South Qinling belong to the youngest magmatic cycle (~680-650 Ma) in the South Qinling.…”

Where was the Ailaoshan Ocean and when did it open: A perspective based on detrital zircon U–Pb age and Hf isotope evidence

“…In addition, many Neoproterozoic felsic to mafic plutons have also been reported in the Hannan region along the northern margin of the Yangtze Block (Fig. 1) (Zhou et al, 2002b;Yan et al, 2004;Wang et al, 2008;Pei et al, 2009;Zhao and Zhou, 2009;Zhao et al, 2010;Dong et al, 2011Dong et al, , 2012Zhao et al, 2013). However, there is no Neoproterozoic magmatism has been reported within the Indochina-Simao Block.…”

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

“…The position of South China Craton (SCC) has played a key role in paleogeographic models for assembly of Precambrian supercontinents and contrasting intracratonic and peripheral locations have been proposed (e.g., Cawood et al, 2013;Li et al, 1995Li et al, , 2008aYan et al, 2004;Zhao and Cawood, 1999;Zhao and Guo, 2012;Zhou et al, 2002a). Key to resolving this controversy is to understand the tectonic setting of Neoproterozoic igneous rocks within the SCC, and whether they formed in supra-subduction zone and/or within-plate environments.…”