Zircon U–Pb and Hf isotope constraints from the Ailao Shan–Red River shear zone on the tectonic and crustal evolution of southwestern China

Reconstructing South China in Phanerozoic and Precambrian supercontinents

“…The suture zone is a belt up to 30 km wide composed of disrupted and discontinuous Proterozoic to Cenozoic rock units. The early history of the zone has been extensively modified by late Paleozoic to early Mesozoic reactivation during closure of the Paleo-Tethys Ocean and accretion of the Indochina Block to the southeast (Cai et al, 2014;Lin et al, 2012;Zi et al, 2013). Subsequent Cenozoic strike-slip deformation associated with the India-Asia collision further reactivated the suture zone (Tapponnier et al, 2001, and references therein).…”

Late Miocene provenance change on the eastern margin of the Yinggehai-Song Hong Basin, South China Sea: Evidence from U–Pb dating and Hf isotope analyses of detrital zircons

“…6) are in response to the "Jinningian Movement (1000e700 Ma)" in the South China Block, and may be associated with the breakup of the Rodinian supercontinent (Li et al, 2002). Anorogenic granite intrusions are widely distributed in the Yangtze Block (Chen and Jahn, 1998) and range from mafic to felsic in composition (Lin et al, 2012). There are many rock outcrops along the Red River Fault Zone on the southern margin of the Yangtze Block, and their emplaced ages range from 840 to 740 Ma with a peak at ca.…”

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

“…Li, 2003;Z. Li, 2003;Zhou et al, 2006;Huang et al, 2008;Liu et al, 2008;Wang et al, 2011;Lin et al, 2012) in the Pangzhihua-Yuanyang region. 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.…”

“…It has been commonly accepted that the Main Paleo-Tethys had opened in the Silurian-Devonian and closed in the Triassic by an east-directed (modern orientation) subduction beneath Indochina-Simao (Metcalfe, 2013;Zaw et al, 2014). As for the Ailaoshan Ocean, structural overprinting and displacement related to the Cenozoic indentation tectonics of SE Asia (Tapponnier et al, 1990;Leloup et al, 2007;Lin et al, 2012) have led to several unresolved issues: the first issue centers on when and how the Ailaoshan Ocean was opened. Based on fossil evidence and zircon U-Pb dating of volcanic rocks, some researchers suggested that the ocean may have opened by back-arc spreading related to north-directed subduction of the Main Paleo-Tethys beneath Indochina-Simao in the Late Devonian-Early Carboniferous or Permian (Wang et al, 2000;Metcalfe, 2002;Metcalfe, 2006;Fan et al, 2010;Pan et al, 2012).…”