U–Pb geochronology and Hf-isotopes on detrital zircons of Lower Paleozoic strata from Hainan Island: New clues for the early crustal evolution of southeastern South China

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

“…Previous studies on lower Paleozoic detrital sedimenatry rocks in the South China Block have also found abundant detrital zircons with Pan-African age and concluded that the South China Block should be linked with and received detritus from North India and Western Australia during the assembly of East Gondwana. Our new data is consistent with and provided more evidence for this conclusion Xu et al, 2013;Zhou et al, 2015).…”

“…Dong et al, 2011;Duan et al, 2011;Wang et al, 2012;Xu et al, 2013;Q.F. Wang et al, 2014;Zhou et al, 2015). These data may imply that Neoproterozoic intrusions with negative zircon εHf(t) values in the Yangtze Block may have more exposure before than that today.…”

“…8), implying reworking of older crustal material. Although no igneous rocks with 530-650 Ma have yet been identified in South China, abundant detrital zircons of this age have been widely reported in Upper Neoproterozoic to Cambrian sequence in both the Yangtze and Cathaysia blocks Xu et al, 2013;Zhou et al, 2015). These sedimentary rocks can supply the detrital zircons with age 530-650 Ma.…”

Provenance and tectonic-paleogeographic evolution: Constraints from detrital zircon U–Pb ages of Late Triassic-Early Jurassic deposits in the northern Sichuan basin, central China

“…1; Zhang, 2002), western Jiangnan orogen (Chu et al, 2012) and Cathaysia block ( Fig. 1; Wang et al, 2011;Zhou et al, 2015). The last two units (i.e., western Jiangnan orogen and Cathaysia block) were reported with magmatic-derived zircons characterized by mainly negative e Hf (t) values (Chu et al, 2012;Wang et al, 2011;Zhou et al, 2015), which is consistent with Hf data of early Paleozoic detrital zircons of samples WC02 and WY05 from the northern Sichuan basin , suggesting both as a possible source of early Paleozoic detrital zircons.…”

Provenance and depositional setting of Lower Silurian siliciclastic rocks on Hainan Island, South China: Implications for a passive margin environment of South China in Gondwana

“…In summary, the Lower Silurian Tuolie Formation is a thick, bathyal to abyssal facies, continental shelf to slope, clastic turbiditic succession with minor volcanic rocks, tuffites, tuffaceous siltstones, and intercalated limestones, and has similar geochemical compositions to those from a cratonic or recycled-orogen provenance (Bhatia, 1983;McLennan et al, 1990). According to Metcalfe (2011Metcalfe ( , 2013 and others (e.g., Jiang et al, 2003;Su et al, 2009;Usuki et al, 2013;Wang et al, 2014a;Zhou et al, 2014), the SCB was closely related to the evolution of the northeast Gondwana in the early Palaeozoic. The geochemical characteristics and depositional setting of the Early Silurian (meta)siliciclastic rocks in Hainan Island may indicate a special position for the SCB in Gondwana.…”