Paleoproterozoic reworking of ancient crust in the Cathaysia Block, South China: Evidence from zircon trace elements, U-Pb and Lu-Hf isotopes

Origin of paleosubduction-modified mantle for Silurian gabbro in the Cathaysia Block: Geochronological and geochemical evidence

“…1). The Cathaysia basement has been proposed to be of a Paleoproterozoic (1.8-2.0 Ga) origin and is dominantly composed of schist, gneiss, amphibolite, migmatite and volcanoclastics (e.g., Fujian BGMR, 1985;Liu et al, 2009;Yu et al, 2009Yu et al, , 2010Zhejiang BGMR, 1989). Along the Wuyi Revised from Wang et al (2012b).…”

Formation and evolution of Precambrian continental lithosphere in South China

“…1.85 Ga but different ε Hf (t) values of −7 to −3 and −15.6 to −10.0, respectively (Xiang et al, 2008;Liu et al, 2009), suggesting that they are reworked products of the Archean crust in the middle Paleoproterozoic. Granitoids with similar zircon U-Pb ages have been reported in the same area X.…”

Multi-stage crust–mantle interaction in SE China: Temporal, thermal and compositional constraints from the Mesozoic felsic volcanic rocks in eastern Guangdong–Fujian provinces

“…14b), indicating an increasing contribution of juvenile crust in the petrogenesis and a concomitant decreasing role of recycled "old" crust. Nevertheless, one andesite sample (08JH-212 with a U-Pb age of 165 Ma) from the Li et al, , 2011aLi et al, , 2011bLiu et al, 2009;Wan et al, 2007;Xiang, 2008;Yu et al, 2009a). Assuming that the average crustal 177 Lu/ 176 Hf value of 0.015 (Griffin et al, 2002) is applicable to these basement rocks, it can be shown that most of the Mesozoic lavas have ε Hf (t) values higher than those of basement rocks older than 1.4 Ga.…”