Kwangsian crustal anatexis within the eastern South China Block: Geochemical, zircon U–Pb geochronological and Hf isotopic fingerprints from the gneissoid granites of Wugong and Wuyi–Yunkai Domains

Geochronological, geochemical and Nd–Hf–Os isotopic fingerprinting of an early Neoproterozoic arc–back-arc system in South China and its accretionary assembly along the margin of Rodinia

“…Li et al, 2010c;Wang et al, 2012b,c). Recent geochronological data have shown that the Neoproterozoic and even Paleozoic units are additionally presented within the previously mapped basement succession (e.g., Li et al, 1998;Wang et al, 2007cWang et al, , 2010bWang et al, , 2011bWang et al, , 2012cWan et al, 2007Wan et al, , 2010Yu et al, 2009Yu et al, , 2010Li et al, 2010aLi et al, ,c, 2011. Within the Cathaysia basement, there are small amounts of mafic and ultramafic rocks (e.g., amphibolite, metagabbro, metadiabase, metabasite, peridotite and pyroxenite), which occur mainly as lens, pods and fragments (e.g., Fujian BGMR, 1985;Guangxi BGMR, 1985;Guangdong BGMR, 1988;Zhejiang BGMR, 1989;Zhang et al, 2012a).…”

“…Our plagioclase amphibolite, amphibolite and metadiabase occur as either lenses in middle Paleozoic (∼460-420 Ma) and Neoproterozoic (∼860-790 Ma) granitoid gneiss, or intrusions in Paleoproterozoic gneiss (e.g., Wang et al, 2011b, Shu et al, 2011. They have experienced middle Paleozoic and early Mesozoic highgrade metamorphism, as evidenced by metamorphic zircon ages for four plagioclase amphibolites and amphibolites (421 ± 13 Ma, 422 ± 13 Ma, 243 ± 3 Ma and 221 ± 4 Ma for 09WG-58D, 09WG-66A, 09WG-74C and YK-9A, respectively).…”

“…2a and b; e.g., Cawood, 1999, 2012;Yu et al, 2009Yu et al, , 2010 Huangtian and Zhuhuang (Qinyuan) and Shitun (Zhenghe) in the Wuyi and Shiwo (Beiliu), Liuwan (Rongxian), Jintong and Zhaimen (Xinyi) in Yunkai domains, respectively (revised after Wang et al, 2011b). See inset in Fig.…”

Petrogenesis of the early Paleozoic strongly peraluminous granites in the Western South China Block and its tectonic implications

“…It is well documented that numerous economically important metallic deposits (i.e., W, Sn, Nb, Ta and REE deposits) are closely associated with granites in the area (e.g., Hua et al, 2013 and references therein). Therein, the early Paleozoic granitoids that are dominated by SP granitic rocks (e.g., Wang et al, 2007Wang et al, , 2011Li et al, 2010;Zhang et al, 2012b) with minor I-type granites (e.g., Huang et al, 2013;Zhao et al, 2013), are distinctly different from other granitic generations in the SCB, although the total exposure is relatively less than those of the Yanshanian granites (e.g., Sun, 2006;Hua et al, 2013). The existence of such a huge volume (up to 10,000 km 2 ) of early Paleozoic SP granitoids in the SCB has triggered extensive discussion about its origin and genesis, particularly in recent five years (e.g., Wang et al, 2007Wang et al, , 2011Wang et al, , 2012Li et al, 2010;Zhang et al, 2012b).…”

“…Therein, the early Paleozoic granitoids that are dominated by SP granitic rocks (e.g., Wang et al, 2007Wang et al, , 2011Li et al, 2010;Zhang et al, 2012b) with minor I-type granites (e.g., Huang et al, 2013;Zhao et al, 2013), are distinctly different from other granitic generations in the SCB, although the total exposure is relatively less than those of the Yanshanian granites (e.g., Sun, 2006;Hua et al, 2013). The existence of such a huge volume (up to 10,000 km 2 ) of early Paleozoic SP granitoids in the SCB has triggered extensive discussion about its origin and genesis, particularly in recent five years (e.g., Wang et al, 2007Wang et al, , 2011Wang et al, , 2012Li et al, 2010;Zhang et al, 2012b). Nonetheless, the genesis and tectonic implications of these granites, particularly whether the mantle-derived magmas were involved in the SP granite formation, are still unclear due to the lack of contemporaneous mafic rocks, although some authors have invoked the addition of some basic materials to account for their geochemical signatures (e.g., Wang et al, 2011;Zhang et al, 2012b).…”