Early Carboniferous adakitic rocks in the area of the Tuwu deposit, eastern Tianshan, NW China: Slab melting and implications for porphyry copper mineralization

Geochronology and geochemistry of igneous rocks in the Bailingshan area: Implications for the tectonic setting of late Paleozoic magmatism and iron skarn mineralization in the eastern Tianshan, NW China

“…Li et al, 2002;Xiao et al, 2004;Li et al, 2006;Hou et al, 2014;Wang et al, 2014), its late Paleozoic tectonic setting is still controversial. Major controversies lie in the subduction polarity and the existence of a back (intra)-arc basin.…”

“…A third hypothesis proposed that a bipolar subduction of the Kanggur oceanic plate had generated the Aqishan-Yamansu island arc in the south and the Dananhu-Tousuquan island arc in the north (W.M. Li et al, 2002Li et al, , 2006Wang et al, 2014 Ar plateau ages of phengite (ca. 334 and 331 Ma) from an omphacite-phengite-bearing blueschist, which formed in a Paleozoic accretionary wedge on the southern side of the Yili-Central Tianshan (YCT) block, Gao and Klemd (2003) considered that the subduction of the South Tianshan Ocean plate (which separated the Tarim craton and the YCT block) may have been completely finished by the end of the Early Carboniferous (Fig.…”

“…Hence, the Kanggur oceanic plate is suggested to have continued to subduct below the YCT block from the north into the Late Carboniferous, with the subductionrelated arc and back-arc system forming on the northern side of the block (W.M. Li et al, 2002Li et al, , 2006Wang et al, 2014;Fig. 15a, b).…”

“…Various proposed hypotheses include local magmatism and ore formation in a southward subduction-related back-arc basin (Hou et al, 2014), northward subduction-related island arc (Yang et al, 1996;Xiao et al, 2004;Han et al, 2014), and bipolar subduction-related island arc (J.Y. Li et al, 2002Li et al, , 2006Wang et al, 2014). In addition, petrogenesis and geochronology of the Tugutublak Formation, one of the most important orebearing strata, remain unclear.…”

SIMS zircon U–Pb and molybdenite Re–Os geochronology, Hf isotope, and whole-rock geochemistry of the Wunugetushan porphyry Cu–Mo deposit and granitoids in NE China and their geological significance

“…Wang et al, 2014b). Most of porphyry Cu-Mo deposits reported in the world took place in subduction zones or arc settings, including the E1 Teniente, Río Blanco-Los Bronces and Los Pelambres porphyry Cu deposits in central Chile (Reich et al, 2003;Jiang et al, 2012), the Chuquicamata porphyry Cu deposit in northern Chile (Barra et al, 2013), the Aryn nuur porphyry Mo deposit in East Mongolia , and the Tuwu-Yandong-Linglong-Chihu porphyry Cu belt in North Xinjiang Zhang et al, 2004;Wang et al, 2014c).…”