Xiao-Hua Deng

Features and significance of the Yudai porphyry copper deposit in the Kalatag district, eastern Tianshan, NW China

The eastern Tianshan region covers around 60000 km in area and is located in the eastern part of Xinjiang. The district contains various types mineral commodities including Cu, Ni, Au, Fe, Pb and Zn (Wang et al., 2006). The Dannanhu belt in eastern part of the area is interpreted as a volcanic arc and forms an important mineralized zone bordered by the Turpan-Hami Basin to the north and Kanggur back-arc basin to the south. Several porphyry deposits have been discovered in eastern Tianshan region, including Tuwu-Yandong, Linlong, Chihu, Yuhai and Sanchakou deposits (Wang and Zhang, 2016). Numerous studies have been completed on late Palaeozoic magmatic rocks in the district, but less attention has been paid to early Palaeozoic igneous rocks. Several early Paleozoic Cu-polymetallic deposits have discovered in the Kalatag district of eastern Tianshan region within the last ten years, including the South Meiling VMS deposit, Hongshi hydrothermal vein deposit and Yudai porphyry Cu deposit (Deng et al., 2016a, b). Yudai was discovered in 2011, but the paragenesis of the deposit has been poorly understood due to the lack of detail studies. This paper is mainly describe the above issues. *