The Miocene Gangdese porphyry copper belt generated during post-collisional extension in the Tibetan Orogen

The formation of Qulong adakites and their relationship with porphyry copper deposit: Geochemical constraints

“…This is supported by the systematic older zircon U-Pb ages (16.4 ± 0.4-17.7 ± 0.3 Ma) of Qulong adakitic samples so far studied than the Re-Os isochron ages (15.36±0.21-16.41 ± 0.48 Ma) ( Fig. 13; Hou et al, 2009;Li and Rui, 2004;Meng et al, 2003b;Rui et al, 2003). However, Qin et al (2014) analyzed zircons from ore-bearing adakitic monzogranite porphyry and obtained the age of 15.3 ± 0.6 Ma, which is identical to the Re-Os isochron ages within error, and these adakites may be the most likely 'ore-forming adakites'.…”

Geochronology and geochemical characteristics of Late Triassic porphyritic rocks from the Zhongdian arc, eastern Tibet, and their tectonic and metallogenic implications

“…The complex evolutionary history of this orogenic belt is not yet well understood (e.g., Boulin, 1991;Sorkhabi and Heydari, 2008;Tommasini et al, 2011;Lu et al, 2012;Zhang and Santosh, 2012;Goldfarb et al, 2013;Lai et al, 2013a,b;Zheng et al, 2013;Zhu et al, 2013). Intrusive and volcanic rocks are widely distributed in the belt, and are often accompanied by a diverse range of mineral deposits, including porphyry Cu and Cu-Au (e.g., Hou et al, 2004Hou et al, , 2007Hou et al, , 2009Hou et al, , 2011Li et al, 2011;Xia et al, 2011;Lu et al, 2012;Richards et al, 2012;Goldfarb et al, 2013;Kamvong et al, 2013;Wang et al, 2013). In eastern Tibet, there were two main periods of porphyry Cu mineralization: Late Triassic (e.g., the Pulang porphyry Cu deposit), corresponding to the closure of the Paleo-Tethys Ocean; and Early Tertiary (e.g., the Yulong porphyry Cu deposit), corresponding to continental collision.…”

Paleozoic–Mesozoic Porphyry Cu(Mo) and Mo(Cu) Deposits within the Southern Margin of the Siberian Craton: Geochemistry, Geochronology, and Petrogenesis (a Review)

“…In general, porphyry Mo and Mo-Cu deposits in Eastern Transbaikalia occurred in a fashion similar to porphyry Cu-Mo deposits from the Tibet-Himalayas and North-China craton-Yangtze collision zones [14,18]. In contrast to magmatic belts in the Altai-Sayan segment and Northern Mongolia, the Mesozoic magmatic belt in Eastern Transbaikalia is located in a region underlain with the Precambrian basement.…”

“…The porphyry series at the Zhireken deposit include rocks of two types: (1) porphyries with adakite-like geochemical signatures and (2) porphyries with typical arc-like characteristics (Y > 18 ppm, Yb > 1.18 ppm, and Sr/Y < 30) with a relatively low Mg# (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) and Eu/Eu* ratio (0.35-0.40). Adakite-like rocks are characterized by elevated K 2 O contents and K 2 O/Na 2 O ratio of~1.…”