Zircon U–Pb geochronology, geochemistry, and Sr–Nd–Hf isotopes of granitoids in the Yulekenhalasu copper ore district, northern Junggar, China: Petrogenesis and tectonic implications

Magmatic sequences in the Halasu Cu Belt, NW China: Trigger for the Paleozoic porphyry Cu mineralization in the Chinese Altay–East Junggar

“…Quartz porphyry, as mentioned by Yang et al (2014) but not identified in this study, is exposed only in the Yulekenhalasu ore district as dykes emplaced in the Lower Carboniferous Jiangbasitao Formation, which makes it obviously different from the earlier intrusions. It has a porphyritic texture with quartz and minor plagioclase as phenocrysts, and a groundmass of quartz, plagioclase and biotite.…”

“…3a, b), also referred to as porphyritic monzonite by Yang et al (2014), and an alkali granite porphyry (Fig. 3c, d).…”

Mid-Late Paleozoic metallogenesis and evolution of the Chinese Altai and East Junggar Orogenic Belt, NW China, Central Asia

“…1) is an Ashele Fm. tuff that yielded a concordant zircon U-Pb age of 387.0 ± 4.2 Ma, whereas the footwall basalt gave a weighted average 206 Pb/ 238 U age of 388.0 ± 3.3 Ma (Yang FQ et al 2014). The two ages indicate that the principal orebody of the Ashele Cu-Zn deposit formed during the Mid-Devonian, at around 388 Ma (Tab.…”

“…composed mainly of oceanic arc-type volcanic and pyroclastic rocks, the Lower to Mid-Devonian Ashele Fm. that contains fossiliferous sediments, basaltic pillow lavas, hyaloclastites, massive basaltic lavas, lapilli tuffs A e r m a n t a i F a u l t Junggar Basin Z a is a n g L a k e 49°N 87°E 85°E 89°E 91°E 49°N 47°N 91°E 89°E 87°E and dacitic lavas (Niu et al 2006;Yang FQ et al 2014), and the Mid-Devonian Altai Fm. of low-grade forearc turbidites.…”

The Paleozoic tectonic evolution and metallogenesis of the northern margin of East Junggar, Central Asia Orogenic Belt: Geochronological and geochemical constraints from igneous rocks of the Qiaoxiahala Fe-Cu deposit

“…13a). The 390-370 Ma arc-related magmatism in the northern margin of East Junggar, including the Qiaoxiahala diorite porphyry, occurred in this period with synchronous arcrelated Fe-Cu (-Au) mineralization, including the Qiaoxiahala FeCu deposit, Laoshankou Fe-Cu-Au deposit and the arc-related Halasu, Yulekenhalasu and Kakasayi porphyry Cu deposits (Yao et al, 2007;Zhao et al, 2009;Yang et al, 2014;Wu et al, 2015).…”