Sun, Weidong; Liang, Hua-Ying; Ling, Ming-xing; Zhan, Mei-zhen; Ding, Xing; Zhang, Hong; Yang, Xiao-yong; Li, Yi-liang; Ireland, Trevor; Wei, Qi-rong; Fan, Wei-ming
Porphyry copper deposits account for more than 80% of the world's total Cu resources. However, the formation mechanism and controlling factors of porphyry copper deposits remain obscure. Previous studies have revealed that porphyry copper deposits are usually associated with oxidized, calc-alkalic, adakitic shallow intrusive rocks. Here we show that hematite-magnetite intergrowths are commonly found in porphyry copper deposits, suggesting high and fluctuating oxygen fugacity (fO2). Oxidation...[Show more]
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