Release of gold-bearing fluids in convergent margin magmas prompted by magnetite crystallization
Sun, Weidong; Arculus, Richard; Kamenetsky, Vadim S; Binns, Raymond
A relationship between convergent margin magmas and copper-gold ore mineralization has long been recognized. The nature of the genetic link is controversial, particularly whether the link is due to high-oxygen-fugacity (fO2) melts and fluids released from subducted slabs or to brine exsolution during magmatic evolution. For submarine, subduction-related volcanic glasses from the eastern Manus basin, Papua New Guinea, we here report abrupt decreases in gold and copper abundances, coupled with a...[Show more]
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