The kinetics of dissolution of cubanite in aqueous acidic ferric sulfate solutions

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i n c r e a s i n g l y l a r g e f r a c t i o n of the w o r l d ' s c o p p e r p r o d u c t i o n c o m e s f r o m l o w - g r a d e d e p o s i t s in which c o p p e r sulfide m i n e r a l s a r e f i n e l y d i s s e m i n a t e d t h r o u g h o u t the host r o c k . The o p e n - p i t m i n i n g m e t h o d s u s u a l l y a s s o c i a t e d with the e x p l o i t a t i o n of such o r e b o d i e s g e n e r a t e l a r g e t o n n a g e s 1 of w a s t e rock. Although the c o p p e r content of the w a s t e is v e r y low (e.g.,