important characteristic of supergene gold ore:-may represent...

important characteristic of supergene gold ore:
-may represent the only mineable reserves of an otherwise uneconomic primary mineralisation.
-commonly only a minor proportion of total reserves of major deposits, but yield early cashflows. (http://www.janetsgoldnuggets.com/butt.pdf)

Per Ozl's own figures, the revenue from the supergene ore (GOLD) more than offsets the recorded costs of mining COPPER!!!
The supergene ore at Ozl has now been virtually depleted leading to a dramatic fall in gold revenue IN COMING MONTHS.

At the same time Ozl is now having to operate underground operations leading to much higher costs, lower grades, more waste ore being processed just to try to maintain falling output.

Bottom line is falling profits and outputs for Ozl!!