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Resources have increased from 50 million tonnes grading 0.92% copper to 60Mt at 0.98% copper (plus silver).
MOD's initially anticipated US$155 million project was flagged to produce 23,000t per annum of contained copper from a 2.5Mt processing operation, with the expansion to 4Mtpa costing another $37 million.
A feasibility study is expected to be completed at the end of the March quarter in 2019.
MOD has not specified potential output beyond the expanded 28,000tpa scenario.
The upgraded resource follows completion of a 90-hole program of infill and extensional diamond core drilling around the planned pit at T3
A major regional drilling program is also underway.
MOD holds a 70% interest in the project, with AIM-listed Metal Tiger owning the balance.
MOD raised A$18 million earlier this year by issuing new shares at the equivalent of 47c per share - with the raising priced at 4.7c ahead of a 10-to-1 consolidation.
Shares in MOD closed Friday at A42c, capitalising the company at A$99.5 million.
The stock is down around 30% on levels traded at 12 months ago.