RE:RE:RE:RE:RE:New name for Orex exploration soon.
Cutoff grade depends on many factors...big one being underground mining vs open pit. The second example below, which I randomly grabbed from the internet, shows how even one deposits cutoff grade can vary depending upon the mining method.
At its Frankfield East deposit, 42 km northeast of Timmins, GoWest Gold (GWA-V) announced an updated resource in June. The deposit now holds 1.6 million indicated tonnes grading 6.68 grams gold per tonne for 348,000 oz. gold, plus 4.3 million inferred tonnes grading 6.01 grams gold, at a cutoff grade of 3 grams gold per tonne. Most of the current resource is located above 350 metres depth because of a lack of drill density at greater depths, but mineralization is known to extend to 1,000 metres vertical depth and across an average strike length of 800 metres.
... Resource estimates were conducted by A.C.A. Howe International Limited according to CIM standards. The Garrcon deposit estimates showed 15.1 million tonnes with an average grade of 1.07 g/t Au (521,000 oz) in measured resources; 14.1 million tonnes averaging 1.16 g/t Au (526,000 oz) in indicated resources; and 1.7 million tonnes averaging 0.72 g/t Au (39,000 oz) in inferred resources. Potential underground resources of 5.1 million tonnes averaging 3.49 g/t Au (577,000 oz) in the inferred category were also outlined. Resources were reported at a cut-off grade of 0.4 g/t Au for open pit extraction and 1.5 g/t in a bulk underground mining scenario using a gold price of US$1,250/oz.
So we need to wait and see what cutoff will use based on their review as the new mine plan for example might include small open pits which would have varying cutoffs grades as the example above highlights.
I know in the past one company suggested to Orex that the site should be minded with a serieces of small open pits as well as underground development...chasing the high-grade identified in the open pits underground. I like this suggestion as one can get a much better understanding of the controling structures that govern the geometry of the high-grade ore when you see it in the pit. Would be invaluable when they move underground IMHO.