eventhough there is a lot more drilling to be done, using the cube method for the last drill results, gives hole BW 59 alone about 5 million ounces. Ofcourse this will not be completely correct (density is difficult to determine exactly and it will never be a perfect cube ofcourse) but what we can determine is that this is a great, great find...
Another plus is that BW 59 is ofcourse not the only hole with gold....
Calculation
329x329x329x 4 (approximate density) x 1,25= 178,056,445, so 178 million grams, that is about 5.5 million ounces.