yes I do now notice that extra zero I typed by accident but the calculations are based on the volume of 1300x1800x1700m to give 3,978,000,000 cubic meters.. Is this what you were refering to Mr hobbes? At one gram per ton I come up with 9 149 400 000grams or 293 250 000 oz. So if theres more than one gram per ton in the zona central anomoly it would be a lot more than 300 000 000 oz..or did I go wrong in my calculations?