No, all the gold and silver that was there is still there. Here are the calculations for the value of the 30k tons that still contain around 4 g/t, not 16 g/t:

30,000 tons x 4 g/t = 120,000 g. At 31 g/oz, that's 3871 oz. At $1600/oz, that's $6.2M, which is about the number floating around.

And once again- It is NOT concentrate. It is partially depleted ore that has had ~20% of the gold removed. Start with ~5 g/t, remove ~20% (1 g/t), and you're left with ore that is now ~4 g/t.