> while in mining 1t contains around 2-3% of Gold

Where in the world would that be true? That would be 800 - 1000 ounces per ton! As far as I know the best pay dirt produces a handful of ounces per ton, or 0.01%.

2-3% of 1 ton is 40-60 pounds of gold, and that's using the smaller, non-metric tons. 200g is about half a pound, so you'd be looking at 80x more gold per ton from traditional mining on the low end