Because ore grades of 30 ppm are usually wanted before gold is visible to the bare eye, in most gold mines the gold is invisible. During the nineteenth century, gold rushes occurred each time giant gold deposits have been found. The first documented discovery of gold within the United States was on the Reed Gold Mine close to Georgeville, North Carolina in 1803. The first main gold strike in the United States occurred in a small north Georgia city called Dahlonega.
This can be represented by a cube with an edge length of about 21 meters. At $1,349 per troy ounce, 187,200 metric tonnes of gold would have a price of $8.9 trillion. According to the United States Geological Survey in 2016, about 5,726,000,000 troy ounces (178,one hundred t) of gold has been produced because the starting of civilization, of which 85% remains in use.
The average gold mining and … Read More