The discovery of one of the largest gold deposits in human history in China's Hunan province has sent shockwaves through the global mining industry. Gold content is extraordinary, averaging 138 grams per ton of ore-roughly 20 times higher than typical global deposits, which yield about 8 grams per ton. Why This MattersRecord-breaking reserves: Even South Africa's largest deposit, South Deep, holds roughly 900 tons of gold. Even South Africa's largest deposit, South Deep, holds roughly 900 tons of gold. Rarity: Easily accessible gold deposits are nearly exhausted, and deep exploration requires significant investment.