The Exergy Evolution of Mineral Wealth - Thanatia: The Destiny of the Earth's Mineral Resources - page 422

2

80,000

B*, ktoe

Copper - 2068

70,000

s

60,000

50,000

40,000

Cobalt - 2073

Tantalum (R.B.) - 2046

30,000

Gold (R.B.) - 2001

20,000

Nickel sulph.
2033

10,000

Zinc - 2062

Zirconium - 2006

0

1890 1940 1990 2040 2090 2140 2190 2240 2290

Year