Sustainability Reporting in the Gold Mining Industry: The ...
The gold ore grades for hard rock mining for some countries are shown in Figure 2, including the price of gold in both dollars of the day and 1998 US dollars. The effects of the California gold rush in 1849, followed by the gold rushes in Australia in 1851 and South Africa in 1884 are evident. The development of new cyanide milling technology (carboninpulp, CIP) and the 1970s rise in the ...