据美国矿山局资料,世界铝土矿储量有三分之二分布在四个国家——几内亚(27％),澳大利亚(21％),巴西(11％)和牙买加(9％)。进入平衡表和已得到证实的世界铝土矿储量为134.44亿吨,预测的储量有38.15亿吨。在六十年代和七十年代,发展中国家和资本主义国家铝土矿的开采量平均每年增加6％以上。各地区开采量的增加是不平衡的。比如,在六十年代初,澳 According to the US Bureau of Mines, two thirds of the world’s bauxite reserves are distributed in four countries - Guinea (27%), Australia (21%), Brazil (11%) and Jamaica (9%). Into the balance sheet and the proven world bauxite reserves of 13.444 billion tons, the forecast reserves of 38.15 billion tons. In the 1960s and 1970s, bauxite mining in developing and capitalist countries increased on average by more than 6% annually. The increase in the amount of extraction in various regions is not balanced. For example, in the early 1960s, Australia