世界范围内已采出黄金总产量10万多吨,约有40%来自砂金。世界黄金资源总量5.97万吨,其中已探明的黄金储量3.64万吨,远景黄金储量2.33万吨。主要分布在南非、苏联、美国、澳大利亚、菲律宾、加拿大、巴西等国。砂金矿床一般埋藏较浅,赋存条件比较简单,便于找矿和勘探;基建投资少,基建时间短;采选工艺流程比较简单;劳动生产率高,成本 The world has produced a total gold output of more than 100,000 tons, about 40% from the gold. The world’s total gold resources 59,700 tons, of which 364,000 tons of proven gold reserves, long-term reserves of 23,300 tons of gold. Mainly distributed in South Africa, the Soviet Union, the United States, Australia, the Philippines, Canada, Brazil and other countries. Gold-bearing gold deposits are generally shallow burial, relatively simple conditions for deposit, exploration and exploration easier; less infrastructure investment, infrastructure time is short; mining process is relatively simple; labor productivity, cost