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在国外的金属矿床勘探领域内,由于各种近地表的矿床已经进行了大量的勘探,所以对有经济价值的矿床的勘探工作日益复杂而困难.美国摩根博士曾指出,一个公司勘探一个大型矿床要花6至10年时间,每年耗资约1.5～3百万美元.加拿大E.A.斯柯尔兹和A.G斯帕特对四个矿床的调研结果也表明,通过地面勘探工程发现和开发这四个矿床的平均总费用约
In the field of foreign exploration of metal deposits, exploration of economically valuable deposits has become increasingly complicated and difficult due to the large amount of exploration already carried out by various near-surface deposits, and Dr. Morgan of the United States has pointed out that when a company is exploring a large deposit It takes 6 to 10 years to spend about 1.5 to 3 million U.S. dollars annually The findings of the four mineral deposits by EA Scurtz and AG Spaat in Canada also show that the four deposits have been discovered and developed through ground exploration projects The average total cost of about