美国是世界上最大的工业化国家,同时也是矿物原料消耗最多的国家。1997年,美国矿业产值达413亿美元,比1996年增加7%。1997年美国的矿产品进出口贸易总额为92亿美元,其中进口额为55亿美元,出口额为37亿美元。美国1997年的非金属矿物产值为271亿美元,是金属矿物产值的2.2倍(详见 The United States is the world’s largest industrialized country and the country that consumes most of its mineral raw materials. In 1997, the mining output value of the United States reached 41.3 billion U.S. dollars, an increase of 7% over 1996. In 1997, the total import and export trade of minerals in the United States was 9.2 billion U.S. dollars, of which imports were worth 5.5 billion U.S. dollars and exports were 3.7 billion U.S. dollars. The output value of non-metallic minerals in the United States in 1997 was 27.1 billion U.S. dollars, 2.2 times that of metal minerals (see