据美国一些采矿公司与勘探公司的找矿地质学家最近谈,美国现在不太重视斑岩铜矿了.由于铜价降低,加之斑岩铜矿品位低,开采每吨铜的成本,已相当于六十年代的三倍.美国国内的斑岩铜矿绝大部分均已发现,许多因品位低都没有开采.许多美国公司目前在国外寻找斑岩铜矿,而国内的找矿活动很有限.一些公司,例如阿迈克斯公司,将兴趣集中在富含钼、钨、银以及 According to recent talks by prospecting geologists from some mining companies and exploration companies in the United States, the United States is paying less attention to the porphyry copper deposits now, and the cost per tonne of copper has been reduced due to the lower copper price and the low grade of the porphyry copper ore Three times the size of the 1960s, the vast majority of porphyry copper mines in the United States have been discovered, many of which are not mined because of low grade. Many U.S. companies are currently looking for porphyry copper mines abroad while domestic prospecting activities are limited. Some companies, such as AMAX, focus their interests on molybdenum, tungsten and silver as well