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据美刊《世界采矿》一九七七年第一期报道,继1970年在美国西南部发现第26个斑岩铜矿之后,格蒂石油公司和汉纳采矿公司在亚利桑那州又发现一个大型高品位的深部斑岩铜矿床.有人认为,从品位和金属总量来看,这是世界最大的铜矿之一.新发现的卡萨格兰德矿床位于亚利桑那州萨卡顿斑岩铜矿的西南部.据称,13个钻孔在地表下2500～3500英尺(约含762～1067米)深处打到铜矿体,这些钻孔都是间距为500～
According to the first issue of the American Journal World Mining in 1977, following the discovery of the 26th porphyry copper mine in southwestern United States in 1970, the Goldie Oil Company and Hanna Mining Company in Arizona found another large High-grade deep porphyry copper deposits Some believe that this is one of the largest copper mines in the world in terms of grade and total amount of metals.The newly discovered Casa Grande deposit is located at the Sagacorn porphyry copper in Arizona It is said that 13 boreholes hit the copper ore body at a depth of 2,500 to 3,500 feet (about 762 to 1,067 meters) above the Earth’s surface, all of which bore holes of 500 ~