美国地质调查所的年度报告提出,大多数矿物在高温下比低温下可溶性大,但黄铜矿和辉铝矿却具有相反的行为。倘若如此,则可预料铜和铝矿床比其它金属如铅和银形成的时期早而且深度大。另一方面,若在近地表有铅—银矿床产出,则表明深部有下伏的铜和钼矿床 The annual report of the United States Geological Survey suggested that most minerals are more soluble at higher temperatures than at lower temperatures, but chalcopyrite and bauhite have the opposite behavior. If so, it is expected that copper and aluminum deposits will be earlier and denser than other metals such as lead and silver. On the other hand, if there is lead-silver deposit near the surface, it indicates that the underlying copper and molybdenum deposit