隐伏矿产资源评价和勘查早期,以及计划阶段,需要建立预可行成本模式。勘查过程中,区分经济与非经济矿床的这些成本模式有助于勘查企业集中在能获益的靶区勘查。资源评价过程中,这些模式用来排除那些即便发现但没有经济价值的矿床。美国矿业局(USBM)先前建立的简化成本模式就是 Concealment of mineral resources evaluation and exploration early, and the planning stage, the need to establish a pre-feasibility cost model. During the exploration, these cost models that differentiate between economic and non-economic deposits help exploration companies concentrate on target areas that can benefit from exploration. During resource evaluation, these models are used to exclude deposits that are found, but of no economic value. The simplified cost model previously established by the U.S. Bureau of Mining (USBM) is