通过对勘查程度为详查的铜矿、铁矿实例分析,说明了当前地质勘查规范中资源储量分类和工业指标选择的相互制约关系以及矿体外推原则.详查阶段,未作预可行性研究,应采用一般工业指标圈定矿体,若进行了预可行性研究,表明降低工业指标是经济的、可行的,则应将控制的(332)资源储量分类为经济基础储量(122b).矿体圈定外推原则为,在控制的(332)资源量基础上,可一次外推推断的(333)资源量,但不得再外推预测的(334)资源量；在推断的(333)资源量基础上可一次外推预测的(334)资源量.同时指出,评价前寒武纪沉积变质铁矿时,工业指标首先应满足mTe指标要求.%The extrapolation principle of ore deposit in the current geological exploration and the mutual constraints between the reserves classifications and the selection of industrial index were evaluated through a case study analysis on a detailed exploration degree of copper and iron ore body. At the detailed exploration stage, the general industrial index of the delineated ore bodies should be used if no pre - feasibility analysis had been performed. However, if the conducted pre - feasibility analysis indicated the reduction of industrial index feasible and economic, the controlled reserves (332) should be extrapolated to the economic base (122b). Moreover, the extrapolation principle of ore body indicated that the controlled reserves 332 can only be extrapolated to reserves 333 but not reserves 334 and the reserves 333 can only be extrapolated to reserves 334. Furthermore, this principle also indicated that the selected industrial index must meet the requirement of mTe index when evaluating the situation of Precambrian metamorphosed sedimentary iron ore deposit.
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