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一种改进的国家铀资源评价方法(NURE)将用来替代美国能源部(DOE)的标准NURE方法,后者曾用于1980年10月国家资源评价报告中。这里首次介绍了被称为“矿床-规模-频率”(DSF)的改进方法,并且对比了由上述两种方法进行计算的结果。结果表明,用DSF方法较NURE方法所得到的资源量的估值要大得多,且具有更大的不确定性。我们认为,DSF方法比NURE方法提出了更符合实际的估值,因为在资源量方程式中被估算的主要因子被分解为更多的部分,与特定的地质认识更紧密相关。 DSF方法由改进的标准NURE估算方程U=A·F·T·G组成,用一个单因子替代F·T因子,单因子表示在所有规模等级中全部矿床的吨数。应用DSF方法有两个要求,一是在1个已知地区或控制区内已确定了矿床规模频率,二是已经确定了矿床规模频率分布与可能的控矿地质因素之间的关系。利用这些关系,主要科学家(PS)首先估算规模等级的数目和范围,然后对每一个规模等级,估算了有利地区矿床数目的下限、最可能值和上限。一旦这些可能的估算通过PS进行的论证而加以改进,它们就被代入到DSF方程式中,利用Ford和McLaren编制的程序并稍加改进,计算未发现铀资源量估值的概率分布。
An improved national uranium resource assessment methodology (NURE) will be used to replace the standard Department of Energy (DOE) NURE methodology, which was used in the October 1980 National Resource Assessment. For the first time, an improved method called “deposit-size-frequency” (DSF) is introduced, and the results calculated by the above two methods are compared. The results show that the DSF method is much more valuable than the NURE method in estimating the amount of resources and has greater uncertainty. In our opinion, the DSF method proposes a more realistic valuation than the NURE method because the main factors that are estimated in the resource equation are broken down into more parts that are more closely related to a particular geological understanding. The DSF method consists of a modified standard Nure estimation equation U = A · F · T · G, replacing a F · T factor with a single factor and a single factor representing the tonnage of all deposits in all scale classes. There are two requirements for applying the DSF method. One is to determine the size of the ore deposit in a known area or control area and the other is to determine the relationship between the ore bed size and frequency distribution and possible ore-controlling geological factors. Using these relationships, the leading scientist (PS) first estimates the number and extent of scale grades and then, for each scale, estimates the lower limit, the most likely value, and the upper limit for the number of deposits in the favorable area. Once these possible estimations have been refined by argumentation conducted by PS, they were substituted into the DSF equation to calculate the probability distribution of uranium resource estimates not found using the procedures compiled by Ford and McLaren with slight improvements.