Such study of the optimal industrial grade of the ancient conglomerate alluvial gold deposit is seldom seen abroad and the first time to be made domestically.
砾岩型古砂金矿床的工业品位研究在国内尚属首例，国外也不多见。
The probability curves of alluvial fan conglomerate reservoir have the characteristics of coarse-grained, wide-range and low-slope.
粒度分析资料是一个传统的划相指标，洪积扇储层的概率粒度曲线以其粗粒度、宽区间、低斜率为特征。
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