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How many grains are needed for a provenance study?

机译:种源研究需要多少谷物?

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摘要

Detrital provenance studies using single-grain geochronology are very labor-intensive. This paper presents a method for calculating k, the smallest number of grains in a sample that must be dated to achieve a required level of statistical adequacy. For example, if it is desired that no fraction of the population comprising more than 0.05 of the total is missed at the 95% confidence level, at least 117 grains should be dated. The paper also provides recommendations about cases where fewer than the optimal number of grains have been dated.
机译:使用单粒年代学的碎屑物源研究非常费力。本文提出了一种计算k的方法,k是必须达到日期才能达到所需的统计充分性水平的最小晶粒数。例如,如果希望在95%的置信水平上不遗漏总人口中不超过总人口0.05的部分,则应标出至少117个谷物。本文还提供了一些建议的情况,其中已确定日期的谷物数量少于最佳数量。

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