摘要
按照地壳的地球物理学概念,选用若干地壳元素丰度表作为统计资料,求出74种元素的算术平均值(X)、几何平均值(G)和标准离差(o)。其G/X介于87.38～99.99%之间,o/X值介于1.18～51.69%之间,因此,可视表1的X值为全球地壳元素丰度的目前最佳估计值或近似值。
According to the definition of the earth's crust which defined by the geophysics,several tables of the abundance of chemical elements in this crust are chosen as the statistical data.Based on these data the arithmetic means (X),the geometric means(G),and the standard deviations(ο) are calculatedfor 74 elements.And among them the range of the G/X values are from 87.38% to 99.99%,and of theο/X values are from 1.18% to 51.69%.Therefore,the arithmetic means tabulated in Table 1 can be usedas the best estimate values or approximate values for the abundance of chemical elements in the globalcrust.
出处
《地质与勘探》
CAS
CSCD
北大核心
1992年第10期1-7,共7页
Geology and Exploration
