An objective technique for determining end-member compositions and for partitioning sediments according to their sources
An objective technique for determining end-member compositions and for partitioning sediments according to their sources
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DOI：
10.1016/0016-7037(84)90348-x
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发表时间：
1984
影响因子：
5
通讯作者：
M. Leinen;N. Pisias
中科院分区：
文献类型：
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作者：
M. Leinen;N. Pisias
Q型因子分析的一种改进为地质混合物的端元表征提供了一种客观的技术。因子分析并不常用于确定地质混合物中端元源的实际组成，因为在分析过程中原始数据变量的转换导致某些变量的负因子得分和端元中某些变量的负“浓度”。我们使用一个非正交旋转的端元向量的平均向量，使端元到正向量space.This技术上展示了一个大型数据集的散装沉积物表面样品的元素分析，从纳斯卡板块在东南太平洋。之所以选择这些数据，是因为它们以前曾被详细研究过。我们的技术确定了五个地质上合理的端员，代表碎屑，硅质生物沉积物，热液沉积物，氢或自生沉积物，和生物碎屑溶解后留下的难熔残留物。端员的数量，组成和分布是类似的那些来自以前广泛的沉积物分区研究。
A modification of Q-mode factor analysis provides an objective technique for end-member characterization of geologic mixtures. Factor analysis has not often been used to determine the actual composition of end-member sources in geologic mixtures, because transformations of the original data variables during the analysis result in negative factor scores for some variables and negative “concentrations” of some variables in the end-members. We use a non-orthogonal rotation of end-member vectors toward the mean vector to bring the end-members into the positive vector space.This technique is demonstrated on a large data set of elemental analyses of bulk sediment surface samples from the Nazca Plate in the southeast Pacific. These data were chosen because they had been studied in detail previously. Our technique identified five geologically reasonable end-members which represent detritus, siliceous biogenic sediment, hydrothermal sediment, hydrogenous or authigenic sediment, and a refractory residue left after the dissolution of biogenic debris. The number, composition, and distribution of the end-members are similar to those derived from previous extensive partitioning studies of the sediments.