摘要
岩石的磁化率张量的统计处理，传统的处理方法是用费歇尔法，但对于火成岩等磁化率各向异性较弱的岩石，这种方法存在着局限性．本文介绍了“自益再采样法”，并与传统的方法进行了对比．指出，自益再采佯法不仅有助于消除测量过程中的误差，而且它是建立在数据的实际分布之上的，能更准确地反映磁化车轴的实际分布方位以及方位的分散程度．
In studies of the anisotropy of susceptibility or remanence of paleomagnehc samples it is conventiona1 to find the average direction for each principal axis and its associated cone using Fisherian. Shortcomings are round in cases where igneous rocks have very weak anisotropy. The author uses a bootstrap resampling scheme for magnetic susceptibility tcnsors, and compares it with Fisherian. Tt fs shown that the principal axes approximate Kent or FB5 distribution. In the new technique, the diretions and statistically significant AMS clusters of average principal axes are more reliable, because the results are obtained directly from their empirical distributions.
出处
《地球物理学进展》
CSCD
1997年第1期84-88,共5页
Progress in Geophysics
基金
国家自然科学基金
