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首页> 外文期刊>Contributions to Mineralogy and Petrology >Quantitative textural analysis of packings of elongate crystals
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Quantitative textural analysis of packings of elongate crystals

机译:细长晶体填充物的定量组织分析

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The spatial distribution of grains in a solidifying igneous rock controls the physical properties of the crystal mush, and in turn is controlled by the rate of crystal growth and accumulation. A predominant non-spherical habit for igneous minerals brings into question the use of spherical particles in reference packings used for quantification of spatial distribution. Furthermore, variations of crystal clustering/ordering with length scale require spatial statistics which take into account the distribution of particles beyond nearest neighbours. Using random close packings of spherocylinders, we demonstrate the importance of aspect ratio for the aggregation index (usually known as R) and show that packings of spherical particles have more structure than packings of rods. The spatial distribution functions demonstrate that the plagioclase grains in the colonnade from the Holyoke basalt are clustered on a length scale of 0.5 mm. Understanding the controls on grain spatial distribution in igneous rocks will depend on the application of these techniques to well-understood environments.
机译:凝固的火成岩中晶粒的空间分布控制着晶体糊状物的物理特性,进而受晶体生长和积累速率的控制。火成岩矿物的主要非球形习性使人们怀疑球形颗粒在用于定量空间分布的参考包装中的使用。此外,随着长度尺度的变化,晶体簇/有序的变化需要空间统计,该空间统计考虑了最近邻居之外的粒子分布。使用球形圆柱体的随机紧密堆积,我们证明了长宽比对于聚集指数(通常称为R)的重要性,并表明球形颗粒的堆积比杆的堆积具有更多的结构。空间分布函数表明,Holyoke玄武岩柱廊中的斜长石晶粒聚集在0.5 mm的长度尺度上。了解火成岩中颗粒空间分布的控制将取决于这些技术在广为人知的环境中的应用。

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