A cross correlation method for chemical profiles in minerals, with an application to zircons of the Kilgore Tuff (USA)
A cross correlation method for chemical profiles in minerals, with an application to zircons of the Kilgore Tuff (USA)
复制标题
矿物化学剖面互相关方法，应用于 Kilgore 凝灰岩锆石（美国）
DOI：
10.1007/s00410-018-1448-3
复制
发表时间：
2018
影响因子：
3.5
通讯作者：
L. Caricchi
中科院分区：
文献类型：
--
作者：
L. Probst;T. Sheldrake;M. Gander;G. Wallace;G. Simpson;L. Caricchi
岩浆晶体的特征是化学分区模式，反映了它们生长的岩浆库内的热和化学条件。表现出相似分区模式的晶体通常被解释为经历了相似的生长条件。这些分区模式可能代表连续过程（例如冷却）或更瞬时的事件（例如岩浆注入），并提供对岩浆系统在时间和空间上的结构和演化的深入了解。我们开发了一种算法，能够客观地量化不同样本的岩浆晶体组内部和之间的相似性。值得注意的是，该算法能够识别两个晶体内部之间发生的相关性，但不会延伸到边缘，这为了解岩浆系统的长期演化提供了机会。我们开发并解释了我们算法的数学基础，并使用来自 Kilgore 凝灰岩（美国）的锆石阴极发光图像介绍了其应用。这些结果使我们能够将相距超过 80 公里的两个不同露头的样本进行关联。
Magmatic crystals are characterised by chemical zonation patterns that reflect the thermal and chemical conditions within magma reservoirs in which they grew. Crystals that exhibit similar patterns of zonation are often interpreted to have experienced similar conditions of growth. These patterns of zonation may represent continuous processes such as cooling, or more instantaneous events such as magma injection, and provide an insight into the structure and evolution of a magmatic system, both temporally and spatially. We have developed an algorithm that is objectively able to quantify the similarity within and between suites of magmatic crystals from different samples. Significantly, the algorithm is able to identify correlation that occurs between the interiors of two crystals, but does not extend to the rim, which provides an opportunity to understand the long-term evolution of magmatic systems. We develop and explain the mathematical basis for our algorithm and introduce its application using cathodoluminescence images of zircons from the Kilgore Tuff (USA). The results allow us to correlate samples from two different outcrops that are found over 80 km apart.