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Atom Probe Tomography Analysis of Exsolved Mineral Phases
Published on: October 25, 2019
鲁结合物和石榴石宿主之间的方位关系的变化与岩生长区分有关
Victoria Kohn1, Thomas A Griffiths1, Taisia Alifirova1
1Department of Lithospheric Research, University of Vienna, Josef-Holaubek-Platz 2, Vienna, 1090 Austria.
石榴石中的鲁含有与石榴石生长区相关的形状和方向的变化. 这些微观结构的变化反映了 magma 分数结晶过程中融化成分的演变.
科学领域:
- 矿物学是什么?矿物学是什么?
- 石化学 石化学是一门学科.
- 地质化学 地质化学
背景情况:
- 石榴石和鲁石含有物提供了对地质过程的洞察力.
- 了解晶体导向关系 (COR) 是破译矿物质生长的关键.
- 来自珠性形质的阿尔曼丁-斯佩萨丁石榴石为岩演变提供了一个独特的窗口.
研究的目的:
- 为了研究石榴石在不同生长区内的鲁含量变化.
- 分析晶体定向关系 (COR) 和形状偏好方向 (SPO) 的鲁.
- 为了将鲁的微观结构特征与石榴石生长参数和融化成分相关联.
主要方法:
- 在石榴石核心和边缘区域中微结构分析鲁含有物.
- 基于轴关系的结晶学方向关系 (COR) 的识别和分组.
- 鲁 SPO与石榴石结晶学方向和增长部门的相关性.
主要成果:
- 在石榴石核心与边缘区域中,鲁含量表现出明显的SPO和COR.
- 石榴石核心鲁是沿Grt 111延长的,具有主导的COR组103R/111G.
- 石榴石边缘鲁石在Grt 100沿线显示出额外的延长,并增加了COR组001R/111G和001R/100G的丰度.
- 边缘的鲁提尔SPO与特定的石榴石生长部门 (Grt{112}) 和CORs相关.
- 鲁微结构的变化表明石榴石生长参数和融化成分的变化.
结论:
- 鲁含有物的微观结构和纹理是石榴石生长条件的敏感指标.
- 在COR组的变化反映了融或边界层在岩分数结晶过程中的组成变化.
- 这项研究突出了纳入微结构在重建石油生成过程中的实用性.
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