Intragranular to xenolith-scale water heterogeneity in mantle olivine: Insights into cratonic processes

This data package contains a comprehensive set of materials related to our study on olivine water content in mantle xenoliths.

We have included scanned images of the double-polished thin sections used in our research, providing a visual reference for the samples analyzed. It's worth noting that the sample Kim-01-001 is an exception. Due to its fragmented nature, we were unable to obtain a successful scan of the entire thin section. Instead, we selected a small fragment from this sample to conduct a water content distribution visualization test on a single olivine grain.

A key component of this package is the FTIR-mapping folder, which contains a Matlab program we developed for calculating and visualizing olivine water content. The program's functionality is demonstrated using Kim-50-001 as an example. Additionally, the program automatically generates frequency histograms, offering further insights into the water content distribution.

For those interested in the crystallographic orientation of the olivine grains, we have provided a folder with EBSD data and visualization tools. This includes both the raw EBSD data and a Matlab code (which refers to the MTEX-toolbox) for generating inverse pole figures of individual olivine grains. As an example, users can reproduce the inverse pole figure of the olivine grain Kim-50-002-ol10.

To maintain methodological transparency and facilitate subsequent analyses, we have archived the electron probe microanalyzer (EPMA) data in a supplementary folder, which documents the quantitative mineral compositions determined through systematic point analyses of thin sections. Subsequently, we conducted pressure-temperature (P-T) estimations utilizing the automated calculation spreadsheet developed by Stachel, T. (2022) in "PTEXL - Geothermobarometry of Mantle Rocks, Borealis".

We believe this data package will be valuable for researchers seeking to verify our results, apply our methods to their own studies, or conduct further analyses on the samples we've examined. The combination of raw data, analysis tools, and example outputs should facilitate a deeper understanding of our methodology and findings regarding olivine water content and its implications for mantle processes. For access to data of other olivine grains beyond the examples provided here, please contact the corresponding author.

本数据包涵盖了我们针对地幔捕虏体中橄榄石含水量开展研究的全套综合资料。
我们收录了本研究中所用双面抛光薄片的扫描图像，可为所分析的样品提供可视化参照。需特别说明的是，样品Kim-01-001为特例：因该样品呈碎裂状态，我们未能获取其完整薄片的扫描图像，故从该样品中截取一小块碎片，针对单颗橄榄石颗粒开展了含水量分布可视化测试。
本数据包的核心组成部分为FTIR成像文件夹，其中包含我们自主开发的用于计算并可视化橄榄石含水量的Matlab程序，该程序以样品Kim-50-001为例展示了其功能。此外，该程序可自动生成频率直方图，为含水量分布特征提供进一步的分析视角。
针对关注橄榄石晶体取向的研究者，我们提供了包含电子背散射衍射（Electron Backscattered Diffraction, EBSD）数据与可视化工具的文件夹。该文件夹既包含原始EBSD数据，也包含基于MTEX工具箱开发的Matlab代码，用于生成单颗橄榄石颗粒的反极图。使用者可通过该代码复现样品Kim-50-002-ol10对应橄榄石颗粒的反极图。
为确保方法学透明度并便于后续研究开展，我们将电子探针显微分析仪（Electron Probe Microanalyzer, EPMA）数据归档至补充文件夹中，该文件夹记录了通过对薄片开展系统点位分析所得到的定量矿物组成。后续，我们借助Stachel, T.于2022年在"PTEXL - Geothermobarometry of Mantle Rocks, Borealis"中开发的自动化计算电子表格，开展了压力-温度（P-T）估算工作。
我们认为，本数据包可为旨在验证本研究结果、将本研究方法应用于自身研究，或对本研究分析过的样品开展进一步分析的研究者提供重要参考。原始数据、分析工具与示例结果的结合，将有助于研究者更深入地理解我们针对橄榄石含水量及其对地幔过程的启示所采用的研究方法与得出的结论。如需获取本示例之外的其他橄榄石颗粒相关数据，请联系通讯作者。