Quartz EBSD data used for piezometer calculations

Electron backscatter diffraction (EBSD) data were acquired from two thin sections of quartz veins which deformed in metapelite at greenschist facies conditions, and metabasalt at epidote-blueschist facies conditions.  The dynamically recrystalised quartz grain size, quantified using the EBSD data, forms the basis of our estimates of the strength of oceanic crust during subduction at greenschist to epidote-blueschist facies conditions.

The data were collected using a Zeiss Sigma HD Field Emission Gun Analytical Scanning Electron Microscope at the Electron Microbeam facility in the School of Earth and Ocean Sciences at Cardiff University.
The dataset provided here includes two Channel 5 text files, one for each thin section. The data may be interpreted using the freely available MTEX software, available on GitHub (https://mtex-toolbox.github.io/). The file "inland_Makimine_quartz.ctf " contains the data for the greenschist facies stress estimate, while NMR_quartz_in_amphibolite.ctf contains the data for the epidote-blueschist facies stress estimate.
In the textfiles the data are arranged in the following columns, from left to right:  Mineral phase, X Position, Y Position, number of Kikuchi bands, 3 columns of Euler rotations, the mean angular distortion, band contrast, band slope.

Research results based upon these data are published at http://doi.org/10.1126/sciadv.aba1529

电子背散射衍射（Electron backscatter diffraction, EBSD）数据采自两块石英脉薄片，这些石英脉分别在绿片岩相条件下的变质泥岩、以及绿帘蓝片岩相条件下的变质玄武岩中发生了塑性变形。研究人员通过EBSD数据量化得到动态再结晶石英晶粒尺寸，以此为基础估算了绿片岩相至绿帘蓝片岩相条件下俯冲过程中洋壳的力学强度。

本数据集的数据由卡迪夫大学地球与海洋科学学院电子微束实验室的Zeiss Sigma HD场发射枪分析型扫描电子显微镜采集获得。

本次公开的数据集包含两个Channel 5格式文本文件，分别对应前述两块薄片。数据可通过GitHub平台上免费开源的MTEX软件进行解析处理（https://mtex-toolbox.github.io/）。其中文件"inland_Makimine_quartz.ctf"包含绿片岩相应力估算所需数据，而"NMR_quartz_in_amphibolite.ctf"则包含绿帘蓝片岩相应力估算所需数据。

文本文件内的数据按从左至右的顺序依次包含以下列：矿物相、X坐标、Y坐标、菊池带（Kikuchi bands）数量、3组欧拉旋转参数、平均角度畸变、花样衬度以及带斜率。

基于本数据集的研究成果已发表于http://doi.org/10.1126/sciadv.aba1529