Frictional behaviour of natural granite gouges at hydrothermal conditions with varied initial grain size

We performed friction experiments on granite gouge under hydrothermal conditions to investigate the roles of the various initial grain size on frictional properties of granitic faults in the continental crust. In this dataset, we report raw data and processed data after correction from the ring shear tests. In the same directory in which this documentation is located, 9 zip files are contained. Each zip file contains the following several text files that can be opened via visual studio code. The zip file named Uxxx (e.g. U973) is the experiment data of Ring shear tests. There are three text files in each zip file. Uxxx-T-σ_n^eff-Pf -f/c (e.g. U973-(25-300)-100-100-f) An Excel file with raw data (11 columns) continuously logged and created during an experiment. ‘f’ represents fine-grained, and ‘c’ represents coarse-grained. Uxxx_corrected (e.g. U973_corrected) A text file with 5 columns after processing the raw data in (a). The file has the following information Time [s] Shear displacement [mm] Effective normal stress [MPa] Friction coefficient [-] Shear stress [MPa]本研究针对热液环境下的花岗岩断层泥开展摩擦实验，旨在探究不同初始粒度对大陆地壳内花岗岩断层摩擦特性的影响作用。本数据集收录了环剪试验所得的原始数据与经校正处理后的数据。 本说明文档所在目录下共包含9个压缩包文件，每个压缩包内含若干可通过Visual Studio Code打开的文本文件。命名格式为Uxxx（例如U973）的压缩包，对应环剪试验的实验数据。 每个压缩包内包含3个文本文件： 1. Uxxx-T-σₙ^eff-Pf-f/c（例如U973-(25-300)-100-100-f）：该文件为实验过程中连续记录并生成的原始数据Excel文件，共包含11列。其中"f"代表细粒组分，"c"代表粗粒组分。 2. Uxxx_corrected（例如U973_corrected）：该文件为对前述第一个文件中的原始数据进行校正处理后得到的5列文本文件，包含以下信息： - 时间 [秒] - 剪切位移 [毫米] - 有效法向应力 [兆帕] - 摩擦系数 [无量纲] - 剪切应力 [兆帕]