This codebook.txt file was generated on 20211208 by Michael Sly ------------------- GENERAL INFORMATION ------------------- 1. Experimental Results of Nanoindentation on Granitic Feldspar and Quartz 2. Author Information Principal Investigator Contact Information Name: Michael K Sly Institution: Washington University in St. Louis Address: Email: msly@wustl.edu Associate or Co-investigator Contact Information Name: Katharine Padilla Institution: Washington University in St. Louis Address: Email: katharinepadilla@wustl.edu Associate or Co-investigator Contact Information Name: Philip Skemer Institution: Washington University in St. Louis Address: Email: pskemer@wustl.edu Associate or Co-investigator Contact Information Name: Katharine Flores Institution: Washington University in St. Louis Address: Email: floresk@wustl.edu 3. Date of data collection (single date, range, approximate date) 20190726 - 20210318 4. Geographic location of data collection (where was data collected?): Washington University in St. Louis 5. Information about funding sources that supported the collection of the data: NSF EAR 1726165 6. Contextual description of the data: A. Nanoindentation load-displacement curves (LC) produced using a Hysitron TI95 TriboIndenter on select grains in a sample of granite. B. Calculations of multiple physical properties (including indentation hardness, yield stress, and Young's modulus) of these samples based on the data from the LC files. C. The goodnesses of fit results (RMSE) for a grid search study for the flow law for low-temperature plasticity, and the parameter grids used to produce these. -------------------------- SHARING/ACCESS INFORMATION -------------------------- 1. Licenses/restrictions placed on the data: None 2. Links to publications that cite or use the data: Paper titled "Low-Temperature Rheology of Granitic Feldspar and Quartz" submitted to Earth and Planetary Science Letters 3. Links to other publicly accessible locations of the data: None 4. Links/relationships to ancillary data sets: None 5. Was data derived from another source? No If yes, list source(s): 6. Recommended citation for the data: Once published, cite the associated paper --------------------- DATA & FILE OVERVIEW --------------------- 1. File List A. Filename: Load-Displacement Curve file tree here Short description: The LC files follow this naming convention: Sample_Temperature_GrainNumber_IndentNumber LC.txt B. Filename: Granite.txt Short description: A table of important properties for each indent C. Filename: Grid Search file tree here Short description: An array of RMSE values for various grids The grid search files follow this naming convention: Model_Phase_rmse_FixedParameters.txt Model = the model used to determine yield stress Phase = Orthoclase, Plagioclase, or Quartz FixedParameters = the choice of flow law parameters p and q D. Filename A_matrix.txt Short description: The Array of values of the prefactor, A, used in the grid search (units: GPa^-2 s^-1) E. Filename: H_matrix.txt Short description: The array of values of the activation enthalpy, H, used in the grid search (units: kJ/mol) F. Filename: S_matrix.txt Short description: The array of values of the Peierls stress, sigma_p or S, used in the grid search (units: GPa) 2. Relationship between files: The values in files B are based on calculations done using the files in A. Each position in the files in C correspond to the same position in files D-F. 3. Additional related data collected that was not included in the current data package: None 4. Are there multiple versions of the dataset? No If yes, list versions: Name of file that was updated: i. Why was the file updated? ii. When was the file updated? Name of file that was updated: i. Why was the file updated? ii. When was the file updated? -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: The LC data were collected using a Hysitron TI95 TriboIndenter equipped with an xSol800 heating stage. The Hysitron software also calculates some of the data in the remaining files (e.g., hardness, reduced elastic modulus, contact area, and contact depth). 2. Methods for processing the data: The yield stress values in the Westerly_Granite*.txt files are calculated using MATLAB scripts that follow the relative models. The calculations of these and other variables are described in the paper. 3. Instrument- or software-specific information needed to interpret the data: None 4. Standards and calibration information, if appropriate: The contact area of the indenter probe tip is calibrated using a fused silica standard with well constrained indentation hardness and reduced elastic modulus. 5. Environmental/experimental conditions: Experiments were performed over a range of temperatures from room temperature (23°C) up to 500°C in 100°C increments with the exception of the first step from room temperature to 100°C. For experiments conducted at 300°C and higher, a mixture of argon and hydrogen was flowed over the sample to protect the samples and the instrument from oxidation. 6. Describe any quality-assurance procedures performed on the data: The LC curves were analyzed by hand and the curves that deviate significantly from the standard shape (with the exception of small pop-in events) were removed from further analysis and are not present in the submitted data. 7. People involved with sample collection, processing, analysis and/or submission: Michael K Sly, Katharine Padilla, Katharine Flores, and Philip Skemer ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: LC Files ----------------------------------------- 1. Number of variables: 5 2. Number of cases/rows: 3600 3. Missing data codes: 4. Variable List A. Name: Depth (nm) Description: Depth of the indenter probe tip in nanometers B. Name: Load (µN) Description: Load applied by the indenter probe tip in microNewtons C. Name: Time (s) Description: Time of the indentation experiment in seconds D. Name: Displacement Voltage (V) Description: Displacement of the indenter probe tip in volts from the indenter transducer E. Name: Force Voltage (V) Description: Force on the indenter probe tip in volts from the indenter transducer --------------------------------------------------- DATA-SPECIFIC INFORMATION FOR: Granite.txt --------------------------------------------------- 1. Number of variables: 29 2. Number of cases/rows: 2041 3. Missing data codes: NaN 4. Variable List A. Name: File Description: The name of the associated LC file B. Name: Phase Description: The phase associated with the indent (Plagioclase, Orthoclase, or Quartz). C. Name: Orientation Description: The approximate orientation of the grain associated with the indent without bars denoting the negative Miller directions. D. Name: Grain Description: The number of the grain associated with the indent (the first digit corresponds to the phase (2 = quartz, 3 = orthoclase, 4 = plagioclase). E. Name: GrainArea_um2 Description: The area of the grain associated with the indent in square microns. F. Name: phi1_rad Description: The first Euler angle for the orientation of the associated grain in radians. G. Name: Phi_rad Description: The second Euler angle for the orientation of the associated grain in radians. H. Name: phi2_rad Description: The second Euler angle for the orientation of the associated grain in radians. I. Name: T_K Description: Temperature in Kelvin. J. Name: sr_s Description: The calculated strain rate in inverse seconds. K. Name: H_GPa Description: The indentation hardness in gigapascals. L. Name: E_GPa Description: The calculated Young's modulus in gigapascals. M. Name: nu Description: The Poisson's ratio for the relevant phase. N. Name: n Description: The stress exponent used in the calculation of yield stress using the Ginder et al. (2018) method. O. Name: JY_GPa Description: The yield stress determined using the Johnson (1970) method in gigapascals. P. Name: JC Description: The constraint factor determined using the Johnson (1970) method. Q. Name: EGY_GPa Description: The yield stress determined using the Evans and Goetze (1979) method in gigapascals. R. Name: EGC Description: The constraint factor determined using the Evans and Goetze (1979) method. S. Name: MAR_GPa Description: The reference stress determined using the Mata and Alcala (2003) method in gigapascals. T. Name: MAC Description: The constraint factor determined using the Mata and Alcala (2003) method. U. Name: GNPY_GPa Description: The yield stress determined using the Gender et al. (2018) method in gigapascals. V. Name: GNPC Description: The constraint factor determined using the Gender et al. (2018) method. W. Name: Er_GPa Description: The reduced elastic modulus in gigapascals. X. Name: hc_nm Description: The contact depth in nanometers. Y. Name: Pmax_uN Description: The maximum load in micronewtons. Y. Name: S_uN_nm Description: The curvature of the unloading portion of the LC curve in microNewtons per nanometers. AA. Name: A_nm2 Description: The contact area in square nanometers. AB. Name: hmax_nm Description: The maximum indentation depth in nanometers. AC. Name: heff_nm Description: The effective indentation depth in nanometers.