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Supporting data for 'DFENS: Diffusion chronometry using Finite Elements and Nested Sampling'

Dataset title Supporting data for 'DFENS: Diffusion chronometry using Finite Elements and Nested Sampling'
Dataset creators Euan Mutch, University of Maryland
John Maclennan, University of Cambridge
Oliver Shorttle, University of Cambridge
John Rudge, University of Cambridge
David Neave, University of Manchester
Dataset theme Geoscientific Information
Dataset abstract

This is supporting data for the manuscript entitled 'DFENS: Diffusion chronometry using Finite Elements and Nested Sampling' by E. J. F. Mutch, J. Maclennan, O. Shorttle, J. F. Rudge and D. Neave.
Preprint here: https://doi.org/10.1002/essoar.10503709.1
Data Set S1. ds01.csv
Electron probe microanalysis (EPMA) profile data of olivine crystals used in this study. Standard deviations are averaged values of standard deviations from counting statistics and repeat measurements of secondary standards.
Data Set S2. ds02.csv
Plagioclase compositional profiles used in this study, including SIMS, EPMA and step scan data. Standard deviations for EPMA analyses are averaged values of standard deviations from counting statistics and repeat measurements of secondary standards. Standard deviations for SIMS and step scan analyses are based on analytical precision of secondary standards.
Data Set S3. ds03.csv
Angles between the EPMA profile and the main olivine crystallographic axes measured by electron backscatter diffraction (EBSD). 'angle100X' is the angle between the [100] crystallographic axis and the x direction of the EBSD map, 'angle100Y' is the angle between [100] crystallographic axis and the y direction of the EBSD map, and 'angle100Z' is the angle between the [100] crystallographic axis and the z direction in the EBSD map etc. 'angle100P' is the angle between the EPMA profile and the [100] crystallographic axis, 'angle010P' is the angle between the EPMA profile and the [010] crystallographic axis, and 'angle100P' is the angle between the EPMA profile and the [001] crystallographic axis. All angles are in degrees.
Data Set S4. ds04.csv
Median timescales and 1 sigma errors from the olivine crystals of this study. The +1 sigma (days) is the quantile value calculated at 0.841 (i.e. 0.5 + (0.6826 / 2)). The -1 sigma (days) is therefore the quantile calculated at approximately 0.158 (which is 1 - 0.841). The 2 sigma is basically the same but it is 0.5 + (0.95/2). The value quoted as the +1 sigma (error) is the difference between the upper 1 sigma quantile and the median. Likewise the -1 sigma (error) is the difference between the median and the lower 1 sigma quantile.
Data Set S5. ds05.xlsx
Median timescales and 1 sigma errors from the plagioclase crystals of this study. Results from each of the parameterisations of the Mg-in-plagioclase diffusion data are included: Faak et al, (2013), Van Orman et al., (2014) and a combined expression. Data Set S6. ds06.xlsx
Spreadsheet containing the regression parameters and covariance matrices used in this study and in Mutch et al. (2019). Additional versions of the olivine regressions where the ln fO2 is expressed in Pa have been made for completeness. We recommend using the versions where ln fO2 is expressed in its native form (bars).

Dataset content dates 01-OCT-14 to 26-JAN-21
Dataset spatial coverage Skuggafjöll, Bárðarbunga, Iceland
Sample location 63·968°N, 18·695°W
Dataset supply format csv, xlsx
Dataset language English-United Kingdom
Dataset discovery metadata record Discovery Link to the dataset's BGS Discovery Metadata record
Dataset publisher British Geological Survey
Dataset publication date 28th January 2021
Dataset digital object identifier(DOI) 10.5285/a27e4d59-1530-4901-9d87-67e171f24b56
Dataset citation text Mutch, E., Maclennan, J., Shorttle, O., Rudge, J., Neave, D. (2021): Supporting data for 'DFENS: Diffusion chronometry using Finite Elements and Nested Sampling. British Geological Survey. (Dataset). https://doi.org/10.5285/a27e4d59-1530-4901-9d87-67e171f24b56
Constraints and terms of use This data set is available under Open Government Licence, subject to the following acknowledgement accompanying any reproduced materials: "Contains data supplied by permission of the Natural Environment Research Council [YEAR]".
Access the dataset https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item161845