Calibrants: Name of calibration standard, matches values in Conditions table for each analyte, microprobe lab for the calibrant values, where the calibration standard was obtained, type of material, and elemental concentrations Conditions: Electron microprobe beam conditions, calibration standards, spectrometer assignment, diffraction crystal assignments, analysis order, counting times, and time-dependent intensity correction flag (Y/N) for each element RepeatUnkns: Microprobe session identifier to link analyses to a set of analytical conditions (usually used on multiple consecutive days) SecondaryStandardResults: Categorical identification of secondary standards, secondary standard name used in analysis runs, date and time of analysis, and element weight percents SecondaryStandardValues: Name of secondary standard used in analysis categorization, Y/N flag to indicate whether the standard is part of the traveling AVO standard mount, element reference values, and literature citations for standard reference values
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This article has been peer-reviewed and approved for publication consistent with USGS Fundamental Science Practices (pubs.usgs.gov/circ/1367). We appreciate reviews provided by Heather Lowers and Steve Kuehn, metadata review by Simone Montayne, and editorial handling by Kristen Janssen. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
The goal of this standard routine, and in comparing multi-year secondary standard results, is to ensure that data for unknown sample analyses is precise and comparable. This standard will enable us to correlate tephra units from Alaskan volcanos to better understand and detect changes in composition at a volcano over time.
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| Data format: | table in format csv |
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https://doi.org/10.14509/31045 |