MSA Murchison Dataset

Abstract

Description of methods used for collection/generation of data: The data were obtained using a ThermoFisher MAT 253 dual inlet mass spectrometer and are the output data from the mass spectrometry software. The software calculates isotopic data and reports them in the delta notation from ion beam intensity ratios using standard sample standard bracketing. The extracts were prepared using protocols described in Labidi et al 2017 (https://doi.org/10.1016/j.gca.2016.09.036).

Methods for processing the data: The raw data are processed in the file by first renormalizing the data to sample gas from the international standard reference material IAEA S-1 and then converting this normalization to the Canyon Diablo Troilite Reference scale of Dottin et al 2023 (https://doi.org/10.1029/2022JE007597) using values reported in that paper.

Instrument- or software-specific information needed to interpret the data: MS Excel, or other software able to read .xlsx format

Standards and calibration information, if appropriate: See 2.

Environmental/experimental conditions:

Describe any quality-assurance procedures performed on the data: The mass spectrometry uncertainties are reported for each value. All values standardized against international standard reference material IAEA S-1 Canyon Diablo Troilite (CDT).

People involved with sample collection, processing, analysis and/or submission:

James Farquhar Amaury Bouyon