Triple-sulfur isotope data from schists and carbonates in the Eoarchean Isua Greenstone Belt (3.7 Ga), using a new leaching technique and a multi-collector ICP-MS. The results reveal distinct pattern between the two lithologies and demonstrate an atmospheric contribution of sulfur in both cases. This may support the notion that these rocks represent metamorphosed marine sediments. However, hydrothermal alteration needs to be assessed in more detail to verify the antiquity of these signatures.

The dataset consists of a table of 64 isotope ratio measurements of the AMES Ce standard (Willbold, 2007). The data was collected at Imperial College, London between April 2013 and March 2014 using a ThermoScientific Triton thermal-ionisation mass spectrometer following the technique described in Willbold, Journal of Analytical Atomic Spectrometry, 2007. The data is used to assess the reproducibility and accuracy of the mass spectrometric setup available at the time. Reference: Willbold, M., 2007. Determination of Ce isotopes by TIMS and MC-ICPMS and initiation of a new, homogeneous Ce isotopic reference material. Journal of Analytical Atomic Spectrometry, 22: 1364-1372 https://doi.org/10.1039/B705306A