Supplement to Kutzschbach et al. 2026 "In situ Rb/Sr dating of potassium salt minerals (sylvite and carnallite) by 157 nm LA-ICP-MS/MS"

This is the supplementary data to Kutzschbach et al. 2026 "In situ Rb/Sr dating of potassium salt minerals (sylvite and carnallite) by 157 nm LA-ICP-MS/MS" The archive includes a supplementary PDF file with further information on the investigated sample materiel as well as an evaluation of precision and accuracy obtained for trace element concentrations and Sr isotope ratios. Figure S1 illustrates the location of the LA-ICP-MS/MS spots. For each sample, two images are shown: one displaying the spot IDs (corresponding to the numbering in Table S1) and one showing the corresponding single-spot Rb-Sr ages. Tables S1 with (1) Laser and ICP-MS/MS settings used for data acquisition (2) the chemical, isotopic and Rb-Sr age data of the single spots on samples and reference materials including sensitivity (cps) for 85Rb as well as the Sr-nuclides (3) per spot detection limits calculated following the approach of Longerich et al. (1996) (4) Isochron constructed using IsoplotR for the reference materials (5) a compilation of the systematic uncertainties considered for Rb-Sr age calculation (6) a table containing the ages and propagated uncertainties obtained for the reference materials (7) results of the precision and accuracy obtained for LA-ICP-MS/MS analyses of trace elements. Table S2 contains the Rb-Sr ages from the literature recalculated using the decay constant of Villa et al. (2015).