Petrogenetic constraints on the formation of magmatic Ni-Cu-(Co) sulfide deposits in Proterozoic arcs

This dataset contains the complete geochemical and isotope data for the ~1.89 Ga Kylmäkoski and Stormi ultramafic–mafic intrusions of the Vammala Ni Belt, southwest Finland, which host magmatic Ni-Cu-(Co) sulfide mineralization related to the Svecofennian orogeny. It supports the manuscript "Petrogenetic constraints on the formation of magmatic Ni-Cu(-Co) sulfide deposits in Proterozoic arcs" (Hehn et al., submitted to Geochimica et Cosmochimica Acta). The sample material comprises 109 drill-core samples provided by the Geological Survey of Finland (GTK) and 11 outcrop samples, covering the mineralized peridotite, orbicular peridotite, pyroxenite, hornblendite, dunite and wehrlite cumulates as well as the surrounding dioritic to granitic country rocks. Sample coordinates are included. The data are organized as fifteen tables (A1 to A15): major and minor element compositions of silicate, oxide, sulfide and arsenide minerals by electron microprobe (JEOL JXA-8200, GeoZentrum Nordbayern, FAU Erlangen-Nürnberg); trace element compositions of the same silicate and sulfide phases by LA-ICP-MS/MS (Agilent 8900 with 193 nm excimer laser, TU Berlin); whole-rock major element data by energy-dispersive XRF and trace element data by LA-ICP-MS on fused glass beads; equilibrium melt compositions calculated from clinopyroxene trace element contents; sulfur isotope compositions (δ34S) of pyrrhotite and mixed sulfide separates by EA-IRMS (University of Münster); in situ oxygen isotope compositions (δ18O) of clinopyroxene by SIMS (Cameca 1280-HR, Helmholtz Centre for Geosciences, Potsdam); whole-rock Sr and Nd isotope compositions by MC-ICP-MS (Thermo Neptune), given as measured ratios and age-corrected to 1.89 Ga. Reference materials, analytical precision and accuracy, and limits of detection are reported with each table. A compilation of published data used for the comparison fields in the manuscript figures is also included. Also included are the sample locations of the drillcores and the field samples which can befound in tables L1 and L2.