This dataset comprises photomicrographs from drill core and outcrop samples from the Ironwood Iron-Formation in the Gogebic Iron Range, Wisconsin, USA.

This dataset comprises various energy-dispersive spectroscopy (EDS) analyses from drill core and outcrop samples in the Ironwood Iron-Formation, Gogebic Iron Range, Wisconsin, USA.

This dataset comprises various energy-dispersive spectroscopy (EDS) analyses from drill core and outcrop samples in the Ironwood Iron-Formation, Gogebic Iron Range, Wisconsin, USA.

This worksheet displays the results of X-ray diffraction (XRD) analyses of samples from the Ironwood Iron-Formation. Samples were analyzed using a PANalytical X'Pert Pro diffractometer using Co radiation and the results interpreted using Highscore Plus v.4.5. Mineral abundances were determined by Rietveld refinement.

These data comprise chemical analyses in weight percent of oxides, as well as chlorine and fluorine, conducted using a JEOL JXA-8900 electron microprobe analyzer (EPMA) on amphiboles, pyroxenes, and carbonates in the Ironwood Iron-Formation.

These data comprise chemical analyses in weight percent of oxides, as well as chlorine and fluorine, conducted using a JEOL JXA-8900 electron microprobe analyzer (EPMA) on amphiboles, pyroxenes, and carbonates in the Ironwood Iron-Formation.

This data release provides electron microprobe geochemical data that was collected as part of a scoping study to evaluate whether unconventional critical element resources may be associated with sediment-hosted copper systems in the Midcontinent Rift. We report abundances of trace elements in native copper and sulfide minerals in 12 thin sections from samples of the Mesoproterozoic lower Nonesuch Formation that were collected from underground exposures in the White Pine deposit. Approximately 350 spots were analyzed for Cu, Pb, Zn, Fe, Ni, Co, As, Sb, Ag, Hg, and S. The electron microprobe data were collected by personnel of the Central Region Minerals Program in Denver, Colorado, for the U.S. Geological Survey (USGS) Mineral Resources Program (MRP). An ASCII text file of results is provided in comma-separated by value (csv) format. The file has the name “White_Pine_EPMA_data.csv”.

This data release provides electron microprobe geochemical data that was collected as part of a scoping study to evaluate whether unconventional critical element resources may be associated with sediment-hosted copper systems in the Midcontinent Rift. We report abundances of trace elements in native copper and sulfide minerals in 12 thin sections from samples of the Mesoproterozoic lower Nonesuch Formation that were collected from underground exposures in the White Pine deposit. Approximately 350 spots were analyzed for Cu, Pb, Zn, Fe, Ni, Co, As, Sb, Ag, Hg, and S. The electron microprobe data were collected by personnel of the Central Region Minerals Program in Denver, Colorado, for the U.S. Geological Survey (USGS) Mineral Resources Program (MRP). An ASCII text file of results is provided in comma-separated by value (csv) format. The file has the name “White_Pine_EPMA_data.csv”.

These data represent the major, minor, and trace element compositions of modern and legacy iron and steel slag from the Chicago-Gary area of Illinois and Indiana, USA.