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The Ironwood Iron-Formation, part of the Gogebic Iron Range in Wisconsin, is a Paleoproterozoic Superior-type banded iron formation (BIF) with substantial iron resource potential. The development of a Mesoproterozoic contact metamorphic aureole related to the emplacement of the Mellen Intrusive Complex resulted in the production of a variety of silicate minerals in the western portion of the Ironwood Iron-Formation, including amphibole, pyroxene, and olivine. The presence of amphibole minerals, some of which occur in a fibrous habit, has complicated development of this resource due to potential human health impacts. This data release provides information related to amphibole and other minerals in order that commercial,...
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This dataset comprises photomicrographs from drill core and outcrop samples from the Ironwood Iron-Formation.
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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.
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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.
    map background search result map search result map Photomicrographs from the Ironwood Iron-Formation, Gogebic Iron Range, Wisconsin, USA Electron microprobe analyses of amphibole, pyroxene, and carbonate minerals from the Ironwood Iron-Formation, Gogebic Iron Range, Wisconsin, USA Scanning electron microscope (SEM) images from the Ironwood Iron-Formation, Gogebic Iron Range, Wisconsin, USA Energy-dispersive X-ray spectroscopy (EDS) analyses from the Ironwood Iron-Formation, Gogebic Iron Range, Wisconsin, USA Photomicrographs from the Ironwood Iron-Formation, Gogebic Iron Range, Wisconsin, USA Electron microprobe analyses of amphibole, pyroxene, and carbonate minerals from the Ironwood Iron-Formation, Gogebic Iron Range, Wisconsin, USA Scanning electron microscope (SEM) images from the Ironwood Iron-Formation, Gogebic Iron Range, Wisconsin, USA Energy-dispersive X-ray spectroscopy (EDS) analyses from the Ironwood Iron-Formation, Gogebic Iron Range, Wisconsin, USA