Skarn is an old Swedish mining term originally used to describe a type of silicate gangue, or waste rock, associated with iron-ore bearing sulfide deposits apparently replacing Palaeoproterozoic age limestones in Sweden's Persberg mining district.
skarn |
Parts of the amphibole skarn and the iron ore are rish in Fluorite; this type of skarn is as much as a few feet thick and ranges from 20 to 60 percent fluorite.
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The mine has yielded several tens of thousands of tons of magnetite ore; associated with the magnetite ore are supergene hematite, vonsenite, Fluorite in dar mica skarn, pyroxeneamphibole skarn and quartz-bearing amphibole skarn.