High-grade iron ore deposits of the Mesabi Range, Minnesota; product of a continental-scale Proterozoic ground-water flow system

The Mesabi Range along the north edge of the Paleoproterozoic Penokean orogen in northern Minnesota has produced 3.6 billion metric tons of ore since its discovery in 1890. Of that amount, 2.3 billion metric tons were extracted from hematite-or goethite-rich deposits generally referred to as ores. T... View More