Volcanic Minerals - Oregon State University
Greenstone belts are volcanic-sedimentary sequences, which include ultramafic rocks, dolerite, basalt, chert, sandstone, shale, tuff, banded iron-formation and other rock types. These rocks are very complex, having undergone metamorphism, folding, faulting, and shearing .volcanic rock and iron ore - bmon,Volcanic Rock And Iron Ore . Industry News. Kiruna Iron Ore Mine - Mining Technology. With an ore body 4km long, 80m thick and reaching a depth of 2km, LKAB's Kiruna is the world's largest, most modern underground iron ore mine.Iron Ore: Sedimentary Rock - Pictures, Definition & More,The primary use of iron ore is in the production of iron. Most of the iron produced is then used to make steel. Steel is used to make automobiles, locomotives, ships, beams used in buildings, furniture, paper clips, tools, reinforcing rods for concrete, bicycles, and thousands of other items.