09/08/2018 · Searching for the volcanic origins of iron ore. by Adityarup "Rup" Chakravorty . Tuesday, July 3, 2018. To replie conditions inside magma chambers, samples were encapsulated in gold foil and subjected to temperatures up to 1,040 degrees Celsius and pressures up to a thousand times atmospheric pressure. Credit: ©Lennart A. Fischer. Most iron ore comes from sedimentary .
Iron ore from five hills contains more than % Fe. This is regarded as highgrade iron ore and compares well with other iron ores from the main iron ore producing nations. The silica and alumina contents of these ores are also below % and %, respectively, with correspondingly low levels of S (<%) and P (<%).