名  称：磁铁矿石

矿物成分：矿石矿物以磁铁矿为主，其次为假象赤铁矿、半假象赤铁矿及褐铁矿。脉石矿物以铁闪石、镁闪石和石英为主，其次有少量、极少量黑云母、金云母、石榴石、黄铁矿、绿泥石、榍石等。

成因类型：沉积变质型铁矿

成矿时代：新太古代（距今大约25亿年）

主要用途：选冶铁的主要矿石原料。可冶炼生铁、熟铁、铁合金、碳素钢、合金钢、特种钢等。

采集地点：内蒙古达尔罕茂明安联合旗三合明铁矿区

Name：Magnetite Ore

Mineralogy：Ore minerals dominated by magnetite, which is followed by hematite and limonite. Gangue minerals include mostly iron iron-rich and magnesium-rich amphiboles, with subordinate and trace amount of biotite, phlogopite, garnet, pyrite , chlorite, sphene, etc.

Ore genesis：meta-sedimentsry

Age：Neoarchean（2.5 Ga）

Usage：Raw material for steel and iron industry. Used for producing  pig iron, wrought iron, carbon steel, alloy steel, special steel, etc.

Sample site：Sanheming iron mine, Daerhanmaomingan, Inner Mongoli.