名 称：磁铁矿石

矿物成分：矿石矿物以磁铁矿为主，其次为少量黄铁矿、磁黄铁矿及微量褐铁矿。脉石矿物以铁闪石、镁闪石和石英为主，其次有少量石榴石，极少量黑云母、金云母、绿泥石、榍石等。

成因类型：沉积变质型

成矿时代：太古代

主要用途：选冶铁的主要矿石原料。铁是钢铁工业的基本原料，广泛应用于国民经济的各个部门和人们日常生活的各个方面。

采集地点：内蒙古鄂托克旗棋盘井镇千里沟铁矿区

Name：Magnetite Ore

Mineralogy：Ore minerals dominated by magnetite, with subordinate pyrite, pyrrhotite, and trace amount of limonite. Gangue minerals include grunerite, tschermakite and quartz, with subordinate garnet, trace amount of biotite, phlogopite, chlorite, and sphene.

Ore genesis：Meta-sedimentary

Age：Archaean

Usage：For extracting iron. Iron is the elementary material for industry, and therefore is widely used in national economy and daily life.

Sample site：Qianligou iron mine, Qipanjing, Etuokeqi, Inner Mongolia.