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41个磁铁矿采自冀东早前寒武纪变质建造的贫矿(磁铁石英岩)、富矿和近矿围岩。与磁铁矿共生的主要矿物是石英、辉石、角闪石等。在这些磁铁矿的化学分析中,除了Fe_2O_3和FeO外,常有微量的Al_2O_3、TiO_2、V_2O_5、MgO、MnO、CaO。此外,还有少量的SiO_2,一般在0.20—1.65%之间,最高含量可达7.4%。这就提出了这些元素的赋存状态问题。即这些元素是以类质同象方式
41 magnetites were collected from the poor lean mines (magnetite quartzite), rich ore and near-mine rock that were previously metamorphosed in the eastern part of eastern Hebei. Magnesite and the main minerals symbiotic quartz, pyroxene, hornblend and so on. In the chemical analysis of these magnetites, there are usually traces of Al 2 O 3, TiO 2, V 2 O 5, MgO, MnO and CaO besides Fe 2 O 3 and FeO. In addition, a small amount of SiO 2, generally between 0.20-1.65%, the highest content of up to 7.4%. This raises the question of the state of occurrence of these elements. That is, these elements are based on the same type of image