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1976年在我国辽宁省太古代变质铁矿中首次发现了一种新的铁硅酸盐,被命名为莱河矿。许多作者对它进行过研究。本文作者在河北省变质岩中发现了另一种在化学成分上与莱河矿有差异的高铁铁橄榄石,它产在一种特殊的石英铁榴易溶岩中,后者主要由易溶石和铁铝榴石组成,还含有少量石英、磁铁矿和单斜辉石,局部富含高铁铁橄榄石、石墨和黑云母。这种岩石作为夹层产在太古代迁西群变质岩中,上下围岩分别为蓝晶石石榴子石斜长片麻岩和二辉石麻粒岩。
In 1976, a new ferrosilicate was first discovered in Archean metamorphic iron ore of Liaoning Province in China, and named as Laihe Mine. Many authors have studied it. In this paper, the authors found another high-iron feldspar in the metamorphic rocks of Hebei Province that is different in chemical composition from that of the Laihe Mine. It is produced in a special type of quartz dacite lava that is mainly composed of easily soluble rocks and Almandine composition, also contains a small amount of quartz, magnetite and clinopyroxene, locally rich in high-speed iron fayalite, graphite and biotite. This kind of rock is produced as a mezzanine in the Archean Qianxi Group metamorphic rocks. The upper and lower wall rocks are kyanite garnet gneiss and dipshanalite, respectively.