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河北省某区接触交代型磁铁矿床与燕山期角闪闪长岩-闪长岩和闪长岩-二长岩两个岩石系列的中性侵入岩有成因联系。磁铁矿体主要赋存在这些侵入岩与中奥陶统碳酸盐岩的接触带中。与铁矿床的形成有密切联系的蚀变现象主要是钠长石化和矽卡岩化。本文仅就钠质交代作用予以较详尽论述,对矽卡岩化等顺便提到,不作赘述。矽卡岩化普遍
There is a genetic association between the contact metasomatized magnetite deposits in a certain area of Hebei Province and the neutral intrusions in the two rock series of the Yanshanian period amphibolites-diorites and diorites-dacites. Magnetite is mainly found in the contact zone between these intrusive rocks and the Middle Ordovician carbonate rocks. The alteration phenomena that are closely related to the formation of iron deposits are mainly albite and skarnization. This article deals only with the sodium metasomatism in more detail, and by the way of skarnization, we will not repeat them here. Skarnization is common