本文对河南许昌铁矿区的绿钠闪石的地质产状、物理性质、化学成分和成因等方面进行研究,并与我国鞍本、五台、舞阳等铁矿区的绿钠闪石进行对比,提出绿钠闪石主赋存于地台边缘的太古代绿岩带的一套海相中基性火-沉积-变质含铁岩系中,与鞍山式铁矿切伴生.因此,绿钠闪石可作为寻找前寒武纪沉积变质型磁铁矿床的-种标型矿物 In this paper, the geological occurrences, physical properties, chemical composition and genesis of the greensaphalite in the iron ore area in Xuchang, Henan Province are studied and compared with the green sillimanite in the iron mines in China such as Anshun, Wutai and Wuyang , Proposed that the main type of tephrite is hosted in a set of marine basic-fire-sedimentary-metamorphic iron-bearing rocks in the Archean greenstone belt at the edge of the platform and is associated with Anshan-type iron ore cuttings. Amphibole can be used as a mineral prospecting for sedimentary metamorphic magnetite deposits