豫西南矽线石矿地质特征

豫西南地区是我国重要的高铝矿物资源产地，含矿层位为秦岭群。矽线石矿赋存于高温中压（部分低压）变质相系的一个特殊岩性组合──孔兹岩系中。矿床类型为区域变质型和接触变质型。区内矽线石矿产资源量大，采选条件较好，开发利用前景广阔。

GEOLOGICAL FEATURES OF SILLIMANITE DEPOSTIS IN SOUTHWESTERN HENAN

Southwestern Henan is an important source of high alumina minerals .The ore horizon is the Qinling Group. si1limanite deposits occur in a khondalite series--aspecial rock associa-tion of the high T-medium P（partly low P）metamorphic facies series. The deposits belongto the regional metamorphic type and the contact metamorphic type, In the area there are richsillimanite resources, better conditions for mining and benefication and vast prospects of ex-ploitation and utilization.