宜昌老林沟石榴石矿床地质特征  

THE GEOLOGICAL CHARACTERS OF LAOLINGOU GARNET ORE DEPOSIT IN YI CHANG

作　　者：刘云勇[1] 

机构地区：[1]中南冶金地质研究所,湖北宜昌443003

出　　处：《化工矿产地质》2004年第1期23-28,共6页Geology of Chemical Minerals

摘　　要：老林沟石榴石矿产于黄陵背斜北部类孔兹岩系中一套富铝铁质正常沉积的泥质粉砂岩、泥质岩中,在区域热动力变质作用下,铁铝榴石与夕线石共生,属于巴罗变质系列中夕线石带产物,根据矿物共生组合、指相特征矿物得出形成该矿产的区域变质的温压条件为:t为7 00℃,P为7 30MPa,变质相属低角闪岩相至高角闪岩相。Laolingou garnet exist a set of pelitic siltstones and pelitic stones deposited normally that belong to iso-Khondalite series on the north of Huang Ling anticline and that include rich aluminum and iron components. Almandine and sillimanite paragenerate that are products of sillimanite because of regional metamorphic process, which belong to iso-Barrovian metamorphic series. According to mineral paragenesis association and facies minerals, we can deduce that the regional metamorphic process that leads to the mineral matches the following conditions: the temperature is 700℃, the pressure is 730MPa , metamorphic facies ranges from low-amphibolite facies to high-amphibolite facies.

关 键 词：石榴石 矿床地质 泥质粉砂岩 泥质岩 热动力变质作用 矿物共生组合 变质相 

分 类 号：P619.244[天文地球—矿床学]