摘要
马衔山地层岩石含 F 量以元古界马衔山群为最高,平均含0.117%,是萤石成矿的矿源层.矿源岩为马衔山群混合岩及区域变质岩.按稀土模式及地化参数恢复混合岩及片岩的原岩为大陆裂谷拉斑玄武岩.由原岩演化成混合岩,经历过角闪岩局部熔融阶段.萤石和矿源岩具有相似稀土模式证实,萤石成矿物质来自矿源岩.
Stratigraphic strata of the highest F content in the Maxianshan areaare of Maxianshan group of Proterozoic era.The average value of F contentis 0.117%.Thus,Maxianshan group can be thought as the source bed offlourite metallogenetic elements.Source rocks are migmatite and regionalmetamorphic rocks.According to REE model and geochemical parameter,tholeiite can bereconstructed as primary rock of migmatite and schist,which was formedin continental rift-valley.The partial melting stage of hornblendite hasbeen experienced from primary rock to migmatite.REE of flourite andsource rocks are quite similar,which shows that metallogenetic material offluorite came from source rocks.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
1990年第1期85-92,共8页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金
关键词
萤石
层控矿床
含氟量
稀土元素
strata-bound fluorite deposits
source rocks
F content
rare-earth elements
tholeiite
