摘要
中国萤石矿床分为产于花岗岩、火山岩及沉积岩中3种类型。萤石中稀土总量依上述顺序降低,LREE/HREE值依次增加。萤石的稀土配分与围岩相似。在Moller等图中,3种萤石处于不同的区域内,表明该类低温热液型萤石只与围岩岩性有关。在Barbier、Allegree以及 Moller等图中,所有沉积岩中的萤石都落入世界范围的沉积岩区,说明成矿作用与沉积作用密切相关。3种萤石中,不同的稀土含量具有不同的喇曼光谱、TL曲线和阴极射线发光光谱。
Fluorite deposits in China have been divided into three types and enriched in granites,volcanic and sedimentary rocks respectively. The REE abundance of fluorite decrease in the order of granite,volcanic rocks and sedimentary rocks, but LREE/HREE ratios of fluorite increase in the order of above mentioned rocks. The REE distribution is similar to that of the wall rocks. In the diagram of Moller,the three types of fluorite are located in different sections,showing that fluorite in epigenetic hydrothermal deposit is only related to the lithological properties of the wall rocks. In the diagrams of Moller,Bar-bier and Allegree,fluorite in all sedimentary rocks are located in the sedimentary scope in the world,showing that mineralization of fluorite deposit is closely related to the sedimentation. Different REE abundance in three types of fluorite has caused different Raman spectrum,TL curves and cathodoluminescent spectrum.
出处
《地质与勘探》
CAS
CSCD
北大核心
1997年第2期18-23,38,共7页
Geology and Exploration
基金
国家科技攻关攀登A30项目
国家重点基金"低温地球化学"课题
中科院长春物理所凝聚态物理开放室及中关村地区联合测试中心资助。
