陕西平利石板沟火成岩含稀土矿物的特征  

Rare earth mineral characteristics of igneous rock in Shibangou,Pingli country,Shaanxi province

作　　者：安博博 尹京武 徐旸 高宇威 李烁隐 赵超 徐海明[2] 方景玲 AN Bo-bo;YIN Jing-wu;XU Yang;GAO Yu-wei;LI Shuo-yin;ZHAO Chao;XU Hai-ming;FANG Jing-ling(Institute of Earth Science, china University of Geosciences, Beijing 100083;Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037,China)

机构地区：[1]中国地质大学(北京)科学研究院,北京100083 [2]中国地质科学院矿产资源研究所,北京100037

出　　处：《电子显微学报》2017年第5期484-491,共8页Journal of Chinese Electron Microscopy Society

基　　金：铜金矿矿物组成资助项目(No.H87042)

摘　　要：石板沟位于陕西省平利县东南24公里,该区主要产出火成岩,通过电子探针对石板沟火成岩中含稀土矿物氟碳钙铈和直氟碳钙铈矿、独居石进行了较为系统的研究,氟碳钙铈矿和直氟碳钙铈矿是本次研究中首次被发现,在这些含稀土的矿物形成过程中,直氟碳钙铈矿首先形成,其次为氟碳钙铈矿,而独居石则最后形成。其化学组成揭示了热液是从高F,而稀土相对较少,富含Ca^(2+)和CO32-向高P和稀土,贫Ca^(2+)和CO32-的方向演化;三种矿物各自组分之间存在替代关系并且都具有强烈选择轻稀土的特点。Shibangou is located24kilometers southeast of Pingli County of Shaanxi Province,the igneous rocks are mainly distributed in the area.The monazite,parisite and synchisite in the igneous rocks of Shibangou are analyzed by EPMA.It is the first time to discover parisite and synchisite in this area.during the formation of these minerals,synchisiteis is first formed,followed by parisite,and monazite is finally formed.The chemical composition reveals that the hydrothermal fluid is evolved from the high F and the relatively few REE,rich in Ca2+and CO32-to high P and REE,depleted Ca2+and CO32-;There are substitution relationships between the three content of the mineral and show a characteristics of strongly enriched in LREE.

关 键 词：平利 火成岩 氟碳钙铈矿 直氟碳钙铈矿 独居石 电子探针 

分 类 号：P575[天文地球—矿物学] P618.7[天文地球—地质学]