摘要
卓潘、六合碱性岩体地属哀牢山-金沙江碱性岩带,由碱性辉长岩、正长岩和正长斑岩组成,岩石学分析表明,二者均属钾质碱性系列的岩石,具有富碱、高钾、高Ca及高K2O/Na2O的特征。岩石中赋存的辉石是透辉石和钙铁辉石,属钙质辉石,为非碱性暗色矿物。钙质辉石的出现与碱性岩的化学成分密切相关,正是由于岩石中高含量Ca的存在,导致了钙质辉石的产生。
Zhuopan,Liuhe alkali rocks composing of alkali gabbro,syenite and syenite porphyry,occurred in the Ailaoshan-Jinshajiang alkali rock belt.The research showed that both of the two rock bodies were characterized by alkali-rich,high K,high Ca and high K_2O/Na_2O,and belong to the potassic-alkali rock seires.The pyroxenes in the rocks were determined as calcic-pyroxenes,including diopside and hedenbergite.The appearance of calcic-pyroxenes was closely related to the petrochemical compositon.It was the high content of Ca resulted in the formation of calcic-pyroxenes.
出处
《矿物岩石》
CAS
CSCD
北大核心
2005年第2期15-19,共5页
Mineralogy and Petrology
基金
国家自然科学基金项目(No.40072022)
中国科学院知识创新工程项目(KZCXZ-SW-117)
关键词
辉石成分
岩石化学
钾质碱性岩
卓潘和六合
云南
pyroxenes pomposition
petrochemistry
potassic-alkali rocks
Zhuopan and Liuhe
Yunnan Province
