黔西二叠纪玄武岩及岩浆来源初步分析  

THE RESEARCH ON THE PERMIAN BASALT AND ITS ORIGIN IN WEST PART OF GUIZHOU PROVINCE

作　　者：田景春[1] 尹观[1] 

机构地区：[1]成都地质学院,成都610059

出　　处：《矿物岩石》1992年第3期41-45,共5页Mineralogy and Petrology

摘　　要：本文以织金熊家场剖面为例进行岩石学及岩浆来源分析研究。岩性和岩石化学特征表明,区内玄武岩为碱性—钙碱性拉斑玄武岩。同位素地球化学和稀土元素分布模式研究资料表明,本区玄武岩原始岩浆来源于地壳和地幔二元组分相混合的体系。通过锶同位素组成的计算,显示了原始岩浆中的幔源和壳源二元组分的混合比例为5.4:1。There was a large area of basalt in Guizhou during the Permian period,which was tholeiite. From the isotopic geochemistry and the model of REE distribution analysis, it can be determined that the original magma was the result from partial crust with contamination of upper mantle. The calculation of Sr isotope component shows that the proportion of crust and mantle' s contribution to original magma was 5.4: 1

关 键 词：玄武岩 岩浆 来源 二叠纪 

分 类 号：P588.145[天文地球—岩石学]