腾冲火山岩岩石化学研究  

THE PETROCHEMISTRY OF THE VOLCANIC ROCKS IN TENGCHONG

作　　者：向才英[1] 周真恒[1] 姜朝松[1] 

机构地区：[1]云南省地震局,云南昆明650041

出　　处：《云南地质》2000年第2期134-151,共18页Yunnan Geology

基　　金：云南省重大科技攻关项目!(85I0 30 8)

摘　　要：通过 154个全岩化学分析资料的综合研究 ,探讨了腾冲火山岩的岩石类型、化学成分特征和共生组合系列。第一期 (N2 )火山岩为高A1弱碱性—钙碱性橄榄玄武岩 (含少量安山岩 ) ;第二期 (Q1)为高K钙碱性安山—英安岩类 ;第三期 (Q3)为高A1高K弱碱性—钙碱性橄榄玄武岩—玄武安山岩 ;第四期 (Q4 )为高A1高K钙碱性安山岩—粗安岩。According to a comprehensive research of the data of 154 whole rock chemical analyses, the rock type, characteristics of the chemical composition and the paragenetic association series of the volcanic rocks in Tengchong have been studied in this paper. The volcanic rocks are the high Al alkalescent to calc alkali olivine basalts(including a little andesites) in the first period(N 2), the high K calc alkali andesites to dacites in the second period(Q 1), the high Al and high K alkalescent to calc alkali olivine basalts and basaltic andesites in the third period(Q 3) and the high Al and high K calc alkali andesites and trachyandesites in the fourth one (Q 4).

关 键 词：化学成分 火山岩 岩石化学 岩石成因 

分 类 号：P588.14[天文地球—岩石学] P584[天文地球—地质学]