福建政和早古生代火山岩系列的成因及物质来源研究  

Study of the formation and source material for early Paleozoic volcanic rockin Zhenghe,Fujian province

作　　者：陈汉林[1] 杨树锋[1] 武光海[1] 

机构地区：[1]浙江大学地球科学系

出　　处：《浙江大学学报（自然科学版）》1995年第4期513-522,共10页

基　　金：国家自然科学基金;国家教委博士点资金

摘　　要：作者利用岩石化学、地球化学等方法对福建政和地区早古生代火山岩系列进行综合研究．研究表明该火山岩产生于岛弧构造环境，是以岛弧拉斑玄武岩－钙碱性火山岩组合为特征的岛弧火山岩系列，并具有从拉斑系列向钙碱性系列演化的特征；该火山岩源于亏损地幔，并受到一定的陆壳物质混染．he authors study the early Paleozoic volcanic rock series systematically using the methods of petrology,petrochemistry,geochemistry,The results of study show that it is a thol elite(T H)-calc-alkali(CA)island -arc volcanic rcok series and was formed in early Paleozoic(Rb-Sr isotime age is 560. 8 ±14Ma).The evolutionary direction is from TH series to CA series.This island-arc volcanic rock series come from defic it mantle,which is mixed with crust material a little.The discovery of Zhenghe early Paleozoic lsland-arc volcanic rock series is very important for us to study the tectonic evolution in southeastern China.

关 键 词：早古生代 火山岩 构造环境 物质来源 

分 类 号：P588.14[天文地球—岩石学]