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.
基金
国家自然科学基金
国家教委博士点资金
关键词
早古生代
火山岩
构造环境
物质来源
Zhenghe of Fujian province
early Paleozoic volcanic rocks
tectonic environment
source of material
