浙东南岩头地区磨石山群火山岩岩石地球化学研究  

Geochemical study on volcanic rocks of the Moshishan Groupin Yantou region of southeast Zhejiang

作　　者：顾明光[1] 

机构地区：[1]中国地质大学研究生院

出　　处：《华南地质与矿产》2003年第4期24-30,共7页Geology and Mineral Resources of South China

基　　金：浙江省国土资源厅"1:5万田市幅;岩头镇幅区域地质调查项目"

摘　　要：岩头地区隶属于中国东南大陆火山岩带,广泛发育早中生代磨石山群陆相火山岩系。对该套火山岩的岩石地球化学进行了系统研究,认为其属高钾钙碱性岩系,岩石组合类型为(粗安岩)-石英粗安岩-流纹岩;推断其成因类型具有S-I过渡型的特征,岩浆物质来源于中下地壳的部分熔融,形成于活动大陆边缘构造环境。The Yantou region of southeast Zhejiang is located in the southeast China continental volcanic zone where widely developed the early Mesozoic continental facies volcanic rocks(Moshishan Group).Based on systematical geochemical research,It is believed that the volcanic rocks are high potassium calc-alkalic rock series,belonge to(latite)-quartz latite-rhyolite assemblage and show the transition characteristics of S-type and I-type volcanic rocks,and might be derived from partial melting of the mid-lower crust in an active continental margin.

关 键 词：磨石山群 地球化学 成因类型 活动大陆边缘 浙东南岩头地区 火山岩 

分 类 号：P588.14[天文地球—岩石学]