庐山星子群变质基性火山岩的地球化学特征及大地构造意义  

The geochemical characteristics of metamorphic basic volcanics from Xingzi Group, Lushan and the tectonic implications

作　　者：张海祥[1] 孙大中[1] 朱炳泉[1] 

机构地区：[1]中国科学院广州地球化学研究所,广州510640

出　　处：《岩石学报》1999年第3期372-378,共7页Acta Petrologica Sinica

基　　金：国家自然科学基金

摘　　要：通过对庐山星子群变质基性火山岩岩石学， 地球化学及其形成的大地构造环境的综合研究发现， 星子群变质基性火山岩具有岛弧拉斑玄武岩和洋中脊玄武岩的双重特征， 是扩张弧后 （或弧间） 盆地环境的产物。对比研究表明， 星子群既不是来源于华夏古陆的 “飞来峰”， 也不同于扬子古陆东南缘的四堡群， 冷家溪群， 它是一块独立的前寒武纪基底。Petrology, geochemistry and tectonic setting of metamorphic basic volcanics from Xingzi Group have been studied The results indicate that the geochemical characteristics of metamorphic basic volcanics from Xingzi Group are similar to those of arc tholeiites and MORBs They are from back arc or within arc spreading basin Xingzi Group isn't a 'nappe outlier' from Huaxia old land, it is different from Sibao Group, Lengjiaxi Group which are distributed southeast of Yangtze old land, too It is an independent Precambrian basement

关 键 词：星子群 变质基性火山岩 地球化学 火山岩 

分 类 号：P588.14[天文地球—岩石学] P588.3[天文地球—地质学]