大洋拉斑玄武岩

根据大量岩石化学分析结果及稀土元素配分模式判断，大部分属大洋拉斑玄武岩系列，部分为钙碱玄武岩系列。

On the basis of quantity calculation of petrochemistry data and from the judge of distributed model of rare-earth elements , these , rocks mainly belong to the oceanic tholeiite series and a part belongs to the lime-alkali series .

南带玄武岩除Y、Yb、Sc、Cr外，其他均富集，显示与大洋拉斑玄武岩曲线一致。

The basalt in the south zone belongs to tholeiite series , enriched in all the trace elements and REE except Y , Yb , Sc and Cr , showing its characteristics are consistent with those of oceanic tholeiite .

地球化学研究表明，其为典型的大洋拉斑玄武岩（MORB型玄武岩）。

The study of geochemistry indicates that these metabasic volcanic rocks are characterized with N-type MORB ( mid-ocean ridge basalt ) .

较合理地解释了结合带内，大洋拉斑玄武岩、洋岛玄武岩、大陆碱性玄武岩共存的地质特征。

Association of continental alkaline basalt with oceanic tholeiite and oceanic island basalt in the junction is reasonably interpreted .

基性火山岩具大洋拉斑玄武岩特征，常量元素和稀土元素显示陆间洋盆性质。

Geochemistry of major and rare-earth elements of the basic volcanic rocks indicates the features of an ocean basin between continents .

结果表明，该区的斜长角闪岩是由大洋拉斑玄武岩变质而成，变粒岩则是由酸性沉积岩变质而成。

It was shown that the amphibolite was transformed from oceanic tholeiitic basalts and the leptynite was converted from acidic sedimentary rocks .