微量元素和同位素特征显示，玄武岩起源于与洋岛玄武岩源区相似的富集地幔源。
According to the characteristics of trace elements and isotope, the source of the basalt is similar to the OIB source.
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.
洋岛玄武岩以弄槐枕状熔岩为代表性火山岩，原为古特提斯洋盆中的夏威夷型洋岛，现保存在印支期前陆褶皱冲断带的一个外来岩席中。
The oceanic island basalt is represented by the Nonghuai pillow lava, which is, originally Hawaii type one in the Paleotethyan ocean, an allochthon in the Indosinian foreland fold and thrust belt.
岩石化学、球化学特征表明，该组火山岩属碱性玄武岩系列大西洋型(质类型)具洋岛特征。
It belong series of the alkaline basalt, and have character of island ocean in geochemistry and petrochemistry.
岩石化学、球化学特征表明，该组火山岩属碱性玄武岩系列大西洋型(质类型)具洋岛特征。
It belong series of the alkaline basalt, and have character of island ocean in geochemistry and petrochemistry.
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