... 大洋峡谷 oceanic canyon; 大洋玄武岩 oceanic basalt; 大洋沿海国 oceanic coastal state; ...
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大洋中脊玄武岩 MORB ; mid-ocean ridge basalt
大洋岛屿玄武岩 OIB
正常的大洋中脊玄武岩 normal mid-ocean ridge basalts ; N-MORB
大洋玄武岩中，元素之间常常存在线性关系。本文应用批式熔融模型，解释了这一现象。
On the basis of batch-type melting model, the author explains the linear relationships between elements which are often recognized in oceanic basalts.
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.
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).
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