OIB怎么记

Its contents are similar to those of EM ⅰ OIB from the Gough islands, and show ocean island alkaline basalt characteristics including the discriminant diagrams of tectonic settings for volcanics, which implies that the Hercynian volcanics were formed in tectonic environment of ocean island.

以其不相容元素比值，相当于Gough岛EMⅠOIB型洋岛玄武岩，其构造环境判别图进一步印证了海西期火山岩形成于洋岛碱性玄武岩环境。

Some of basic rocks contaminated by the crust materials could be formed by the AFC process, but the magma source are N-MORB compostion, rather than alkaline OIB or E-MORB compostions.

而受到地壳组分混染的基性岩，部分可能是通过AFC作用形成，但是其岩浆源非本研究中的碱性OIB或E-MORB样品，而是类似于N-MORB成分。

Based on more geochemical signatures, two types of basalt are recognized, namely, ocean island basalt ( OIB) and mid ocean ridge basalt ( MORB).

进一步的地球化学研究表明，这套玄武岩为洋岛型玄武岩（OIB）和洋中脊型玄武岩（MORB）的组合。