印度洋脊是中大洋脊的一部分，中大洋脊是地壳分离的地球板块形成的。这一形成过程被称为海底扩张。
This is part of the system of mid-ocean ridges that form as the tectonic plates of the Earth's crust move apart-a process known as sea floor spreading.
不同的蛇绿岩剖面反映了洋脊之下不同的动力学过程，主要受板块扩张速度和岩浆供给的制约。
These different ophiolite sections actually reflect different dynamic processes beneath oceanic ridges, which are mainly controlled by the plate spreading velocity and the amount of magmatic supply.
两类辉长岩的地质地球化学特征表明它们可能形成于慢速扩张的洋脊环境。
Geochemical characteristics of two types of gabbro suggest that their formation environment is an oceanic ridge of low spreading rate.
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