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1·The rift valley over the axial part of an oceanic ridge is the accreting plate boundary.

洋脊中轴裂谷是板块的创生边界，是与地球内部联系最紧密的地表区域之一。

2·Geochemical characteristics of two types of gabbro suggest that their formation environment is an oceanic ridge of low spreading rate.

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。

3·The oceanic island is the exposed part of the undersea Macquarie Ridge, which is formed by the meeting of two tectonic plates.

它是海下麦夸里河山脉暴露出来的一部分，由两大构造板块碰撞形成。

4·They mainly formed at tectonic environment of the middle ridge of the oceanic plate, partial are the products of island arc and oceanic islands.

主要形成于大洋板块洋中脊构造环境，部分为岛弧一洋岛环境下的产物。

5·Its tectonic environment may be the spreading ridge of a small oceanic basin at the start.

其构造环境可能为小洋盆初始扩张时的扩张脊。

6·Tectonic environment of formation of enriched upper mantle is oceanic crust displacement from the oceanic mid-ridge to the orogenic zone.

造山带富集型上地幔形成的构造环境是：洋壳从扩张脊向两侧运移并最终拼入造山带这段时间内。