The oceanic plate is made of denser and heavier rock, so it begins to sink down under the continental plate and into the mantle.
海洋板块是由密度更大、更重的岩石构成的，所以它开始下沉到大陆板块之下，到地幔之中。
By 2011 scientists aboard a Japanese deep-sea drilling ship called Chikyu hope to start drilling through a thin piece of oceanic crust to reach Earth's mantle.
2011年，科学家们将登上日本一艘名为“地球号”的深海钻井船，他们希望通过钻开一块薄的大洋地壳到达地幔。
But geophysicists had thought that great subduction-zone earthquakes happened only where younger oceanic crust scrapes its way into the mantle.
但是在此之前，地球物理学者们认为，这种俯冲带大地震仅仅在年轻的海洋地壳挤入地幔处才可能发生。
Any hypothetic al force postulated to either push or pull oceanic plates would be quickly dissipated overcoming the friction of sliding over a static fluid mantle beneath.
任何假设的能推动或拉动大洋板块的力，会很快因克服在其下静态的热体地幔上滑动的摩擦力而被消散。
As podiform chromitite has stable physical and chemical properties, it has recorded the magmatic process of the mantle under the ocean spreading centre and the lateral movement of oceanic lithosphere.
豆荚状铬铁矿以其独特而稳定的物理化学特性，记录了大洋地幔深部岩浆活动(特别是扩张中心原始岩浆活动)以及大洋岩石圈运动过程。
The interplay between the two leads to the formations of fluid outer core, basalt magmas, oceanic crust, and differential rotation between the inner core and mantle.
这两者之间的相互作用导致了流体外核的形成、玄武岩浆的产生、洋壳的形成、以及内核和地幔之间的差异旋转运动。
The evidences indicate that the magmas are formed by melting of pyrolite and eclogite (ancient basaltic oceanic crust) in the axial zone of mantle plume.
这说明它们是在地幔柱轴部，由地幔岩和榴辉岩(古玄武质洋壳)组成的源区产生的岩浆形成的。
The existence of recycled basaltic oceanic crust in the axial zone of mantle plume may be the key of the formation of giant V-Ti-magnetite deposits.
岩浆源区再循环玄武质洋壳的存在可能是该区超大型钒钛磁铁矿床形成的根本原因。
Any hypothetical force postulated to either push or pull oceanic plates would be quickly dissipated overcoming the friction of sliding over a static fluid mantle beneath.
任何假设的能推动或拉动大洋板块的力，会很快因克服在其下静态的热体地幔上滑动的摩擦力而被消散。
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。
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。
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