| 词汇 | example_english_asthenosphere |
| 释义 | Examples of asthenosphereThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. In continental rift settings, the emplacement of such large volumes of felsic melts requires a huge amount of mafic magma derived from uprising asthenosphere. Either of these mechanisms can cause the hot asthenosphere to rise close to the metasomatized lithosphere, initiating melting. In particular, is the source of within-plate basaltic magmas in an extensional setting the lithosphere, convecting asthenosphere or both? The extension of lithosphere accompanied with the upwelling of asthenosphere may be the key factor for the coeval magmas with different sources. We therefore favour the model whereby the eclogitic lower crust, together with the underlying lithospheric mantle, was delaminated, accompanied by asthenosphere upwelling. However, the contribution of asthenosphere to the generation of mafic magmatism would become ever greater along with the increase in extension of the lithosphere. The second chapter discusses the lithosphere and asthenosphere and the important role water plays in defining the brittle and ductile behaviour of the rocks in these regions. Temperatures high enough to produce basaltic partial melt in this decaying thermal anomaly would be located near the base of the lithosphere and in the immediately underlying asthenosphere. Several explanations have been proposed; a lower limit to the pliable asthenosphere, a phase transition, and most plausibly, depth-variation in the shear wave anisotropy. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It was found that the asthenosphere had invaded the overlying lithosphere. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Beneath the lithosphere is the asthenosphere, a relatively low-viscosity layer on which the lithosphere rides. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The upwelling of asthenosphere is not involved in the actual rifting process. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The upward flow of the asthenosphere results in decompression melting, magmatic underplating and some volcanism that may occur in the rift area. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This decreasing in seismic waves velocity from lithosphere to asthenosphere could be caused by the presence of small percentage of melt in the asthenosphere. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The steep dip angle of the subducting plate can correspond to a thicker wedge of asthenosphere and therefore a greater source of fertile mantle material. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A third type of basin exists along convergent plate boundaries - places where one tectonic plate moves under another into the asthenosphere. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This bulge is thought to be caused by upward convective forces in the asthenosphere pushing the oceanic crust and lithosphere. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The weakness of the asthenosphere allows the tectonic plates to move easily towards a subduction zone. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The further down it moves, the hotter it becomes, until finally melting altogether at the asthenosphere and inner mantle and the crust is actually destroyed. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The heat expelled by the magma expands the lithosphere and asthenosphere at the ridge, pushing them above the surrounding ocean floor. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The lithosphere is underlain by the asthenosphere, the weaker, hotter, and deeper part of the upper mantle. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Because of convection in the underlying plastic (although non-molten) upper mantle and asthenosphere, the lithosphere is broken into tectonic plates that move. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The crustal lithosphere is in unstable mechanical equilibrium because the underlying mantle lithosphere has a greater density than the asthenosphere. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. However, most scientists working today believe that the asthenosphere does not directly cause motion by the friction of such basal forces. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The plate which is being subducted (the plate going under), is floating on the asthenosphere and is pushed up and against the other plate. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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