| 词汇 | example_english_lithospheric |
| 释义 | Examples of lithosphericThese 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. Sea-floor spreading and continental drift were seen as involving these lithospheric plates rather than just oceanic or continental crust. The evidence, including that of xenoliths carried in the magmas, supports the idea of melting of old metasomatized lithospheric mantle, usually associated with rifting tectonics. An important consequence of this 'magmatic under plating' is that it reduces the density of the lithospheric column in which it is emplaced. An additional influence of lithospheric flexural stress caused by intrusive and volcanic loading cannot be ruled out, however. The second model involves derivation of the melts from a depleted lithospheric mantle source which was contaminated by subduction components. The break-off and detachment of the subducted oceanic slab and the accompanied upwelling of the deep asthenospheric mantle might lead to post-orogenic lithospheric extension. There is also little discussion of lithospheric scale modelling of the dynamics of mountain belts. Further east, however, two sets of observations support the existence of coeval lithospheric extension. The difference between this model and active rifting is that the convective upwelling is a consequence, not a cause, of lithospheric thinning and rifting. A certain degree of coherence should exist within the crust and between the crust and lithospheric mantle. Such melts thus preserve the best evidence for the composition of sub-continental lithospheric mantle, particularly for the origin of mantle enrichment. A 'heat flow province' may be regarded as a region with a certain mantle heat flow and a similar lithospheric thermal structure. Consequently, the lithospheric mantle was highly affected by an old continental component. Tracking changes in sub-continental lithospheric mantle through time. Lithospheric buoyancy and collisional orogenesis: subduction of oceanic plateaus, continental margins, island arcs, spreading ridges, and seamounts. In all, fifty-six contributors provide between them 23 papers that cover topics ranging from large-scale lithospheric structure to the origin of nitrate deposits. During the earlier extension stage immediately following the orogeny, some older enriched lithospheric mantle components might be incorporated into the depleted asthenospheric mantle. Inverted alkaline-tholeiitic sequences related to lithospheric thickness in the evolution of continental rifts and oceanic islands. Thus, the lithospheric mantle in the region was not strongly affected by old continental crustal components. We therefore favour the model whereby the eclogitic lower crust, together with the underlying lithospheric mantle, was delaminated, accompanied by asthenosphere upwelling. Our subsidence observations suggest that evidence for normal faulting is a consequence of minor stretching of the entire lithospheric plate. Does the lithospheric mantle play a major or a subsidiary role in orogenic processes? An inverse method for determining lithospheric strain rate variation on geological timescales. I would have liked a short comparative overview of heat flow characteristics and of subsidence rates relative to strain rate and initial crustal/lithospheric thicknesses. The role of lithospheric mantle in continental flood volcanism: thermal and geochemical constraints. The granitic magmas were generated and emplaced in a collage of diverse lithospheric segments and it is scarcely surprising that their origin has proved a difficult petrogenetic problem. Lithospheric thickness as a control on basalt geochemistry. An inverse model, based on finite-duration lithospheric stretching, has then been used to calculate the distribution of strain rate as a function of time required to fit each subsidence profile. If this is cor rect, the mantle enrichment may be produced by interaction of asthenospheric mantle-derived melts/fluids with lithospheric mantle, rather than by subduction-related processes. Constraints on the composition of the continental lithospheric mantle. Many petrogenetic models of flood basalts assume that production of potassic magma continues during the peak of tholeiitic magmatism and leads to mixing between lithospheric and asthenospheric melts. If ß and are treated separately in subsidence analysis then there is no need for local, upper-crustal, seismically resolvable extension factors to balance the overall lithospheric extension factor. Gradients in silicic magma chambers: implications for lithospheric magmatism. Neodymium isotopes in basalts of the southwest basin and range and lithospheric thinning during continental extension. Varying degrees of fluid input to mantle, which will affect the degree of melting, produce variable initial melt chemistry and differing amounts of assimilation from potentially diverse lithospheric reservoirs. He draws out well some general concepts that have been developed in the region, such as ter rane tectonics, sequence stratigraphy, core complexes and lithospheric flexure. On the one hand, lateral crustal or lithospheric heterogeneities are thought to control the lateral and vertical strain propagation, and thus the degree and modalities of vertical coupling. The parental magma was derived from melting of a long-term enriched sub-continental lithospheric mantle source as is indicated by the highly enriched isotopic signatures of the lamprophyres. Modes of continental lithospheric extension. The cooling rock exerts a force on spreading lithospheric plates, helping to drive their movements. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Lithospheric plates on either side of an active transform fault move in opposite directions; here, strike-slip activity occurs. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Far field stresses thin the crust and lithospheric mantle, and hot asthenospheric mantle passively enters the thinned area. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Lithospheric regions characterized by elevated heat flow are weak and extensional deformation can occur over a broad region. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Convergent boundaries create foreland basins through tectonic compression of oceanic and continental crust during lithospheric flexure. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Separation of lowermost crust and lithospheric mantle is controlled by the effective viscosity of the upper continental crust. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A trench marks the position at which the flexed, subducting slab begins to descend beneath another lithospheric slab. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Flexural rigidity is in itself, a function of the lithospheric mineral composition, thermal regime, and effective elastic thickness. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. To compensate for lithospheric thinning, asthenosphere upwells, melts due to adiabatic decompression, and derivative melts rise to the surface to erupt. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Lithospheric extension is attributed to processes related to plate tectonics. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. When the upper lithospheric crust experiences extensional pressures, the brittle crust fractures, creating detachment faults. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Volcanism thus occurs where the crust is easier to break up because it has been stretched by lithospheric extension, allowing melt to reach the surface. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Mantle flowing upward through the slab window in order to compensate for the decreased lithospheric volume can also produce decompression melting. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The kimberlite pipes in which the diamonds are found are closely associated with cratons, which provide the deep lithospheric mantle required to stabilize diamond as a mineral. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The other hypothesis postulates that it is not high temperature that causes the volcanism, but lithospheric extension that permits the passive rising of melt from shallow depths. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The asthenosphere rises until it comes into contact with the base of the lower crust, causing the lower crust and lithospheric mantle to start to peel away. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Lithospheric creation at the ridge is considered continuous and symmetrical as the new crust pushes the old crust laterally and equally on either side of the ridge. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. One of the most significant correlations found is that lithospheric plates attached to downgoing (subducting) plates move much faster than plates not attached to subducting plates. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. At that time it was suggested that lithospheric thinning generated volcanic activity, further increasing the magmatic processes at play such as intrusions and numerous small plumes. 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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