The relationship between surface kinematics and deformation of the whole lithosphere
The relationship between surface kinematics and deformation of the whole lithosphere
复制标题
地表运动学与整个岩石圈变形的关系
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
R. Bendick
中科院分区：
文献类型：
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作者：
L. Flesch;R. Bendick
岩石圈力学性质随深度的变化决定了地表变形与整个岩石圈变形的关系，进而决定了地表变形与整个岩石圈动力学的关系。在粘度（或弹性强度）是深度的连续函数的情况下，表面变形可用于约束力平衡和流变参数。在粘度是不连续的，但上地壳和地幔岩石圈有可比的最大值，表面变形可以用来近似力平衡和流变参数，但权衡意味着，应力和粘度的估计是有效的等效值，而不是实际值。在上地壳和地幔岩石圈之间的粘度是不连续的，并且相差超过一个数量级的地方，关于力平衡和流变学的信息都不存在于地表变形中，因此仅凭地表观测不足以估计岩石圈的动力学或力学状态。
The variation of mechanical properties with depth in the lithosphere determines the relationship between surface deformation and whole-lithosphere deformation, hence between surface deformation and whole-lithosphere dynamics. Where viscosity (or elastic strength) is a continuous function with depth, surface deformation can be used to constrain both force balance and rheological parameters. Where viscosity is discontinuous, but the upper crust and mantle lithosphere have comparable maximum values, surface deformation can be used to approximate force balance and rheological parameters, but tradeoffs mean that estimates of stress and viscosity are effective equivalent values rather than actual values. Where viscosity is both discontinuous and differs by much more than an order of magnitude between the upper crust and mantle lithosphere, information about both force balance and rheology are absent from the surface deformation, so surface observations alone are insufficient to estimate either the dynamic or mechanical state of the lithosphere.