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Mantle Flow and Determining Position of LAB Assuming Isostasy

机译:假设蛋白质的实验室的地幔流量和确定位置

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摘要

The assumption of isostatic equilibrium is often used in geophysics; e.g., the depth of the lithosphere-asthenosphere boundary (LAB) is determined using data regarding the gravity field and topography, together with the assumption of isostasy. However, isostasy implies a hydrostatic state, which is contrary to the mantle convection hypothesis, which states that most of the mantle matter is in motion. We therefore discuss herein the question of when the assumption of isostasy can be used. It is suggested that isostasy may be used for parts of oceanic plates (except for subduction zones, hotspots, and oceanic ridges) and for many continental regions (except for postglacial regions and regions of intensive volcanic or tectonic activity). Moreover, using the results of a numerical model of convection and calculations of dynamic topography, it is shown that some generalization of isostasy is possible in the form of deep dynamic isostasy (DDI). It is also indicated that, for some regions without isostatic equilibrium (e.g., postglacial regions), it is possible to use the isostatic method with some corrections to the results.
机译:等静态平衡的假设通常用于地球物理;例如,利用关于重力场和地形的数据确定岩石圈的深度(实验室),以及胰酱料的假设确定。然而,驻使意味着一种静水状态,其与地幔对流假设相反,这使得大多数地幔物质是运动。因此,我们在本文中讨论了可能使用雌超的假设。建议贻贝可用于海洋板的部分(外部悬胶区,热点和海洋山脊)和许多大陆地区(外掩抗区域和密集的火山或构造活动除外)。此外,使用对流的数值模型的结果和动态地形的计算,表明贻果的一些概括是可以的深动态蛋白酶(DDI)的形式。还表明,对于没有等静态平衡(例如,后凝块区域)的一些区域,可以使用对结果进行一些校正的等静压方法。

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