涡旋理论与地球动力学的建模方法

Valentino Straser, A. Ferrari
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引用次数: 0

摘要

在含有亚圆形几何形状的活动构造区内的形态证据表明,这些几何形状可能是复杂断层平移动力学所描述的机制之外的结果。内力的力学,特别是对流的力学,还没有得到充分的解释。从地幔上涌而出的岩浆,其密度不同于在大气和水中向上流动的岩浆,在一定条件下,由于科里奥利力的作用,可以引发内生漩涡。旋涡在开始和上升阶段由于旋转而施加侧向力,打开了通往水面的道路,最终稳定了通道。与上升的线性流动相反,上升的线性流动会压紧覆盖的物质,抑制其激增,而涡旋流动则会从外部卸下物质,并将它们压紧在通道的侧向表面,使其更加规则和稳定。可以看到与火山、侧向斜坡和次圆形隆起有关的地表扭转运动。在火山口周围具有伪旋转形态的火山锥是另一种可能由涡旋动力学引起的现象。本文提出了一个涡旋理论模型,该模型可以从螺旋运动和岩浆上涌随时间稳定的角度解释地球动力学。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Modelling Approaches for Vortex Theory and Earth Dynamics
Morphological evidence in active tectonic areas containing subcircular geometries suggests that these geometries may be the result of mechanisms other than those described by translational dynamics of complex faults. The mechanics of endogenic forces, particularly convection currents, have not been fully explained.  Magma upwelling from the mantle, which differs in density from upward flows developing in the atmosphere and in water, can trigger endogenic vortexes under certain conditions and due to Coriolis Force.Vortexes apply lateral forces as a result of rotation at their onset and ascent phases, opening their way toward the surface and eventually stabilizing  the channel. In contrast to a rising linear flow, which compacts overlaying materials, inhibiting its surge, vortex flows unload materials from the outside and compact them on the channel's lateral surface, making it more regular and stable.Torsional movements on the surface associated with volcanites, lateral ramps, and subcircular elevations can be seen. Volcanic cones with pseudo-rotations in the morphologies surrounding the crater are another phenomenon that could be caused by vortex dynamics.We propose a model for a vortex theory in this paper, which could explain Earth dynamics in terms of spiralling movement and magma upwelling stabilizing  over time.
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