Development of transverse ridges on rock glaciers: field measurements and laboratory experiments
Development of transverse ridges on rock glaciers: field measurements and laboratory experiments
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岩石冰川横脊的形成：现场测量和实验室实验
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
M. Weber
中科院分区：
文献类型：
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作者：
Andreas Kääb;M. Weber
本文讨论了瑞士阿尔卑斯山脉murt<s:1>、Muragl和Suvretta岩石冰川横向脊变形的高分辨率摄影测量和大地测量结果。脊向下游平流，其速度等于在应用技术的显著性水平内匍匐多年冻土的总体速度。因此，任何山脊的形成过程都是叠加在岩体蠕变上的。事实上，测量结果显示，脊上的局部速度最大值可以用脊在压缩流作用下膨胀产生的微分运动来解释。这一假设与在使用黄原胶、沙子和砾石混合物的模型坡道上进行的实验室实验结果一致。还发现了逆冲作用与岩石冰川横向脊的发育有关的迹象。版权所有©2004 John Wiley & Sons， Ltd
Very high‐resolution photogrammetric and geodetic measurements about the deformation of transverse ridges on Murtèl, Muragl and Suvretta rock glaciers in the Swiss Alps are discussed. The ridges are advected downstreams with a speed that equals the overall speed of the creeping permafrost within the significance level of the applied techniques. Any process of ridge formation is, thus, overlain on the mass creep. In fact, measurements yield local speed maxima on top of the ridges that can be explained by differential movement due to ridge growth through bulging under compressive flow. This hypothesis is consistent with results from laboratory experiments that were performed on a model ramp employing mixtures of Xanthan Gum, sand and gravel. Indications were also found that overthrusting is involved in the development of transverse ridges on rock glaciers. Copyright © 2004 John Wiley & Sons, Ltd.