Abstract The Argentinean Central Andes region (31°S to 35°S) exhibits one of the largest densities of rock glaciers on Earth. However, few studies have focused on the knowledge of the internal structure of these landforms. In the present paper, a characterization of the internal structure of two rock glaciers has been achieved by using Seismic Refraction Tomography and Vertical Electrical Sounding. In one of the rock glaciers, the thickness of the active layer is quite homogeneous, while in the other said thickness diminishes towards the front. In both rock glaciers, near the top of the active layer, the P-wave velocity values vary between 350 and 600 m/s, while in the bottom of the layer the P-values range from 800 to 1700 m/s. As regards the permafrost layer, it shows an irregular thickness with values varying between 4 and 27 m approximately. In addition, P-wave values ranging from 1600 to 3300 m/s and a few kΩm values of electrical resistivity have been recorded. The increase of geophysical surveys in rock glaciers in the Andes region is expected to give a better understanding of the characteristics, distribution and origin of the ice present in these landforms. It should also allow researchers to estimate with certainty their ice content as solid-state reserves.

中文翻译：

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阿根廷半干旱安第斯山脉地球物理方法得出的岩石冰川活动层和多年冻土厚度

摘要 阿根廷中部安第斯山脉地区（31°S 至 35°S）是地球上岩石冰川密度最大的地区之一。然而，很少有研究关注这些地貌内部结构的知识。在本文中，通过使用地震折射层析成像和垂直电测深已经实现了对两个岩石冰川内部结构的表征。在其中一个岩石冰川中，活动层的厚度非常均匀，而在另一个岩石冰川中，所述厚度朝前减小。在靠近活动层顶部的两个岩石冰川中，P 波速度值在 350 到 600 m/s 之间变化，而在层底部，P 值范围从 800 到 1700 m/s。至于永久冻土层，它显示出不规则的厚度，其值大约在 4 到 27 m 之间变化。此外，还记录了范围从 1600 到 3300 m/s 的 P 波值和几 kΩm 的电阻率值。安第斯山脉地区岩石冰川地球物理调查的增加有望更好地了解这些地貌中存在的冰的特征、分布和起源。它还应该允许研究人员确定地估计它们作为固态储量的冰含量。