Active layer and permafrost thickness in rock glaciers derived from geophysical methods in the semiarid Andes of Argentina
- Villarroel, Cristian Daniel
- Forte, Ana Paula
- Ortiz, Diana Agostina
- Tamburini Beliveau, Guillermo
- Güell, Arturo
DOIAbstract
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 perma...
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