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The role of GPR techniques in determining ice cave properties: Peña Castil ice cave, Picos de Europa

Abstract: The structure and ice content of ice caves are poorly understood. Ground penetrating radar (GPR) can provide useful insights but has only rarely been applied to ice caves. This paper interprets GPR images (radargrams) in terms of internal structure, stratification, compaction, thickness and volume of the ice block in the Peña Castil ice cave (Central Massif of Picos de Europa, northern Spain), providing the endokarst geometry of the ice cave in GPR data reflections. Eight radargrams were obtained by applying a shielded ground-coupled antenna with a nominal frequency of 400?MHz. Although the radargrams do not depict the ice?basal bedrock interface, they suggest that the ice block is at least 54?m deep and similarly thick. Some curved reflection signatures suggest a potential vertical displacement in the block of ice, and thus certain dynamics in the ice body. Other images show numerous interbedded clasts and thin sediment layers imaged as banded reflections. In this particular cave a direct visual inspection of the ice stratigraphy is a difficult task but GPR provides clear reflectivity patterns of some of its internal features, making GPR a suitable instrument for this and future studies to achieve a better and broader understanding of the internal behavior of ice caves.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Earth Surface Processes and Landforms, 2016, 41, 2177-2190

Editorial: John Wiley and Sons Ltd

 Año de publicación: 2016

Nº de páginas: 14

Tipo de publicación: Artículo de Revista

 DOI: 10.1002/esp.3976

ISSN: 0197-9337,1096-9837

Proyecto español: CGL2015-68144-R

Url de la publicación: https://doi.org/10.1002/esp.3976