RT info:eu-repo/semantics/article
T1 The mid‐latitude hydrolaccolith of the Spanish Central System (Southern Europe): A top‐to‐bottom integration of geomatic, geophysical and sedimentary datasets for characterising a singular periglacial landform
A1 Férnandez Lozano, Javier
A1 Turu, Valentí
A1 Carrasco, Rosa M.
A1 Soteres, Rodrigo L.
A1 Sánchez Vizcaíno, Jesús
A1 Karampaglidis, Theodoros
A1 Ros, Xavier
A1 Merlo, Oscar
A1 Pedraza, Javier
A2 Prospeccion e Investigacion Minera
K1 Ingeniería de minas
K1 Frost mound
K1 Geophysical and sedimentological record
K1 LiDAR
K1 Spanish Central System
K1 UAVs
K1 3318 Tecnología Minera
AB [EN] Permafrost study in the Spanish Central System ( 41 N) has remained elusive in pastdecades. Although numerous periglacial features have been described, none hasyielded conclusive information about the existence/distribution of permafrost acrossthese mountains. This work focuses on integrating light detection and ranging andunmanned aerial vehicle data with geophysical methods and sedimentary records,along with preliminary thermal information, for the comprehensive study of a frostmound. The singularity of this feature resides in its location, currently dominated bya seasonal frost regime, and its size reaching 59 m long, 22.5 m wide and 4 m high,representing the largest landform of this type in Iberia. From top-to-bottom, theinternal structure comprises three resistivity units (G1, G2 and G3). The most superficialunit (G1) consists of a sequence of burial soils alternating with sand and silts, withpebbles and gravel at the bottom, followed by a high porous layer that belongs to alandslide deposit (G2), likely composed of gravel and pebbles laying over unit G3(bedrock). Calibrated 14C ages suggest this landform formed at least  4300 yearsago during the mid-Holocene. Finally, the preliminary surface thermal map indicatesthe presence of sectors affected by strong thermal gradients likely driven by watertable variations. Our results conclude that the dynamics are primarily controlled bythe seasonal frost regime influencing local subsurface drainage, which allows us toclassify this landform as a hydrodynamic pingo-like structure. We also demonstratethat our approach is suitable for assessing the evolution of this type of periglaciallandform. Implementing long-lasting annual monitoring programmes would help tounderstand local periglacial dynamics better.
PB Wiley
SN 1085-3278
LK https://hdl.handle.net/10612/17699
UL https://hdl.handle.net/10612/17699
NO Fernández Lozano, J., Turu, V., Carrasco, R. M., Soteres, R. L., Sánchez Vizcaino, J., Karampaglidis, T., Ros, X., Merlo, O., & Pedraza, J. (2023). The mid-latitude hydrolaccolith of the Spanish Central System (Southern Europe): A top-to-bottom integration of geomatic, geophysical and sedimentary datasets for characterising a singular periglacial landform. Land Degradation & Development, 1–21. https://doi.org/10.1002/ldr.4968
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 26-jun-2024