RT Journal Article
T1 Caracterización de materiales volcánicos mediante técnicas geofísicas someras: 2. Georadar
T1 Characterization of volcanic materials using shallow geophysical techniques: 2. Ground penetrating radar
A1 Gómez Ortiz, David
A1 Martín Crespo, Tomás
A1 Martín Velázquez, Silvia
A1 Márquez, Álvaro
A1 Lillo, Francisco Javier
A1 López, Iván
A1 Carreño, Francisco
AB We have analyzed the ground penetrating radar (GPR) response in several volcanic materials (massive,pahoehoe and aa lava flows and airfall deposits) occurring in the Las Cañadas edifice (Tenerife, CanaryIslands), in order to recognize their occurrence and characterize their thickness, spatial distribution, internalstructures and discontinuities, as well as to evaluate the mean velocities of the electromagnetic waves inthese rocks and deposits. The obtained GPR profiles show that, depending on the nature of the materials,the geometry of the reflectors is distinctive. The GPR reflectors of airfall pumice are thin, well-layered andlaterally continuous. In contrast, different lava flows originate a different radar response. Regarding thepahoehoe lava flows, their radar signature is characterized by well defined reflectors. The aa lava flowsexhibit weak reflectors. Massive lava flows are resolved as homogeneous structures with scarce or absentinternal reflections. The mean velocity of the electromagnetic waves through the different deposits rangesfrom 0.07 to 0.099 m·ns-1. As a general approximation, the velocity of the electromagnetic waves is fasterin lava flows that in airfall deposits, where attenuation is greater and penetration depth is lower. Theestimation of the propagation velocity for the electromagnetic waves has allowed us to process the profilesand to carry out depth-time conversions and migration, in order to get more realistic 2-D representations
PB Sociedad Geológica de España
YR 2005
FD 2005
LK http://hdl.handle.net/10272/8698
UL http://hdl.handle.net/10272/8698
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026