RT Journal Article
T1 Geophysical Imaging of the Critical Zone along the Eastern Betic Shear Zone (EBSZ), SE Iberian Peninsula
A1 Handoyo, H.
A1 Alcalde, Juan
A1 DeFelipe, Irene
A1 Palomeras, Inmaculada
A1 Martín Banda, Raquel
A1 García Mayordomo, Julián
A1 Martí Linares, David
A1 Martínez Díaz, José Jesús
A1 Insua Arévalo, Juan Miguel
A1 Teixidó, T.
A1 Marzán, I.
A1 Carbonell, R.
AB The critical zone (CZ) represents the most-shallow subsurface, where the bio-, hydro-, and geospheres interact with anthropogenic activity. To characterize the thickness and lateral variations of the CZ, here we focus on the Eastern Betic Shear Zone (EBSZ), one of the most tectonically active regions in the Iberian Peninsula. Within the EBSZ, the Guadalentín Depression is a highly populated area with intensive agricultural activity, where the characterization of the CZ would provide valuable assets for land use management and seismic hazard assessments. To achieve this, we have conducted an interdisciplinary geophysical study along the eastern border of the Guadalentín Depression to characterize the CZ and the architecture of the shallow subsurface. The datasets used include Electrical Resistivity Tomography (ERT), first-arrival travel time seismic tomography, and multichannel analysis of surface waves (MASW). The geophysical datasets combined help to constrain the high-resolution structure of the subsurface and image active fault systems along four transects. The resulting geophysical models have allowed us to interpret the first ~150 m of the subsurface and has revealed: (i) the variable thickness of the CZ; (ii) the CZ relationship between the fault zone and topographic slope; and (iii) the differences in CZ thickness associated with the geological units. Our results provide a method for studying the shallow subsurface of active faults, complementing previous geological models based on paleo-seismological trenches, and can be used to improve the CZ assessment of tectonically active regions.
PB MDPI
SN 2076-3417
YR 2022
FD 2022-03-27
LK https://hdl.handle.net/20.500.14352/71398
UL https://hdl.handle.net/20.500.14352/71398
LA eng
NO Ministerio de Economía y Competitividad (MINECO)
NO GEO3BCN-CSIC
NO KEMDIKBUDRISTEK of the Republic of Indonesia
NO GIPP-GFZ
NO Seismic Unix CWP (Center for Wave Phenomena, Colorado School of Mines)
NO Lisbon University
DS Docta Complutense
RD 8 abr 2025