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Detection of undercover karst features by geophysics (ERT) Lascaux cave hill

hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorVERDET, Cecile
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorSIRIEIX, Colette
IDREF: 071604650
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorMARACHE, Antoine
IDREF: 13295267X
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorRISS, Joëlle
hal.structure.identifierMinistère de l'Agriculture, du Développement Rural et de la Pêche [Alger, Algérie]
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorPORTAIS, Jean-Christophe
dc.date.accessioned2021-05-14T09:30:33Z
dc.date.available2021-05-14T09:30:33Z
dc.date.issued2020-07
dc.identifier.issn0169-555X
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/75821
dc.description.abstractEnThe study of karst features under a detrital cover is difficult to obtain using punctual traditional tools. This paper presents a 3D geostatistical modeling of ERT (Electrical Resistivity Tomography) data to describe undercover karst features. A case study was carried out on the karstic site of the prehistoric decorated Lascaux cave (France). Geophysical measurements were used to define the limit between outcropping Coniacian or Santonian limestones (southwest) and clayey sands (northeast), with a main orientation of N140°. A geometrical description of the scarp was also constructed; pinnacles and notches were found under the clayey sand detrital formation. By combining 3D ERT with geomorphological and geological observations, the geometry of the stratigraphic limit between the Coniacian and Santonian limestone could be determined. This stratigraphic limit separates two domains, one is a potential aquifer, and acts as a feeder for the intermittent spring at the cave entrance, while the other is less permeable, resulting in a permeability contrast with the later rock type. All these observations help define the geological cave environment and ensure better protection for the paintings.
dc.language.isoen
dc.publisherElsevier
dc.subject.enKarstic morphology
dc.subject.enERT
dc.subject.enGeophysics
dc.subject.enGeostatistics model
dc.title.enDetection of undercover karst features by geophysics (ERT) Lascaux cave hill
dc.typeArticle de revue
dc.identifier.doi10.1016/j.geomorph.2020.107177
dc.subject.halSciences de l'ingénieur [physics]
bordeaux.journalGeomorphology
bordeaux.page1-13
bordeaux.volume360
bordeaux.hal.laboratoriesInstitut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.institutionCNRS
bordeaux.institutionINRAE
bordeaux.institutionArts et Métiers
bordeaux.peerReviewedoui
hal.identifierhal-03166947
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03166947v1
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