Analyses microchimiques par fluorescence X et autoradiographie appliquées aux dépôts de grotte : spéléothèmes, rythmites détritiques, glace et peintures rupestres
VANARA, Nathalie
Travaux et recherches archéologiques sur les cultures, les espaces et les sociétés [TRACES]
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Travaux et recherches archéologiques sur les cultures, les espaces et les sociétés [TRACES]
Language
en
Article de revue
This item was published in
Géomorphologie : relief, processus, environnement. 2011, vol. 17, n° 4, p. 407-426
Groupe français de géomorphologie (GFG) / Société d'Études pour le Développement Économique et Social (Sedes)
English Abstract
This article presents recent research on the sedimentary endokarstic infillings in connection with the new contributions of geochemicalanalysis by autoradiography and X-ray fluorescence (portable analyser, core scanner, ...Read more >
This article presents recent research on the sedimentary endokarstic infillings in connection with the new contributions of geochemicalanalysis by autoradiography and X-ray fluorescence (portable analyser, core scanner, micro-XRF, microprobe) in the context of the‘Climanthrope’ ANR programme. Coupled with sedimentological analysis (stratigraphy, laser grain size analysis, micromineralogy, andmicromorphology), geochemical analysis and imaging refine the study of underground deposits such as carbonated sediments(speleothems), rhythmites, subterranean ice, and prehistoric cave paintings. Formed following a seasonal cycle, stalagmites and rhythmites are likely to provide important data not only on the two main parameters of regional climate, i.e. hydrology and temperature, butalso on human impacts (speleothems in urban tunnels) and the rural environment. The microdebris and dusts sampled in subterraneanice record the palaeoenvironment by snow trapping. Parietal paintings can be studied directly with a portable XRF analyser withoutsampling. In every case, the notion of the ‘site effect’ is discussed for four French examples (Pyrenees, Aquitaine, Charente, Rhône)and three foreign examples (Italy, Chile, China).Read less <
Keywords
impact anthropique
géochimie
microprobe
geochemistry -- sédimentologie
dépôts de grotte
image géochimique
microsonde
autoradiographie
effet de site
English Keywords
XRF core scanner
micro-XRF
cave deposits
site effect
autoradiography
chemical imaging
sedimentology
human impact
Origin
Hal imported