Application for beam time at ESRF – Experimental Method : Opal coating caracterization in rock art context
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27 août 2022
- ISIDORE Id: 10670/1.03d895...
- halshs: halshs-04830795
http://creativecommons.org/licenses/by-nc-nd/ , info:eu-repo/semantics/OpenAccess
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Opal Synchrotron Pigment Rock artSujets proches
Western art (Western countries) Fine arts Iconography Arts, Fine Art, Occidental Arts, Visual Visual arts Occidental art Art, Visual Art, Western (Western countries) ArtsCiter ce document
Claire Chanteraud et al., « Application for beam time at ESRF – Experimental Method : Opal coating caracterization in rock art context », HAL SHS (Sciences de l’Homme et de la Société), ID : 10670/1.03d895...
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Résumé
Silica coatings development on rock art walls discovered at the Points rock art Cave (Grotte aux Points) in the South East of France, open up new questions on analytical strategy when studying pictorial matter in caves (access to geochemistry and petrography), rock art conservation and dating. To date classical in situ and in laboratory spectroscopic techniques appear unsuccessful or limited to identify structures and geochemistry of silica coatings, which also prevents pigment characterization. This project proposes to perform XRD/PDF-CT to access both structure and geochemistry of the silica coating to determine the opal type and to characterize the interaction between pigments and opal coating to understand the role (positive or negative) of silica coating in the preservation of rock art in caves. Thus, by developing a specific and non-destructive characterization method for opal coatings, this project opens up a new approach for the study of decorated wall taphonomy and proposes utilizing mineralization both as markers of the natural history of caves and as an indication for their occupation by ancient human groups.
