Spectroscopic characterisation of crusts interstratified with prehistoric paintings preserved in open-air rock art shelters
Antonio Hernanz, Juan F. Ruiz-López, Juan Manuel Madariaga, Egor Gavrilenko, Maite Maguregui, Silvia Fdez-Ortiz de Vallejuelo, Irantzu Martínez-Arkarazo, Ramiro Alloza-Izquierdo, Vicente Baldellou-Martínez, Ramón Viñas-Vallverdú, Albert Rubio i Mora, Àfrica Pitarch and Anastasia Giakoumaki
Article first published online: 3 JUL 2014 | DOI: 10.1002/jrs.4535
In situ micro-Raman spectroscopy (μ-RS) of rock paintings in open-air rock shelters entails difficulties that have been faced in five sites of the eastern Iberian Peninsula using a portable μ-Raman microscope and handheld energy dispersive X-ray fluorescence and diffuse reflectance infrared Fourier transform spectroscopy instruments. The microstratigraphic composition of crusts insterstratified with the paintings have been characterised by μ-RS and scanning electronic microscopy combined with energy dispersive X-ray spectroscopy. Whewellite, gypsum, calcite, clay, dolomite, α-quartz, anatase and haematite have been identified in the crusts and haematite and amorphous carbon in red and black pictographs, respectively.