Análisis no destructivo e in situ de minerales y pigmentos en cuevas mediante espectroscopia Raman

  1. Fernando Gázquez 1
  2. Fernando Rull 2
  3. José-María Calaforra 3
  4. Emilio Guirado 3
  5. Aurelio Sanz 2
  6. Jesús Medina 2
  7. Carmen de las Heras 4
  8. Alfredo Prada 4
  9. José Antonio Lasheras 4
  1. 1 Cambridge University
  2. 2 Unidad Asociada UVA-CSIC (ERICA) al Centro de Astrobiología, Universidad de Valladolid
  3. 3 Grupo de Recursos Hídricos y Geología Ambiental. Universidad de Almería
  4. 4 Museo de Altamira
Erakutsi afiliazioak +
Liburua:
Iberoamérica subterránea: CUEVATUR 2014, I Congreso Iberoamericano y V Congreso Español sobre Cuevas Turísticas
  1. Calaforra Chordi, José María (coord.)
  2. Durán Valsero, Juan José (coord.)

Argitaletxea: Asociación de Cuevas Turísticas Española ; Instituto Geológico y Minero de España

ISBN: 978-84-617-1908-2

Argitalpen urtea: 2014

Orrialdeak: 299-308

Biltzarra: Congreso Español sobre Cuevas Turísticas (5. 2014. Aracena)

Mota: Biltzar ekarpena

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Laburpena

Mineralogical studies in caves have usually required a first stage of sampling before analysis in laboratory. In fact, mineral gathering in caves can provoke irreparable damages. In the case of cave paintings, the threat of deterioration due to sampling is even more evident, given their cultural and historical value. Here, we explore the capability of portable Raman spectroscopy for the analysis of cave minerals and pigments in two emblematic Spanish caves, such as El Soplao Cave and Altamira Cave. This technique had enabled in situ and non-destructive analysis of peculiar speleothems in El Soplao Cave. Carbonate is the first mineral group in abundance, where calcite and aragonite are the most common minerals. In addition, other unusual minerals have been detected, such as hydromagnesite, as well as ferromanganese oxides in the black biogenic deposits recently discovered in this cave. Regarding Altamira Cave, we present here some preliminary results of the in situ Raman analyses performed on several pictorial features in the renowned “Painting Hall”. Hematite is the most abundant mineral, providing their characteristics ochre-reddish to the Altamira’s bisons and deers. The potential of Raman spectroscopy as an analytical technique compatible with cave preservations is particular remarkable in this case, since the analysis did not required of physical contact between the Raman head and the paintings. In summary, Raman spectroscopy emerges as an alternative methodology to the traditional sampling and gathering of material in caves.

Datuen iturria: Dialnet