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Título del libro: La Parure En Callaïs Du Néolithique Européen
Título del capítulo: The use of Raman spectroscopy in the characterization of variscite provenance: The Gavà case

Autores UNAM:
ANTONI CAMPRUBI CANO;
Autores externos:

Idioma:

Año de publicación:
2019
Palabras clave:

Microprobe; Raman; Supergene; Variscite; Veins


Resumen:

The Gavà phosphate deposit, mined during the Neolithic, was produced by weathering processes affecting primary apatite beds. It exhibits a neat vertical zoning, related to chemical gradients during weathering. Strengite, yellowish Al-rich strengite and ferroan variscite are found at the top, palegreen variscite at the intermediate levels, and green variscite in depth. Fe values are very low in the greenish samples, as well as Cr and V. Raman spectrums of the Gavà variscite show differences with samples from other occurrences worldwide. Moreover, some spectral differences can also be observed in the Raman spectra of variscite coming from different depths in the deposit. Raman spectroscopy can be an efficient tool to discriminate not only samples from different geographical localities, but also from its original position in a given deposit. © the individual authors and Archaeopress 2019. All rights reserved.


Entidades citadas de la UNAM: