dc.contributor.author |
Díaz-Acha, Yael |
dc.contributor.author |
Campeny, Marc |
dc.contributor.author |
Casas, Lluís |
dc.contributor.author |
Di Febo, Roberta |
dc.contributor.author |
Ibáñez-Insa, Jordi |
dc.contributor.author |
Jawhari, Tariq |
dc.contributor.author |
Bosch, Josep |
dc.contributor.author |
Borrell, Ferran |
dc.contributor.author |
Jorge-villar, Susana Esther |
dc.contributor.author |
Greneche, Jean-Marc |
dc.contributor.author |
Tauler, Esperança |
dc.contributor.author |
Melgarejo, Joan Carles |
dc.date.accessioned |
2022-05-04T11:37:15Z |
dc.date.available |
2022-05-04T11:37:15Z |
dc.date.issued |
2022-03-17 |
dc.identifier.uri |
http://hdl.handle.net/2072/522243 |
dc.format.extent |
27 p. |
dc.language.iso |
eng |
dc.relation.ispartof |
Minerals, vol. 12, no. 3 (2022), 368 |
dc.rights |
L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by/4.0/ |
dc.rights |
© 2022 by the authors.
Licensee MDPI, Basel, Switzerland. |
dc.source |
RECERCAT (Dipòsit de la Recerca de Catalunya) |
dc.subject.other |
Gavà (Catalunya) |
dc.subject.other |
Jaciments minerals |
dc.subject.other |
Neolític |
dc.subject.other |
Variscita |
dc.subject.other |
Can Tintorer (Gavà, Catalunya : Jaciment arqueològic) |
dc.subject.other |
Espectroscòpia Raman |
dc.subject.other |
Turqueses |
dc.subject.other |
Pedres precioses |
dc.subject.other |
Fosfats |
dc.title |
Colours of gemmy phosphates from the Gavà neolithic mines (Catalonia, Spain): origin and archaeological significance |
dc.type |
info:eu-repo/semantics/article |
dc.type |
info:eu-repo/semantics/publishedVersion |
dc.subject.udc |
549 - Mineralogia |
dc.embargo.terms |
cap |
dc.identifier.doi |
10.3390/min12030368 |
dc.rights.accessLevel |
info:eu-repo/semantics/openAccess |
dc.description.abstract |
In the Neolithic Gavà mines, variscite and turquoise were exploited for ornaments manufacturing, although some prospective pits and tunnels were dug on other similar greenish minerals such as smectite or kandite. A 3D study of the distribution of mineral phases allows us to determine the parameters involved in variscite colours. Methods are comprised of quantitative colourimetry, thin section petrography, SEM-BSE-EDS, EMPA, XRD, Raman spectroscopy, and 57Fe Mössbauer spectrometry. Mapping of the mines indicates that colour is not directly dependent on depth. Although variscite from Gavà is poor in Cr3+ and V+3 compared with gemmy variscite from other localities, the deep green samples content has the highest values of Cr3+. In the case of cryptocrystalline mixtures with jarosite, phosphosiderite, or goethite, variscite tends to acquire a greenish brown to olivaceous hue. If white minerals such as quartz, kandite, crandallite, or alunite are involved in the mixtures, variscite and turquoise colours become paler. |