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artículo
Composition and thickness of gold and silver nose decorations from the tomb of the Lady of Cao determined by combining EDXRF-analysis and X-ray transmission measurements
Publicado por
Cesáreo, R., Gigante, G., Fabián, J., Zambrano, S., Franco, R., Fernández, A., Bustamente, A.
Publicado 2014 Enlace
Thirty four nose decorations from the tomb of the Lady of Cao has been analyzed by EDXRF-analysis and transmission measurements. These nose decorations are made partially on gold, and partially on silver. EDXRF-analysis showed that, while gold areas all show a similar composition, silver areas exhibit an erratic composition, and also an unusual high percentage of gold, up to 35 %. To verify that this erratic composition is not depending on surface enrichment processes, X-ray transmission measurements were carried out, which gives the bulk composition of the samples. These last measurements completely confirm EDXRF-results. Therefore the conclusion could be that a high quantity of gold was added intentionally to the silver alloys, for not clear reasons, may be to avoid the oxidation process typical of high concentration silver in silver alloys.
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2
artículo
Multilayered artifacts in the pre-Columbian metallurgy from the North of Peru Multilayered artifacts in the pre-Columbian metallurgy from the North of Peru
Publicado por
Cesareo, R, Bustamante, AD, Fabian, JS, Zambrano, SD, Alva, W, Chero, LZ, Espinoza, MCD, Rodriguez, RR, Seclen, MF, Gutierrez, FV, Levano, EB, Gonzales, JA, Rizzutto, MA, Poli, E, Calza, C, Dos Anjos, M, De Freitas, RP, Lopes, RT, Elera, C, Shimada, I, Curay, V, Castillo, MG, Gigante, GE, Ingo, GM, Lopes, F, Holmquist, U, Diestra, D
Publicado 2013 Enlace
This work was partially supported by a bilateral project between the Consiglio Nazionale delle Ricerche and Consejo Nacional de Ciencia, Tecnologia e Innovacion Tecnologica of Peru (CNR-CONCYTEC, 2009-2011 and 2012-2014). F. Lopes acknowledges CAPES for a 7 months grant at the University of Sassari.
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