Abstract
The elemental composition and depth profiles obtained by IBA techniques on some gilded-copper fragments from the Moche site of Loma Negra, in the Piura Valley, on the Northern Coast of Perú are presented in this article. A previous radiocarbon dating of a wooden fragment indicated that Loma Negra was occupied around 295 AD. A PIXE analysis using a 2.6MeV external proton beam, was used to obtain the concentration of trace elements in the samples. RBS analyses using 2.72MeV 4He+ and 12.0MeV 12C3+ were used to obtain the Au, Ag, Cu atomic profiles. NRA with a 1.02MeV deuteron beam was used to measure the oxygen and carbon concentrations through the 16O(d,p) 17O, 16O(d,α) 14N and 12C(d,p0) 13C reactions.
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