Chemical composition of small fragments of metals from Castillo de Huarmey (Peru): Chemical analysis in the micro-area using FE-SEM-EDS, FE-EMPA and XRD

摘要

Small metal fragments were found in the tomb of the Wari culture elite (Castillo de Huarmey, Peru). These objects were subjected to chemical analysis using a scanning electron microscope with energy-dispersive X-ray spectroscopy and field emission (FE-SEM-EDS), an electron microprobe analyser with field emission (FE-EMPA) and X-ray diffraction (XRD) analysis. Chemical composition analysis showed that four different alloys were used to make copper objects. Two different alloys were found in silver alloys. A comparative analysis was made of the artefacts of other cultures from the Middle Horizon Period. They differ in their chemical composition.