PIXE ELEMENTAL ANALYSIS OF SOUTH-AMERICAN MUMMY HAIR

Hair samples were obtained from ten mummies of the archaic and formati ve cultures of the north coast of Chile. Each sample was divided into two portions. One portion was washed in acetone and then water and the second portion remained unwashed. All samples were then prepared by a n acid digestion procedure and analyzed by PIXE. The washed and unwash ed samples were compared to determine what elements were present in th e material on the hair surface. Concentrations of the elements Ca, Ti, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Sr, and Pb are reported. Comparison w as made to previously published elemental analyses of mummy hair and m odem hair. One sample, which had a reddish hue, was found to contain u nusually large quantities of Fe and As. Since the unwashed sample had much higher concentrations of these elements than the washed sample, i t is believed that the reddish color originated in a mineral dye appli ed to the hair.