REE AND TRACE ELEMENT ANALYSES OF ASH USED BY THE ANCIENT ANDEAN CIVILIZATION OF TIWANAKU
In order to determine whether the ash was brought in from a single source or multiple sources, we chemically analyzed 13 samples collected from the Iwawi Project for Rare Earth Elements (REE) and trace elements. We used an Inductively Coupled Plasma Optical Emissions Spectrophotometer at UW Whitewater campus for our analyses. Preliminary results show that the ash samples contain Lu, Th, Yb, Sm, La, Nd, Ce, Y, and Sc, and that Th is very abundant in each sample. Also, Ce varies greatly between samples. Chondrite-normalized plots for REE indicate that sample 8 probably originated from a different source than the rest of the samples. In this poster we present the data from our chemical analyses and their archeological implications.