Fig. 9: Binary plots showing elemental compositions obtained by SEM-EDS.
From: Pirate gold provides new insights into West African trade using pXRF and SEM EDS analysis

A Au vs. Ag content, B Au vs. Cu content, C Ag vs. Cu content, D Fe vs. Cu content. Data for the Ashanti belt mining areas of Bogosu, Prestea and Obuasi have been added for comparison. The data used can be found in the supplementary material (S1 table sheet 3). Data for Bogosu and Prestea70, Obuasi71. All Data reduced to Au+Ag+Cu=100, except D.