Fig. 10: Two ternary diagrams using SEM-EDS data (S1 table sheet 3).
From: Pirate gold provides new insights into West African trade using pXRF and SEM EDS analysis
The one on the right shows the influence of the elements gold, silver, and copper on coloration and marks the area (red rectangle) where the gold finds examined are located. In the left diagram, the Cu contents of the studied gold objects have been multiplied by 10 and the Au content divided by 10 to clearly show that the cast objects exceed the limit of the copper contents found in the Ashanti Gold Belt, while most of the gold is quite like the geological data. Ternary diagram data for gold hues by Metallos https://commons.wikimedia.org/wiki/File:Ag-Au-Cu-colours-english.svg.
