9 Ore Deposits and Economic Minerals – Mineralogy
We can use a triangular diagram to plot the compositions of copperiron sulfide minerals in the same way we plotted feldspar, pyroxene, and other silie compositions in Chapter 6. The small gray triangular diagram in the top of Figure depicts the CuFeS system. The blue region in the center of the triangle is where compositions of the most important ore minerals plot. The quadrilateral ...