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Arsenopyrite constitutes the main gold-bearing mineral in various hydrothermal deposits since its average gold content may reach 1,000 to 2,000 ppm. However, arsenopyrite crystals exhibit heterogeneous gold contents covering a wide range from a few ppm to more than 1 percent. Gold distribution within crystals is relatively poorly known since the in situ analysis and Au mapping by standard analytic techniques is difficult at low Au contents. Since the knowledge of the Au distribution within crystals is of critical importance for ore exploration and beneficiation, a multidisciplinary approach using combined electron microprobe analysis, secondary ion mass spectrometry, atomic absorption,...

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