Fig. 3 | Mineralium Deposita

Fig. 3

From: Chemical and physical heterogeneity within native gold: implications for the design of gold particle studies

Fig. 3

Surface characteristics of gold particles (detrital particles unless otherwise stated). a: Photograph of a gold nugget that is attached to quartz matrix (Eldorado Creek, Yukon). b: Photograph of bismuth telluride mineral (gray) on gold nugget surface (Revenue Creek, Yukon). c: Anthropogenic Au–Hg amalgam coating a placer gold particle (Davis Creek, Alaska, US). d: Bismuth-telluride altering to bismuth carbonate on the surface of detrital gold particle (Revenue Creek, Yukon, Canada). e: Clouds of fine-grained gold (white) in decomposed pyrite (shades of gray) in hypogene particle from Mackinnon Creek, Yukon). f: Gold particles that are 1–5 μm across in Fe-oxide matrix, adjacent to a placer particle (Nguiamatsia, Cameroon). g: Goethite (after pyrite) infilled by gold (Elatsite, Bulgaria). h: Deformed gold films, persisting after the decomposition and removal of pyrite (Sperrin Mountains, N. Ireland). i: SE image of surface deposits of pure Au on a placer gold particle from Sardis, Greece

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