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Mineralogical Magazine; April 2004; v. 68; no. 2; p. 301-321; DOI: 10.1180/0026461046820188
© Mineralogical Society of Great Britain and Ireland

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FIG. 4. BSE images showing the habit and association of Bi-tellurides in Larga ores. (a) Association of tetradymite (Ttd) and tsumoite (Ts) as inclusions within arsenopyrite (Apy) in vein ores. Note curvilinear equilibrium boundary between the two Bi-minerals. Sample: 3M (Vein 37 at 625 m, 0 Vest gallery). (b) Association of sylvanite (Sy), native tellurium (Te) and tellurobismuthite (Tbs) within pyrite (Py). Sample: 3M (Vein 37 at 625 m, 0 Vest gallery). (c) Assemblage containing coexisting altaite (Alt) and galena (Gn), with minor hessite (Hs). Sample: 881 (skarn, Padina gallery). (d) Equilibrium association of tetradymite (Ttd) and tellurobismuthite (Tbs) in calcite (Cal) from skarn ores. Sample: 12P (skarn, Padina gallery). (e) Larger grain of tetradymite (Ttd) within calcite from skarn ores, containing exsolved galena (Gn). Sample: 12P (skarn, Padina gallery). (f) Narrow rim of tetradymite (Ttd) surrounding pyrite (Py) in calcite (Cal) from skarn ores. Gn: galena. Sample: 12P (skarn, Padina gallery).

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