Page 508 - NEWGEN21-Proceedings-Full

Winu; vein paragenesis bismuth+ gold/ maldonite T <300°C

bismuth (melt) 1
T>300°C

σ 3 σ 3

H2S<<
Stage 2
Stage 1 H O+CO +HCL H2S<<
2
2
Si +K +Mo +W + AuCl chalcopyrite +
aq
aq
aq
aq
Bi+Au (melt) pyrite + sphalerite
bismuth+tellurobismuth+gold
T >300°C T<300°C
2

σ σ
σ 1 1 1

bismuthinite+gold

H2S< H2S>
Stage 3 Bi + Te + Au (melt) H O + CO + H S Stage 4
2
2
2
K + (H S) Cu +Fe +Zn +Pb aq
2
aq
aq
aq
aq