Identification of Two Types of Metallogenic Fluids in the Ultra-Large Huize Pb–Zn Deposit, SW China

Figure 7

Photographs of adjacent rock alterations. (a) Dolomitization, coarse-grained structures are shown in the dolomites, (+)10 × 2. (b) Weakly dolomitized recrystallized sparitic limestone, in which the dolomites are present as euhedral-to-semieuhedral diamond-shaped crystals, and significant recrystallization is shown in the calcites, (−)10 × 2. (c) Pyritization, with the pyrites presented as euhedral-anhedral grains, (−)10 × 10. (d) Argillation, with the clay substances occurring as cryptocrystalline microflakes with grain sizes smaller than 0.02 mm and gaps interspersed between opaque minerals, (−)10 × 2. Sp: sphalerite; Py: pyrite; Dol: dolomite; Cal: calcite.

(a)

(b)

(c)

(d)