Genesis of the Early Indosinian Darongshan Granitoid in South China: Response to the Subduction of the Eastern Paleo-Tethys Ocean

Figure 4

Petrographic characteristics of hypersthene granite–porphyry samples from the Darongshan pluton: (a, b) photographs of quartz, K-feldspar, plagioclase, biotite, and garnet; (c, d) plagioclase develops polysynthetic twinning and a few weaker secondary changes; (e–h) plagioclase are encased in hypersthene. Mineral abbreviations: Q = quartz; Kfs = K-feldspar; Pl = plagioclase; Bt = biotite; Hy = hypersthene; Grt = garnet.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)