Fig. 24

Photomicrographs of fluid inclusion types found in quartz and adularia crystals from late-stage, D₄, veins from northern (a and b), central (c and d), and southern sites (e and f). Primary, two-phase H₂O-NaCl inclusions in quartz (a) and adularia (b) from the Kukutsu that display a negative crystal form. c and d show primary, three-phase H₂O–CO₂–NaCl inclusions in quartz from the central, Shoufeng River, site. One inclusion in c was locally decrepitated at 271 °C. Fluid inclusions in d show a planar fluid inclusion assemblage H₂O-CO₂–NaCl. e Linear fluid inclusion assemblage characterized by pseudosecondary three-phase H₂O–CO₂–NaCl inclusions from the southern, Xinwulu River, site. In f, also from the Xinwulu River site, planar fluid inclusion assemblages are characterized by pseudosecondary and sub-contemporaneous secondary two-phase, H₂O–NaCl inclusions