Genesis of the Zhijiadi Ag-Pb-Zn Deposit, Central North China Craton: Constraints from Fluid Inclusions and Stable Isotope Data

Table 1

Microthermometric data of fluid inclusions from different stages in the Zhijiadi Ag-Pb-Zn deposit.

Stages	Mineral	Type	Number	(°C)	(°C)	(°C)	(°C)	(°C)	Salinity (wt.% NaCl equiv.)	CO2 density (g/cm^3)	Bulk density (g/cm^3)
Early stage	Qz	C	4	to	5.5–6.8	25.6–29.2		294–298	6.1–8.3	0.65–0.70	0.98–1.00
		W	42				to	244–334	4.0–9.9		0.74–0.87
Main stage	Rds	W	80				to	188–298	3.2–12.7		0.77–1.08
	Fl	C	21	to	7.1–7.9	29.5–31.1		197–268	4.3–5.6	0.47–0.62	0.92–0.99
		W	17				to	194–278	0.5–8.3		0.82–0.91
	Sp	C	7	to	6.2–8.9	20.7–27.7		190–224	2.2–3.9	0.66–0.77	0.90–0.96
		W	23				to	164–245	2.2–9.1		0.86–0.96
Late stage	Fl	W	22				to	115–174	0.2–7.3		0.91–0.96
	Sp	W	14				to	111–152	1.7–8.8		0.94–0.99

W, aqueous inclusion; C, aqueous-carbonic inclusion; , melting temperature of solid CO₂; , temperature of CO₂-clathrate dissociation; , homogenization temperature of CO₂; , ice-melting temperature; , total homogenization temperature. All of fluid inclusions including W-type and C-type FIs homogenize into the liquid phase.