Fluid Evolution of Fuzishan Skarn Cu-Mo Deposit from the Edong District in the Middle-Lower Yangtze River Metallogenic Belt of China: Evidence from Petrography, Mineral Assemblages, and Fluid Inclusions

Table 2

Summary of microthermometric data of fluid inclusions from different host minerals and stages in the Fuzishan Cu-Mo deposit.

Stage	Host mineral	FI type	Number of FIs studied	Ice-melting temperature Tm (°C)	Halite dissolution temperature Td (°C)	Final homogenization temperature Th (°C)		Salinity (wt.% NaCl equivalent)		Density (g/cm^3)
				Range	Range	Range	Mean	Range	Mean	Range
Prograde skarn	Garnet	S1	23		127–340	422 to >550	—	28.8–41.5	36.2	0.82–0.99
		S2	16	−20.8 to −17.5		483 to >550	—	20.6–22.9	21.7	0.55–0.62
		LV	8	−19.7 to −14.0		431 to >550	—	17.8–22.1	20.1	0.57–0.70
		VL	11	−9.6 to −5.2		405 to >550	—	8.1–13.5	10.1	0.18–0.25
	Diopside	S1	33		180–351	485 to >550	—	30.9–42.5	38.3	0.85–0.97
		S2	8	−17.9 to −16.4		488 to >550	—	19.8–20.1	20.3	0.52–0.54
		LV	5	−14.5 to −13.5		>550	—	17.3–18.2	17.8	0.47–0.53
		VL	5	−3.5 to −2.2		430 to >550	—	3.7–5.7	5.0	0.15–0.50
Retrograde skarn	Epidote	S2	22	−14.8 to −7.1		240 to 471	379	10.6–18.5	14.3	0.58–0.89
		LV	62	−17.6 to −5.2		212 to 498	350	8.1–20.7	15.5	0.60–0.97
		VL	2	−3.3 and− 1.5		350 to 401	376	2.6–5.4	4	0.57–0.63
Quartz-sulfide	Quartz	LV	48	−12.4 to −3.7		192 to 367	262	6.0–16.3	10.6	0.71–0.94
		VL	4	−4.4 to −1.7		363 to 485	395	2.9–7.0	4.3	0.41–0.62
	Calcite	LV	78	−14.1 to −3.5		157 to 382	270	5.7–17.9	12.8	0.75–0.99
	Late anhydrite	LV	68	−10.5 to −1.3		150 to 458	287	2.2–14.5	8.0	0.40–1.00
Carbonate	Calcite	LV	9	−2.9 to −1.4		125 to 204	173	2.4–4.8	3.8	0.89–0.98
	Quartz	LV	4	−7.9 to −0.1		89 to 223	149	0.2–11.5	4.1	0.89–0.96