Fluid Inclusions and C-H-O-S-Pb Isotope Systematics of the Changfagou Deposit, Jilin Province, Northeast China
Table 1
Microthermometry and relative parameters of FIs in the Changfagou deposit.
Mineralization stage
Type
Number
Size (μm)
V
W-, V-type FIs
S-type FIs
C-Type FIs
Salinity (wt% NaCl eq.)
Density (g/cm3)
Tm-ice (°C)
Th (°C)
Td-bud (°C)
Td-dm (°C)
Tm-co2 (°C)
Tm-cla (°C)
Th-co2 (°C)
Th (°C)
K-feldspar-quartz-magnetite
W
46
2–12
10%–25%
−16.4 to −4.8
250.8–436.8
7.58–19.95
0.64–0.91
V
25
3–12
40%–80%
−17 to −7.7
272.4–413.6
11.36–20.43
0.78–0.92
C
18
3–12
−56.8 to −59.2
3.3–6.7
22.8–27
398.2–449.9
6.29–11.57
0.77–0.85
S
13
2–8
10%–20%
219.3–317.6
293.8–427.5
37.69–50.55
1.08–1.11
Quartz-molybdenite
W
49
3–12
10%–30%
−12.8 to −4.7
256.2–390.8
7.44–15.75
0.73–0.89
V
18
4–12
40%–70%
−10.4 to −7.9
312.4–390.3
11.11–14.42
0.73–0.82
S
14
3–12
10%–25%
132.7–310
177.3–424.2
30.80–50.17
1.10–1.11
Quartz-chalcopyrite (polymetallic sulfide)
W
49
2–12
10%–30%
−11.4 to −2.9
161.3–335.7
5.25–15.45
0.83–0.99
S
15
3–10
15%–25%
165.3–267.9
215.3–315.4
32.67–39.3
1.10–1.11
Carbonate
W
22
2–8
15%–30%
−8.7 to −1.3
123.1–261.9
2.23–12.54
0.82–0.99
Note: Tm-co2: melting temperature of solid CO2; Tm-cla: temperature of CO2-clathrate dissociation; Th-co2: homogenization of CO2; Tm-ice: final melting temperature of ice; Th: total homogenization temperature; Td-bud: bubble disappear temperature; Td-dm: daughter mineral disappear temperature; V: percentage of bubble volume.
