Metallogeny of the Dagangou Au-Ag-Cu-Sb Deposit in the Eastern Kunlun Orogen, NW China: Constraints from Ore-Forming Fluid Geochemistry and S-H-O Isotopes

Table 2

Microthermometric results of fluid inclusions in the Dagangou Au-Ag-Cu-Sb deposit.

Mineralization stage

Mineralized zone

FIA group

Fluid inclusion type

Number

Melting temperature of CO2 ( (°C))

Ice melting temperature ( (°C))

Melting temperature of CO2 clathrate ( (°C))

Homogenization temperature of CO2 ( (°C))

Melting temperature of halite ( (°C))

Final homogenization temperature ( (°C))

Salinity ( (wt.% NaClequiv.))

Density of CO2 ( (g·cm^-3))

Density ( (g·cm^-3))

Ank-Qz-Py stage

Cu-Ag mineralized zone (SB I)

Group-1

Type I

2

-56.8 to -58.4

28.3–29.2

0.62–0.65

Type II

3

-56.7 to -58.1

6.8–7.8

28.2–29.2

284.8–308.4

4.3–6.1

0.62–0.66

0.73–0.88

Type III

3

-6.4 to -7.1

298.4–313.4

9.7–10.6

0.80–0.92

Group-2

Type I

2

-56.9 to -58.5

27.8–28.6

0.64–0.67

Type II

2

-57.0 to -58.0

7.4–7.6

27.9–28.6

278.5–280.6

4.7–5.1

0.62–0.67

0.84–0.89

Type III

3

-5.7 to -7.4

260.8–302.1

8.8–12.1

0.80–0.88

Au-Sb mineralized zone (SB II)

Group-3

Type I

2

-57.0 to -58.6

27.4–27.9

0.66–0.67

Type II

2

-56.8 to -57.8

6.8–7.6

27.4–27.9

226.4–256.4

4.7–6.1

0.66–0.67

0.75–0.84

Type III

3

-7.2 to -8.5

240.4–271.5

10.7–12.3

0.87–0.95

Group-4

Type I

4

-56.9 to -58.4

26.8–28.0

0.66–0.69

Type II

7

-56.7 to -58.1

5.9–8.3

27.2–29.2

236.5–2265.4

3.4–7.6

0.62–0.68

0.70–0.89

Type III

11

-6.3 to -9.2

210.4–238.9

9.6–13.1

0.80–0.94

Au mineralized zone (SB III)

Group-5

Type I

2

-56.9 to -57.9

26.2–27.4

0.67–0.69

Type II

5

-56.9 to -57.8

5.5–7.4

26.1–29.2

234.1–279.8

5.2–8.3

0.62–0.70

0.72–0.82

Type III

6

-5.6 to -8.3

224.3–265.3

8.7–12.1

0.86–0.91

Group-6

Type I

2

-57.0 to -58.4

27.3–27.8

0.66–0.67

Type II

4

-56.7 to -57.7

5.8–8.1

27.1–29.1

237.5–268.5

3.8–7.8

0.62–0.69

0.70–0.84

Type III

9

-5.6 to -9.2

208.7–257.5

8.7–13.4

0.87–0.95

Qz-Au-Sul stage

Cu-Ag mineralized zone (SB I)

Group-7

Type I

1

-57.8

28.3

0.65

Type II

3

-56.8 to -57.8

5.5–6.8

28.1–28.7

226.2–241.1

6.3–8.3

0.63–0.66

0.60–0.73

Type III

6

-6.3 to -10.7

216.1–251.7

9.5–14.5

0.90–0.96

Group-8

Type I

1

-58.0

28.1

0.66

Type II

2

-56.8 to -57.6

6.3–7.2

27.7–29.8

227.4–233.6

5.4–7.0

0.58–0.67

0.75–0.83

Type III

4

-8.4 to -9.4

207.2–241.3

12.2–13.3

0.92–0.96

Au-Sb mineralized zone (SB II)

Group-9

Type II

2

-56.8 to -57.5

5.6–6.4

24.8–27.2

228.5–232.6

6.8–8.1

0.67–0.72

0.89–0.90

Type III

4

-7.3 to -11.2

184.3–215.3

11.0–15.2

0.93–1.00

Type IV

3

304.8–315.8

223.5–235.2

38.2–39.1

1.07–1.07

Group-10

Type I

2

-57.2 to -57.9

27.9–28.7

0.63–0.66

Type II

4

-56.9 to -57.3

5.6–6.1

27.6–29.1

216.2–239.7

7.3–8.1

0.62–0.67

0.67–0.90

Type III

9

-7.3 to -10.7

196.1–221.3

10.9–14.7

0.94–0.98

Type IV

2

298.4–321.5

214.8–217.6

37.8–39.5

1.07–1.08

Au mineralized zone (SB III)

Group-11

Type I

1

-57.6

26.2

0.69

Type II

3

-56.9 to -57.2

4.6–7.0

28.2–29.0

216.3–222.7

5.8–9.7

0.62–0.65

0.72–0.82

Type III

6

-8.4 to -11.6

193.7–218.8

12.1–15.6

0.92–0.97

Type IV

2

286.3–301.3

225.8–231.9

37.0–38.0

1.07–1.08

Qz-Cal stage

Cu-Ag mineralized zone (SB I)

Group-12

Type III

5

-4.0 to -5.9

196.9–216.6

6.4–9.1

0.91–0.94

Group-13

Type III

5

-4.4 to -7.8

172.8–224.2

7.0–11.4

0.89–0.98

Au-Sb mineralized zone (SB II)

Group-14

Type III

6

-3.0 to -4.9

176.8–215.2

4.9–7.7

0.89–0.94

Group-15

Type III

7

-3.4 to -6.3

167.3–198.1

5.5–9.7

0.93–0.97