Geology, Fluid Inclusion, and H–O–S–Pb Isotope Constraints on the Mineralization of the Xiejiagou Gold Deposit in the Jiaodong Peninsula
Table 2
Microthermometric data for fluid inclusions of different stages from the Xiejiagou gold deposit.
Stage
Type
Number
Salinity
CO2 density
Bulk density
°C
°C
°C
°C
°C
wt% NaCl equiv.
g/cm3
g/cm3
Early
Ia
67
-59.4 to -56.6
5.1 – 8.9
21.3 – 30.6
262 – 386
2.22 – 8.82
0.562 – 0.760
0.773 – 0.912
II
6
-57.9 to -56.7
16.7 – 28.4
0.651 – 0.813
Sec Ia
4
-58.1 to -56.7
5.8 – 7.3
21.6 – 30.5
245 – 301
5.14 – 7.70
0.569 – 0.756
0.857 – 0.920
Sec Ib
1
-56.9
8.7
25.3
272
2.58
0.707
0.798
Sec II
2
-57.4 to -57.1
20.4 – 25.6
0.702 – 0.770
Sec IIIa
6
-1.3 to -3.6
165 – 233
2.23 – 5.85
0.845 – 0.939
Middle
Ia
53
-59.1 to -56.6
4.6 – 8.8
20.4 – 30.7
235 – 347
2.39 – 9.59
0.581 – 0.773
0.839 – 0.908
Ib
7
-57.8 to -56.6
6.0 – 9.5
25.0 – 30.2
251 – 302
1.02 – 7.48
0.586 – 0.734
0.779 – 0.846
II
9
-57.6 to -56.8
13.1 – 25.6
0.690 – 0.830
IIIa
61
-1.9 to -7.9
192 – 313
3.21 – 11.60
0.740 – 0.896
IIIb
6
-1.5 to -1.6
242 – 266
2.56 – 2.73
0.800 – 0.828
Sec IIIa
10
-1.0 to -3.3
144 – 187
1.73 – 5.40
0.915 – 0.941
Late
IIIa
69
-0.7 to -4.9
137 – 231
1.22 – 7.72
0.850 – 0.950
Sec: secondary FIs; : melting temperature of solid CO2; : temperature of CO2 clathrate dissociation; : homogenization temperature of CO2; : temperature of final ice melting; : homogenization temperature; wt% NaCl equiv.: weight percent NaCl equivalent.
