Table 1. Chemical composition of epithermal silver ore fluids.
Assemblage | N* | Sal.† | Th§ | Li | Mg | Cl | K | Ca | Mn | Cu | Zn | Sr | Ag | Sb | Ba | Pb | Bi |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | 8 | 16.5 | 271 | 600 | 43 | 96280 | 28590 | 50250 | 810 | 2.2 | 38 | 400 | 27 | 14 | 33 | 20 | 0.5 |
2 | 4 | 15.4 | 294 | 740 | <38 | 93350 | 18760 | 41930 | 700 | <0.5 | 39 | 340 | 15 | 16 | 32 | 17 | <0.1 |
3 | 3 | 8.8 | 275 | 540 | <37 | 53110 | 9040 | 24480 | 410 | 1.7 | 14 | 160 | 23 | 8.3 | 0.6 | 2.0 | <0.1 |
4 | 1 | 10.6 | N.D.# | 810 | <13 | 64150 | 14010 | 30390 | 350 | <0.2 | 2.6 | 240 | 1.0 | 2.5 | 0.2 | 0.2 | <0.1 |
5 | 2 | 8.9 | 296 | 460 | <17 | 54180 | 19370 | 17060 | 250 | 5.6 | 5.9 | 180 | 6.6 | 32 | 23 | 1.7 | <0.1 |
6 | 1 | 9.2 | 287 | 240 | 34 | 55760 | 18600 | 9210 | 3580 | <3.6 | 4.8 | 180 | 1.7 | 70 | 21 | 1.0 | 1.4 |
7 | 4 | 9.0 | 294 | 310 | 6.2 | 54170 | 15610 | 18600 | 370 | <0.2 | 2.7 | 190 | 1.5 | 9.4 | 22 | 0.5 | 0.1 |
8 | 2 | 9.5 | 286 | 600 | <59 | 57690 | 2270 | 12960 | 79 | <1.6 | 2.8 | 110 | 3.2 | 54 | 5.2 | 3.0 | <0.1 |
9 | 3 | 15.3 | 276 | 650 | <24 | 92560 | 6000 | 36980 | 310 | 7.9 | 19 | 390 | 3.0 | 48 | 12 | 7.2 | <0.3 |
10 | 3 | 3.7 | N.D.# | 130 | <2.5 | 22640 | 1620 | 1280 | <0.7 | 8.2 | <0.1 | 17 | 0.5 | 45 | 1.2 | <0.03 | <0.1 |
11 | 3 | 9.0 | 288 | 330 | 72 | 54700 | 5890 | 13540 | 160 | 1.2 | 1.7 | 64 | 1.8 | 8.1 | 0.7 | 2.4 | <0.1 |
12 | 2 | 9.5 | 289 | 280 | <150 | 57320 | 3900 | 10630 | 310 | <4.6 | <6.1 | 50 | <1.2 | 11 | <1.6 | 3.1 | <0.5 |
13 | 5 | 8.1 | 285 | 400 | 56 | 49230 | 4270 | 12360 | 150 | <1.3 | <2.1 | 80 | 10 | 11 | 0.4 | 1.6 | <0.1 |
14 | 1 | 16.2 | N.D.# | 290 | <210 | 98000 | 3490 | 18760 | 290 | <5.1 | <11 | 100 | <1.1 | 3.9 | 5.4 | 2.5 | <0.2 |
15 | 3 | 16.7 | 297 | 750 | <220 | 101360 | 7450 | 28260 | 450 | <9.7 | <13 | 260 | 9.1 | 27 | 13 | 18 | <0.5 |
16 | 1 | 13.9 | N.D.# | 470 | <58 | 84130 | 6150 | 42540 | 460 | <2.1 | 4.7 | 220 | 3.6 | 26 | 8.7 | 9.7 | <0.3 |
17 | 2 | 9.2 | 280 | 200 | <110 | 55750 | 2860 | 13520 | 320 | <2.5 | <4.8 | 37 | <0.5 | 25 | <0.8 | 1.6 | <0.2 |
18 | 2 | 14.1 | 290 | 260 | <130 | 85660 | 6020 | 15040 | 280 | <3.6 | 30 | 66 | <0.7 | 9.7 | 15 | 20 | <0.5 |
Note: Fluid composition data (ppm) obtained by laser ablation ICP-MS analysis of individual fluid inclusions. Data presented represent mean values for a fluid inclusion assemblage in which several inclusions are inferred to have been co-trapped.
*N = Number of inclusions measured from each assemblage.
†Sal. = Salinity (wt% NaCl equivalent).
§Th = Homogenization temperature (°C).
#N.D. = Not determined.
< No results above the limit of detection; the value given is the minimum limit of detection recorded for an inclusion analysis in that assemblage, as the best estimate of the maximum concentration for that element.