Jökull - 01.12.1977, Síða 54

TABLE 3 - TAFLA 3.
The distribution (in ppm) of chemical species in the unflashed reservoir water feeding the wells
at Námafjall. The same samples were selected as in Table 1. The computation methods applied
to obtain the chemical speciation are those of Arnórsson et al. (1978). They refer to the quartz
equilibrium temperature (tqtz) reported below.
Styrkur (i ppm) ejnasambanda i ósoðnu vatni, sem streymir inn í borholur i Námafjalli. Sömu
sýni voru valin og i Töflu 1. Reikningsaðferðirnar voru fengnar frá Stefáni Arnórssyni o. fl.
(1978). Þessir reikningar miða við kísilhitann, sem gefinn er upp neðst i töflunni.
Chemical species Well 110. / Year and month of sam pling
4 73.07 5 74.03 6 74.03 7 73.07 8 73.11 9 74.03
PH 7.47 7.34 7.35 7.02 7.30 7.25
Na+ 123.6 123.8 126.4 115.6 119.8 113.4
K+ 21.7 18.9 22.2 21.4 20.9 21.2
Ca++ 0.42 1.21 0.32 0.27 0.62 0.37
Mg++ 0.001 0.002 0.001 0.002 0.001 0.0006
H4SiO40 844.5 551.3 783.2 808.0 727.4 829.6
H3SÍO4- 23.9 17.5 18.8 8.6 16.6 14.5
H0CO30 97.7 64.8 139.2 290.2 110.6 187.4
HCO3- 56.6 93.2 82.0 70.8 72.5 70.2
CO3- 0.006 0.04 0.01 0.004 0.01 0.005
HoS° 73.2 35.3 94.1 215.8 73.8 109.3
HS- 91.8 72.8 107.8 106.7 86.4 86.2
s— 0.001 0.0004 0.0009 0.0004 0.0006 0.0006
HSO4- 0.29 0.07 0.18 0.55 0.16 0.30
SO4— 56.6 40.1 35.1 43.8 34.4 36.5
HF° 0.02 0.006 0.01 0.06 0.01 0.02
F- 1.45 0.80 0.84 1.47 1.01 0.85
Cl- 15.4 23.3 24.4 19.2 21.4 17.9
NaCl0 0.20 0.15 0.28 0.21 0.20 0.21
KC1° 0.01 0.01 0.02 0.01 0.01 0.01
NaS04- 46.4 19.1 26.3 31.7 22.6 27.6
KSO4- 5.4 1.9 3.1 3.9 2.6 3.4
CaSO40 3.0 3.2 1.2 1.4 2.2 1.7
MgSO40 0.48 0.20 0.20 0.58 0.16 0.15
CaCO.30 0.02 0.19 0.02 0.008 0.04 0.01
MgCO30 0.0001 0.0005 0.0001 0.00009 0.0001 0.00004
Ionic strength 0.00639 0.00613 0.00654 0.00626 0.00593 0.00574
lqtz 255 218 248 251 241 254
52 JÖKULL 27. ÁR