Jökull - 01.12.1961, Page 37

TABLE IV
Chemical composition of water from steam wells in the Reykjavik, Hengill
and Krysuvik areas.
Analyses: U.S. Geological Survey, Menlo Park, California.
Reykjavik. Hengill. Krysuvik.
Spring, Well Well
88° C at Hveragerdi at Seltun
Date of collect. 2/10’58 31/8’58 10/9’58
SiO^ ...........................
A1 .............................
Fe..............................
Mn..............................
Cu..............................
Pb..............................
Zn..............................
As..............................
Ca..............................
Mg..............................
Na..............................
K...............................
Li..............................
NH4 ............................
HCOs ...........................
CO3 ............................
SO4 ............................
C1 .............................
F...............................
Br..............................
1...............................
N02 ............................
NOs ............................
po4 ............................
B...............................
Sulfidcs as H2S ................
Dissolved solids residue at 180° C . .
Harness as CaC03 ...............
PH .............................
Specific conductance micromhos/cm
at 25° C .......................
Tliis procedure is based on the fact that the
subsurface chemical and physical conditions
appear to change considerably as the base
temperature increases beyond 150° G/,' As a
matter of course, this is no sharp limit.
Data on the measured base temperature in
a number of thermal areas are given in
TABLES 11 and III. The maximum encoun-
tered is about 230° C.
126 ppm 283 ppm 425
0.13 0.37 0.10
0.00 0.12 0.02
0.00 0.00 0.00
0.00 0.00 0.00
0.00 0.00 0.00
0.00 0.00 0.00
0.00 0.08 0.00
1.90 2.80 8.70
0.30 0.00 0.50
159 174 500
1.40 10 68
0.00 0.10 0.60
0.00 0.10 0.00
24 0.00
43 57 50
17 72 67
30 152 735
1.00 2.10 0.70
0.90 0.50 4.80
0.10 0.00 0.10
0.00 0.00 0.03
0.00 0.00 0.40
0.10 0.08 0.15
0.06 0.83 1.70
0.2 3.20 7.00
285 913 2,030
5 6.2 24
9,40 9,40 9,30
281 941 2,760
(e) The total transport of heat and water.
Natural heat escapes from thermal areas in
the following ways, (1) as the sensible heat
content of hot water and steam issued at the
surface, (2) by conduction and radiation from
hot ground, (3) by conduction from the channels
of flow, and (4) by underground drainage of
water.
The first two factors appear to predominate.
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