Rit (Vísindafélag Íslendinga) - 01.06.1976, Blaðsíða 125

15. DEUTERIUM CONTENT OF GEOTHERMAL
WATERS IN ICELAND
15. 1 General remarks and location of the geothermal areas.
In all, 471 samples of geothermal water from 229 geothermal
sources located in various parts of the country have been collected
and measured for their deuterium and sometimes also for their
oxygen-18 content. The results of all these measurements are given
in Table IV in the Appendix. Table IV also gives the names of the
sampling points, their characteristics (where the capital letters H
and S denote drill hole or surface spring respectively), the latitude
and longitude of the sampling points, the date of sampling and the
water temperature when measured. The base temperatures given
are either measured directly in drill holes or they are estimated
from the silicate content of the water (Arnórsson 1973).
Wlien the sampling point is a drill hole the depth of the hole is
given when known, together with the depth of sampling. In all
cases where the samples are collected at various depths in a drill
hole, the collection has been performed by the staff of the National
Electricity Authority by using a specially constructed samphng
apparatus.
In the case of high-temperature areas, i.e. when the tempera-
ture of the deep circulating water is higher than 200°C, the water
samples collected at the surface may have been enriched in deu-
terium with respect to the deep circulating water and therefore the
measured 8D-values need to be corrected. When such corrections
are made the corrected 8D-value is given in the last column in
Table IV.
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