Jökull - 01.12.1984, Side 117
the hypothesis that hydrothermal circulation
must be severely curtailed during periods of
glaciation because of a limited ground water
recharge. He suggests that the rock/water heat
transfer processes supplying the low-temperature
thermal activity in Iceland today are not a steady
state phenomenon, but of a transient nature,
dating back to the end of the last glaciation about
10,000 years ago. His calculations for various
transient heat transfer models lead to a recharge
area which is an order of magnitude smaller than
the above value.
ACKN OWLEDGEMENTS
This work was financed by the Geothermal
Division of the National Energy Authority. We
wish to express our thanks to Kristján
Saemundsson and Ólafur G. Flóvenz for reading
and improving an early version ofthe manuscript.
REFERENCES
Árnason, B. 1976: Groundwater systems in Ice-
land traced by deuterium. Soc. Sci. Islandica,
Rit 42, 236 pp.
Arnórsson, S., E. Gunnlaugsson and H. Svavars-
son 1983: The chemistry of geothermal water
in Iceland. II. Mineral equilibria and indepen-
dent variables controlling water compositions.
Geochim. Cosmochim. Acta 47: 547-566.
Bödvarsson, G. 1982: Glaciation and geothermal
processes in Iceland. Jökull 32: 21-28.
Einarsson, P.t F. W. Klein and S. Björnsson
1977: The Borgarfjördur earthquakes of 1974
in West Iceland. Bull. Seism. Soc. Am. 67:
187-208.
Einarsson, T. 1937: Uber eine Beziehung zwis-
chen heissen Quellen und Gangen in der is-
landischen Basaltformation. Soc. Sci. Island-
ica, Greinar 1.2: 135-145.
Einarsson, T. 1942: Uber das Wesen der heissen
Quellen Islands. Soc. Sci. Islandica, Rit 26, 91
pp.
Flores, R. M. 1981: Geological mapping in geo-
thermal exploration with special reference to
tephrochronology and paleomagnetic techni-
ques. UNU Geothermal Training Prog-
ramme, Report 1981-4, 78 pp.
Flovenz, Ó. G. 1980: Túlkun viðnámsmælinga.
Proceedings of a conference on Geothermal
exploration held by the Geological Society of
Iceland (in Icelandic): 51-53.
Flóvenz, Ó. G. and L. S. Georgsson 1982: Pro-
specting for vertical aquifers in low tempera-
ture geothermal areas in Iceland. Geoth. Res.
Council, Transactions 6: 19-22.
Flóvenz, Ó. G. and L. S. Georgsson 1983:
Resistivity structure of the upper crust in Ice-
land. IUGG 18th General Assembly in Ham-
burg, 1983, abstracts I: 148.
Franzson, H. 1978: Structure and petrochemistry
of the Hafnarfjall-Skardsheidi central volcano
and the surrounding basalt succession, W-Ice-
land. Ph. D. thesis, University ofEdinburgh,
264 pp.
Georgsson, L. S., H. Jóhannesson, G. I.
Haraldsson and E. Gunnlaugsson 1978: Jarð-
hitakönnun í utanverðum Reykholtsdal.
Report in Icelandic, National Energy Author-
ity, OSJHD7856, 89 pp.
Georgsson, L. S., H. Jóhannesson and E. Gunn-
laugsson 1981a: The Baer thermal area in
western Iceland: Exploration and exploita-
tion. Geoth. Res. Council, Transactions 5:
511-514.
Georgsson, L. S., H. Jóhannesson, E. Gunn-
laugsson, M. Kjartansdóttir, H. Sigvaldason,
Th. Thorsteinsson and G. I. Haraldsson
1981b: Bær í Bæjarsveit, jarðhitarannsóknir
og boranir. Report in Icelandic, National
Energy Authority, OS81014/JHD09, 156 pp.
Gunnlaugsson, E. 1980: Borgarfjörður, efna-
fræði jarðhitavatns. Report in Icelandic,
National Energy Authority, OS80020/JHD11,
61 pp.
Gudmundsson, J. S. and G. Pálmason 1981:
World survey of low-temperature geothermal
energy utilization. Report in English, Natio-
nal Energy Authority, OS81005/JHD02, 148
pp.
Jóhannesson, H. 1975: Structure and petrochem-
istry of the Reykjadalur central volcano and
the surrounding areas, midwest Iceland.
Ph.D. thesis, University of Durham, 273 pp.
Jóhannesson, H. 1980: Jarðlagaskipan og þróun
gosbelta á Vesturlandi (in Icelandic with Engl-
ish summary). Náttúrufræðingurinn 50: 13-31.
Jóhannesson, H., L. S. Georgsson and E.
Gunnlaugsson 1980: Jarðhiti í Borgarfirði.
Proceedings of a conference on Geotherma!
exploration held by the Geological Society of
Iceland (in Icelandic): 14-16.
Jóhannesson, H., G. I. Haraldsson, L. S.
Georgsson and E. Gunnlaugsson 1979: Jarð-
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