Náttúrufræðingurinn - 1997, Síða 92

Hrefna Kristmannsdóttir 1982. Alteration of the
IRDP hole compared with other drill holes in
Iceland. J. Geophys. Res. 87. 6525-6531.
Hrefna Kristmannsdóttir & Jens Tómasson 1978.
Zeolite zones in geothermal areas in Iceland. I
Natural zeolites, occurrence, properties, use.
Pergamon Press, New York. 277-284.
Ingvar Birgir Friðleifsson 1979. Geothennal ac-
tivity in Iceland. Jökull 29. 47-56.
Kristján Sæmundsson & Ingvar Birgir Friðleifs-
son 1980. Jarðhiti og jarðffæðirannsóknir.
Náttúruffæðingurinn 50. 157-188.
Sigurður R. Gíslason, P.J. Heaney, D.R. Veblen &
K.J.T. Livi 1993. The difference between the
solubility of quartz and chalcedony: the cause?
Chem. Geol. 107. 363-366.
Sigurður R. Gíslason & Stefán Amórsson 1990.
Saturation state of natural waters in Iceland
relative to primary and secondary minerals in
basalts. I Fluid-Mineral Interactions: A Tribute
to H.P. Eugster. The Geochemical Society, Sp.
Publ. no. 2. 373-393.
Stefán Amórsson 1969. A geochemical study of
selected elements in thermal waters of Iceland.
Óbirt doktorsritgerð, Imperial College, London.
353 bls.
Sigurður R. Gislason, Stefán Amórsson & Halldór
Armannsson 1996. Chemical weathering of ba-
salt in southwest Iceland: Effects of mnoff, age
of rocks and vegetational/glacial cover. Amer.
J. Sci. 296. 837-907.
Stefán Amórsson 1995a. Geothermal systems in
Iceland: Structure and conceptual models - I.
High-temperature areas. Geothermics 24. 561-
602.
Stefán Amórsson 1995b. Geothermal systems in
Iceland: Stmcture and conceptual models - II.
Low-temperature areas. Geothennics 24. 603-
629.
Walker G.P.L. 1960. Zeolite zones and dike distri-
bution in relation to the stmcture of basalts of
eastem Iceland. J. Geol. 68. 515-528.
Walker G.P.L. 1963. The Breiddalur central vol-
. cano, eastem Iceland. Q. J. Geol. Soc. London
119. 29-63.
PÓSTFANG HÖFUNDAR
Stefán Arnórsson
Jarðfræðihúsi Háskólans
v/Hringbraut
101 Reykjavík
202