Jökull - 01.01.2004, Qupperneq 124

Sigvaldason, G. E., S. Thorarinsson, Th. Einarsson and
G. Elisson 1964. The submarine eruption off the
Westman islands 1963–1964. Bull. Volcanol. 27, 435–
445.
Sigvaldason, G. E. 1963. Influence of geothermal activity
of three glacier rivers on the chemistry in southern Ice-
land. Jökull 13, 10–17.
Sigvaldason, G. E. and D. E. White 1963. Epidote and
related minerals in two deep geothermal drill holes,
Reykjavík and Hveragerdi, Iceland. U.S. Geol. Survey
Prof. Paper 450E, E77–79.
D. E. White and G. E. Sigvaldason 1963. Epidote in hot-
springs systems, and depth of formation of propylitic
epidote in epithermal ore depostits, U.S. Geol. Survey
Prof. Paper 450-E, E80–84.
Sigvaldason, G. E. and D. E. White 1962. Hydrothermal
alteration in drill holes GS-5 and GS-7, Steamboat
springs, Nevada; U.S. Geol. Survey Prof. Paper 450-
D, 113–119.
Thorarinsson, S. and G. E. Sigvaldason 1962. The eruption
of Askja, 1961. A preliminary report. Am. J. Sci. 260,
641–652.
Sigvaldason, G. E. and D. E. White 1961. Hydrothermal
alteration of roks in two drill holes at Steamboat
Springs, Washoe County, Nevada. U.S. Geol. Survey
Prof. Paper 424-D, 116–122.
Sigvaldason, G. E. 1959. Mineralogische Untersuchungen
über Gesteinszersetzung durch postvulkanische Akti-
vität in Island. Beitr. Mineral. Petrogr. 6, 505–526.
Sigvaldason, G. E. 1958. Das Liparitvorkommen des
Móskardshnjúkar auf Island. Beitr. Mineral. Petrogr.
6, 100–107.
Reports – Skýrslur
Annertz, K., M. Nilsson and G. E. Sigvaldason 1985. The
postglacial history of Dyngjufjöll.Nordic Volcanolog-
ical Institute, University of Iceland 8503, 22 pp.
Sigvaldason, G. E. 1968. Structure and products of sub-
aquatic volcanoes in Iceland. Nordic Volcanological
Institute, University of Iceland 7906, 36 pp.
Sigvaldason, G. E. 1979. Fluids in volcanic and geo-
thermal systems. Nordic Volcanological Institute, Uni-
versity of Iceland 7906, 36 pp.
Óskarsson, N., G. E. Sigvaldason and S. Steinthórsson,
1979. A dynamic model of rift zone petrogenesis and
the regional petrology of Iceland. Nordic Volcanol.
Institute, University of Iceland 7905, 104 pp.
Sigvaldason, G. E. 1979. Rifting, magmatic activity and
interaction between acid and basic liquids: the 1875
Askja eruption in Iceland. Nordic Volcanological
Institute, University of Iceland 7903, 54 pp.
Sigvaldason, G. E. 1979. Volcanic prediction in Iceland.
Nordic Volcanological Institute, University of Iceland
7902, 19 pp.
Sigvaldason, G. E. 1978. Dyngjufjöll and Askja; Notes on
geothermal areas In: Þórarinsson S. Roadlog: Reykja-
vík, Akureyri, Mývatn, Askja.
Sigvaldason, G. E. 1975. Compositional variation in re-
cent Icelandic tholeiites and the Kverkfjöll hot spot.
Science Institute, University of Iceland report RH G-
75-A1, 3 pp.
Sigvaldason, G. E. 1974. Chemical composition of
volcanic gases. University of Iceland 1, 53 pp. also in
Physical volcanology, L. Civetta et al. eds. Elsevier,
Amsterdam, 215–240.
Sigvaldason, G. E. 1972. Kvikasilfur í íslenzku umhverfi.
(Hg in Iceland), Science Institute Report RH-G-72-
B1, 14 pp.
Steinthorsson S. and G. E. Sigvaldason 1971. Skýrsla um
bergfræðirannsóknir við Stardal. (petrological studies
in Stardalur), Science Institute Report fjölrit, 12 pp.
Sigvaldason, G. E., K. Sæmundsson, S. Björnsson, G.
Elísson and H. Kjartansson 1972. Rannsókn á jarðhita
í Reykholtsdal. (Geothermal areas in Reykholtsdalur),
Orkustofnun, report, 36 pp.
Sigvaldason, G. E. 1968. Geochemistry of the Ahuachap-
an thermal area, El Salvador, Central America. In: El
Salvador Survey of Geothermal Resources: Progress
Report, United Nations Development Programme,
Special Fund, 66–100.
Sigvaldason, G. E. and S. Fridriksson 1968. Structure and
products of subaquatic volcanoes in Iceland. Surtsey
Research Progress Report IV, 141–142.
Sigvaldason, G. E. and S. Fridriksson 1968. Water soluble
leachate of volcanic ash from Surtsey. Surtsey Rese-
arch Progress Report IV, 163–164.
Sigvaldason, G. E. and G. Elisson 1968. Collection and
analysis of volcanic gases at Surtsey. Surtsey Research
Progress Report IV, 161.
Sigvaldason, G. E. and G. Elisson 1967. Report on col-
lection and analysis of volcanic gases from Surtsey.
Surtsey Research Progress Report III, 96–97.
Sigvaldason, G. E. and G. Elisson 1966. Report on col-
lection and analysis of volcanic gases from Surtsey.
Surtsey Research Progress Report II, 93–96.
124 JÖKULL No. 54, 2004