Jökull - 01.01.2013, Qupperneq 32

Þ. Björnsdóttir and P. Einarsson
Einarsson, P., B. Brandsdóttir, M. T. Guðmundsson, H.
Björnsson, K. Grönvold and F. Sigmundsson 1997.
Center of the Iceland hotspot experiences volcanic un-
rest. Eos Transactions 78, 35, 369, 374–375.
Friðleifsson, G. Ó. and H. Jóhannesson 2005. Exception-
ally high-grade surface alteration in the Vonarskard
active central volcano, Mid-Iceland. Proceedings
World Geothermal Congress 2005. Antalya, Turkey,
24–25 April 2005.
Guðmundsson, M. T., F. Sigmundsson and H. Björns-
son 1997. Ice-volcano interaction of the 1996 Gjálp
subglacial eruption, Vatnajökull, Iceland. Nature 389,
954–957.
Hemond, C., N. T. Arndt, U. Lichtenstein, A. W. Hofmann,
N. Óskarsson and S. Steinþórsson 1993. The hetero-
geneous Iceland Plume: Nd-Sr-O isotopes and trace
element constraints. J. Geophys. Res. 98(B9), 15,833–
15,850, doi:10.1029/93JB01093.
Hjartardóttir, Á. R., P. Einarson and H. Sigurðsson 2009.
Structure of the northern fissure swarm of the Askja
volcanic system in the volcanic zone of Northern Ice-
land: Uneven distribution of fractures in space and
time. Bull. Volcanol. 71(9), 961–975.
Hjartardóttir, Á. R. and P. Einarsson 2012. The Kverkfjöll
fissure swarm and the eastern boundary of the North-
ern Volcanic Rift Zone, Iceland. Bull. Volcanol. 74,
143–162, doi:10.1007/s00445-011-0496-6
Hjartardóttir, Á. R., P. Einarsson, E. Bramham and T.
J. Wright 2012. The Krafla fissure swarm, Iceland,
and its formation by rifting events. Bull. Volcanol. 74,
2139–2153. doi:10.1007/s00445-012-0659-0.
Jakobsson, S. 1979a. Petrology of Recent basalts of the
Eastern Volcanic Zone, Iceland. Acta Nat. Isl. 26, 103
pp.
Jakobsson, S. 1979b. Outline of the petrology of Iceland,
Jökull 29, 57–73.
Jakobsson S. P., K. Jónasson and I. A. Sigurðsson 2008.
The three igneous rock series of Iceland. Jökull 58,
117–138.
Jóhannesson, H. and K. Sæmundsson 1998. Geological
map of Iceland: tectonics. Náttúrufræðistofnun Ís-
lands, Reykjavík.
Jóhannesson, H. and G. Ó. Friðleifsson 2006a. Geological
map (bedrock) of Hágöngur, 1:50.000. Landsvirkjun,
Reykjavík.
Jóhannesson, H. and G. Ó. Fridleifsson 2006b. Map
of geothermal surface manifestations and tectonics,
1:50.000. Landsvirkjun, Reykjavík.
Jónasson, K. 2007. Silicic volcanism in Iceland: Composi-
tion and distribution within the active volcanic zones.
J. Geodynamics 43, 101–117.
Kaldal, I. and S. Víkingsson 1990. Early Holocene
deglaciation in Central Iceland. Jökull 40, 51–66.
Karlsdóttir, R., A. M. Vilhjálmsson and H. Eysteinsson
2008. Vonarskard – TEM and MT-measurements in
2007, (in Icelandic). Íslenskar Orkurannsóknir (Ice-
land Geosurvey) report ISOR-2008/064. 49 pp.
Kjartansson, G. 1943. Geology of Árnessýsla (in Ice-
landic). In: Árnesingasaga I, 250 pp.
Kjartansson, G. 1965. Geological map of Iceland, sheet
5, Central Iceland. Published by the Cultural fund,
Reykjavík.
Kurtz, T., R. Gloaguen, C. Ebinger, M. Casey and B.
Abebe 2007. Deformation distribution and type in the
Main Ethiopian Rift (MER): A remote sensing study,
J. African Earth Sci. 48, 100–114.
Pagli, C., F. Sigmundsson, R. Pedersen, P. Einarsson, Þ.
Árnadóttir and K. L. Feigl 2007. Crustal deformation
associated with the 1996 Gjálp subglacial eruption,
Iceland: InSAR studies in affected areas adjacent to
the Vatnajökull ice cap. Earth Planet. Sci. Lett. 259,
24–33.
Pedersen, R., F. Sigmundsson and P. Einarsson 2007.
Controlling factors on earthquake swarms associated
with magmatic intrusions; constraints from Iceland. J.
Volcanol. Geotherm. Res. 162, 73–80. doi:10.1016/-
j.jvolgeores.2006.12.010
Piper, J. D. A. 1979. Outline volcanic history of the re-
gion west of Vatnajökull, Central Iceland. J. Volcanol.
Geotherm. Res. 5, 87–98
Sæmundsson, K. 1978. Fissure swarms and central volca-
noes of the neovolcanic zones in Iceland. In: Crustal
evolution in northwestern Britain and adjacent re-
gions. D. R. Bowes and B. E. Leake (eds.). Geol. J.
Special Issue 10, 415–432.
Sæmundsson, K. 1974. Evolution of axial rifting zone in
northern Iceland and the Tjörnes Fracture Zone. Geol.
Soc. Am. Bull. 85, 495–504.
Sæmundsson, K. 1982. Calderas in the active volcanic
belts of Iceland (in Icelandic). Eldur er í Norðri.
Sögufélagið, Reykjavík, 221–239.
Walker, G. P. L. 1993. Basaltic-volcano systems. In:
Prichard H. et al. (ed.). Magmatic Processes and Plate
Tectonics. Geol. Soc. Special Publ. 76, 3–38.
32 JÖKULL No. 63, 2013