Sæmundur A. Halldórsson

University of Iceland — IS

Earth and Planetary Sciences · Physical Sciences

32h-index3.5kcitations177works2.62yr avg
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Research Topics

Geological and Geochemical Analysis(107), Geology and Paleoclimatology Research(59), earthquake and tectonic studies(54), Methane Hydrates and Related Phenomena(35), High-pressure geophysics and materials(34)

Publications177 total

Carbon Isotope and Abundance Systematics Reveal an Insignificant Crustal Sink of Mantle‐Derived CO <sub>2</sub> in On‐Land Rift Zone Geothermal Systems
Geochemistry Geophysics Geosystems·2025Open Access
Mush Disaggregation and Dike Propagation Timescales at Active Volcanoes: Evidence from the 2022–2023 Fagradalsfjall Eruptions
Journal of Petrology·2025· 5 cited
Heterogeneous trace element deposition from an effusive volcanic plume
2025Open Access
A dynamic mid-crustal magma domain revealed by the 2023-24 Sundhn&amp;#250;ksg&amp;#237;gar eruptions, Iceland
2025Open Access
Helium isotopes in geothermal fluids reveal off-rift plume degassing and localized seismicity-induced processes in North Iceland
Geochimica et Cosmochimica Acta·2025· 1 cited
Magma storage and transport beneath the near-rift Fjallgarðar Volcanic Ridge, Northeast Iceland
Contributions to Mineralogy and Petrology·2025· 2 cited
The Crust Cracks Up: lateral magma transport in NE Iceland
2025
Evidence for core-derived µ <sup>182</sup> W anomalies in the Iceland mantle plume from combined <sup>182</sup> W- <sup>142</sup> Nd and long-lived Sr-Nd-Pb isotope data
2025
Tracing deep mantle component(s) in the near-rift Fjallgarðar Volcanic Ridge, Iceland: New constraints on lateral plume dispersion
2025
Syn-eruptive magma plumbing dynamics of monogenetic lava shields in Iceland
2025
Helium, carbon, nitrogen and sulfur isotopes in thermal fluids from the Albertine Rift, SW Uganda
2025
The olivine-hosted melt-inclusion geochemistry of the 2021 and 2022 eruptions of Fagradalsfjall
2025
The Petrology and Geochemistry of the 2021 Fagradalsfjall Eruption, Iceland: An Eruption Sourced From Multiple, Compositionally Diverse, Near‐Moho Sills
AGU Advances·2024· 10 citedOpen Access
A dynamic mid-crustal magma domain revealed by the 2023 to 2024 Sundhnúksgígar eruptions in Iceland
Science·2024· 17 citedOpen Access
Hydraulically linked reservoirs simultaneously fed the 1975–1984 Krafla Fires eruptions: Insights from petrochemistry
Earth and Planetary Science Letters·2024· 9 citedOpen Access
The effect of diffusion on lithium isotope ratios in Icelandic basalts
Chemical Geology·2024· 4 cited
Magmatic Controls on Volcanic Sulfur Emissions at the Iceland Hotspot
Geochemistry Geophysics Geosystems·2024· 1 citedOpen Access
Greenland 2022 GHOST project: Sampling Greenland geothermal springs - expedition report
Open Research Europe·2024· 1 citedOpen Access
Isotopic and kinetic constraints on methane origins in Icelandic hydrothermal fluids
Geochimica et Cosmochimica Acta·2024· 8 citedOpen Access
Medieval eruptions in the Reykjanes Peninsula, Iceland: magma storage depths and SO2 emission potentials for future eruption hazard assessment&amp;#160;
2024· 1 citedOpen Access
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Frequent Co-authors

D. R. Hilton(14), Enikö Bali(13), Guðmundur H. Guðfinnsson(13), Andri Stefánsson(13), Peter H. Barry(12), Matthew G. Jackson(10), Jaime D. Barnes(7), Alberto Caracciolo(7), Margaret Hartley(7), Tobias P. Fischer(6), Eemu Ranta(6), Martin J. Whitehouse(6), Maren Kahl(5), Edward W. Marshall(5), Mark D. Kurz(5), Olgeir Sigmarsson(4), Sigurður Jakobsson(4), Gro B. M. Pedersen(4), David V. Bekaert(4), Michael W. Broadley(4)