Basalt production controlled by mantle source fertility at Fagradalsfjall, Iceland

Autor: Olgeir Sigmarsson, Edward W. Marshall, Chantal Bosq, Delphine Auclair, Maja B. Rasmussen, Barbara I. Kleine, Eemu J. Ranta, Simon Matthews, Sæmundur A. Halldórsson, Matthew G. Jackson, Gudmundur H. Gudfinnsson, Enikö Bali, Andri Stefánsson, Magnús T. Gudmundsson

Mantle melting processes and the characteristics of the source lithologies are mostly derived from basalt compositions of the mid-ocean ridge system and from oceanic islands. However, these basalts are in most cases the products of crustal processes

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b381042055cf66d6285bfddd03e4c5df
https://doi.org/10.5194/egusphere-egu22-8479

A Reappraisal of Peridotite Solidus Phase Equilibria from 6 to 14 GPa in the System CaO–MgO–Al2O3–SiO2

Autor: Gudmundur H. Gudfinnsson, Shantanu Keshav

Publikováno v: Journal of Petrology. 62

Experimentally determined isobaric invariant melting phase relations from 6 to 14 GPa in the system CaO–MgO–Al2O3–SiO2 (CMAS), involving the crystalline phases forsterite + orthopyroxene + clinopyroxene + garnet and liquid, are reported. Experi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6e09e367673b61bb6f63a61e8b6321a4
https://doi.org/10.1093/petrology/egab009

Melt inclusion constraints on volatile systematics and degassing history of the 2014–2015 Holuhraun eruption, Iceland

Autor: Sæmundur A. Halldórsson, Enikő Bali, Gudmundur H. Gudfinnsson, Margaret E. Hartley, Sigurdur Jakobsson

Publikováno v: Bali, E, Hartley, M E, Halldórsson, S A, Gudfinnsson, G H & Jakobsson, S 2018, ' Melt inclusion constraints on volatile systematics and degassing history of the 2014–2015 Holuhraun eruption, Iceland ', Contributions to Mineralogy and Petrology, vol. 173, no. 9 . https://doi.org/10.1007/s00410-017-1434-1

The mass of volatiles emitted during volcanic eruptions is often estimated by comparing the volatile contents of undegassed melt inclusions, trapped in crystals at an early stage of magmatic evolution, with that of the degassed matrix glass. Here we

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b66f0a4844b93c1466dec6ceb9fdfc8
https://pure.manchester.ac.uk/ws/files/63968244/Bali_et_al._Volatile_systematics_paper_Holuhraun_version_before_proof_reading.pdf

Trace element systematics of olivine from historical eruptions of Lanzarote, Canary Islands: Constraints on mantle source and melting mode

Autor: Gudmundur H. Gudfinnsson, Olgeir Sigmarsson, Alejandra Gómez-Ulla

Publikováno v: Chemical Geology
Chemical Geology, Elsevier, 2017, 449, pp.99-111. ⟨10.1016/j.chemgeo.2016.11.021⟩
Chemical Geology, 2017, 449, pp.99-111. ⟨10.1016/j.chemgeo.2016.11.021⟩

Co-auteur étranger; International audience; Oceanic island basalts are thought to originate from partial melting of lithologically heterogeneous mantle. Sobolev and coworkers proposed the use of fractionation-corrected Ni concentration Ni × (FeO/Mg

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f25e654f45ed9900feab21f2423038d8
https://hal.uca.fr/hal-01639562

Melting phase relations of model carbonated peridotite from 2 to 3 GPa in the system CaO‐MgO‐Al 2 O 3 ‐SiO 2 ‐CO 2 and further indication of possible unmixing between carbonatite and silicate liquids

Autor: Gudmundur H. Gudfinnsson, Shantanu Keshav, Davide Novella, Shaunak Ghosh

Publikováno v: Journal of Geophysical Research: Solid Earth. 119:2780-2800

Melting phase relations of model carbonated peridotite in the system CaO-MgO-Al2O3-SiO2-CO2 from 2 to 3 GPa are reported. Experimentally produced melts, which are model carbonatites, with approximately 36-40 wt % CaO, 12-17 wt % MgO, 0.2-1.5 wt % Al2

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5eb9d996b8deed922a2fb9d9d6fced39
https://doi.org/10.1002/2013jb010913