Morten S. Riishuus


Television segment on the discovery of a buried central volcano on the Faroe Islands

Morten S. Riishuus, 04/12/2015 09:43

Paper appeared in Geochemical Perspectives Letters

Morten S. Riishuus, 04/12/2015 09:32

Gíslason SR, Stefánsdóttir G, Pfeffer MA, Barsotti S, Jóhannsson T, Galeczka I, Bali E, Sigmarsson O, Stefánsson A, Keller NS, Sigurdsson Á, Bergsson B, Galle B, Jacobo VC, Arellano S, Aiuppa A, Jónasdóttir EB, Eiríksdóttir ES, Jakobsson S, Guðfinnsson GH, Halldórsson SA, Gunnarsson H, Haddadi B, Jónsdóttir I, Thordarson T, Riishuus M.S., Högnadóttir T, Dürig T, Pedersen GBM, Höskuldsson Á, Gudmundsson MT. Environmental pressure from the 2014–15 eruption of Bárðarbunga volcano, Iceland. Geochemical Perspectives Letters 1(0):84-93 (2015).

http://www.geochemicalperspectivesletters.org/img/GPLv1n1_cover.jpg

Segment on field work at the Holuhraun eruption site aired on Discovery Channel Canada

Morten S. Riishuus, 15/04/2015 10:04

The segment can be watched here on the Facebook page of the Institute of Earth Sciences, University of Iceland.

It is the result of an attempt to conduct public outreach and illustrate some of the efforts and work conditions while monitoring an eruption in the heart of the Icelandic highlands. The segment aired on Discovery Channel Canada Monday evening in a show titled Daily Planet. The footage from the eruption site was shot by M.Sc. candidate in volcanology Elísabet Pálmadóttir from the Institute of Earth Sciences on two expeditions from the institute and NORDVULK in January and February 2015. Participants on the eruption team on the two trips were in addition to Ella, Birgir V. Óskarsson, Jóhann Ingi Jónsson, Sveinbjörn Steinthorsson and myself. Many people from the Volcanology and Natural Hazards group at IES have participated in monitoring expeditions to the eruption site throughout the 6-month long eruption.

Let me just correct one narrative in the segment by saying that although we systematically sampled the eruption products to monitor any changes the chemical composition of the melt (including the concentration of the major element oxide SiO2), basalt lava does not contain quartz (with chemical formula of SiO2).

Paper accepted by Contributions to Mineralogy and Petrology

Morten S. Riishuus, 15/04/2015 01:22

Riishuus, M.S., Harris, C., Peate, D.W., Tegner, C., Wilson, J.R. and Brooks, C.K. Formation of low-δ18O magmas of the Kangerlussuaq Intrusion by addition of water derived from dehydration of foundered basaltic roof rocks. Contrib Mineral Petrol 169, 1-16 (2015).

Paper appeared in Journal of Volcanology and Geothermal Research

Morten S. Riishuus, 09/12/2014 01:19

A study based on work by my student Birgir V. Oskarsson on the architecture of Neogene simple aphyric basalt groups from Eastern Iceland has been accepted by the Journal of Volcanology and Geothermal Research. This work is funded by a fellowship to BVO from NordVulk and a grant from the Icelandic Centre of Research (Rannis) to MSR.

Óskarsson, B.V. and Riishuus, M.S. The mode of emplacement of Neogene flood basalts in Eastern Iceland: facies architecture and structure of simple aphyric basalt groups. Journal of Volcanology and Geothermal Research 289, 170-192 (2014). First published online November 27 2014, doi:10.1016/j.jvolgeores.2014.11.009.

Sylvia Berg receives an Outstanding Student Poster (OSP) award

Morten S. Riishuus, 19/10/2014 22:55

My Ph.D. student Sylvia Berg achieved an Outstanding Student Poster award at the 2014 EGU General Assembly for her presentation titled:

Making Earth’s earliest continental crust – an analogue from voluminous Neogene silicic volcanism in NE-Iceland (Berg, S. E.; Troll; V. R.; Burchardt, S.; Riishuus, M. S.; Deegan, F. M.; Harris, C.; Whitehouse, M. J.; Gústafsson, L. E.).

Click here to download the poster as PDF-file.

Sylvia Berg is a PhD student at the Centre for Experimental Mineralogy, Petrology & Geochemistry (CEMPEG) at the Department of Earth Sciences, Uppsala University, Sweden, and is co-affiliated to the Nordic Volcanological Center (NordVulk, Iceland). She is supervised by Prof. Valentin R. Troll (Uppsala University), Dr. Steffi Burchardt (Uppsala University) and Dr. Morten S. Riishuus (NordVulk). Her research focuses on the voluminous occurrence of silicic eruptive rocks in NE-Iceland, which is a prominent example of bimodal volcanism and may offer an answer to the long-standing controversy of crustal growth on early Earth. The EGU 2014 poster presented SIMS zircon U-Pb geochronology and δ18O zircon values from this remote region of NE-Iceland, which record that a complete and voluminous pulse of silicic magmatism was generated within ≤2 Myr. Rhyolite formation occurred through massive, but short-lived melting of hydrated basalts by intruding basaltic magmas during a rift relocation and a flare of the Iceland plume. By analogy, these new data suggest that melting of partly hydrated basalt suites was a key process during initial continent formation and would have occurred in pulses of ≤ 2 Myr.

Feature article appeared in Geology Today

Morten S. Riishuus, 20/03/2014 01:43

A feature article written by my Ph.D. student Sylvia E. Berg was published in the March/April issue of Geology Today. The article documents on our geological journey while conducting field work in the remote valleys of NE-Iceland and the incentives behind the research; rhyolite petrogenesis as an analogue for formation of early Earth's silicic continental crust.

Berg, S., Troll, V.R., Burchardt, S., Riishuus, M.S., Krumbholz, M. and Gústafsson, L.E. Iceland's best kept secret. Geology Today 30, 54-60 (2014).

Paper appeared in a Special Publication from the Geological Society of London

Morten S. Riishuus, 30/01/2014 20:45

A study based on work by my former student Per I. Eriksson on the anisotropy of the magnetic susceptibility in a Neogene dyke swarm from Eastern Iceland has now appeared in a Special Publication titled 'The Use of Paleomagnetism and Rock Magnetism to Understand Volcanic Processes' published by the Geological Society of London. This work was funded by a NordVulk fellowship to PIE.

Eriksson P.I., Riishuus M.S., Elming S.-Å. Magma flow and palaeo-stress deduced from magnetic fabric analysis of the Álftafjörður dyke swarm: implications for shallow crustal magma transport in Icelandic volcanic systems. Geological Society, London, Special Publications 396, 107-132 (2015).

Paper appeared in Journal of Volcanology and Geothermal Research

Morten S. Riishuus, 08/10/2013 16:16

A study based on work by my student Birgir V. Oskarsson on the architecture of Neogene olivine basalt groups from Eastern Iceland is published in the Journal of Volcanology and Geothermal Research. This work is funded by a fellowship to BVO from NordVulk and a grant from the Icelandic Centre of Research (Rannis) to MSR.

Óskarsson, B.V. and Riishuus, M.S. The mode of emplacement of Neogene flood basalts in Eastern Iceland: facies architecture and structure of the Hólmar and Grjótá olivine basalt groups. Journal of Volcanology and Geothermal Research 267, 92-118 (2013).

Icelandic Research Fund - Funding announcement for the grant year 2013

Morten S. Riishuus, 17/01/2013 12:01

The Icelandic Research Fund announced yesterday that one of my active research projects involving Ph.D. student Birgir V. Óskarsson was awarded a Project Grant for 2013. The project is titled:

The facies architecture of Neogene flood basalt groups in east Iceland: constraints on lava morphology, emplacement mode, eruption rate and environment.