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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 04870naa a2200841 4500 | |
| 001 | oai:gup.ub.gu.se/212200 | |
| 003 | SwePub | |
| 008 | 240528s2015 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://gup.ub.gu.se/publication/2122002 URI |
| 024 | 7 | a https://doi.org/10.1038/nature141112 DOI |
| 040 | a (SwePub)gu | |
| 041 | a eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Sigmundsson, F.4 aut |
| 245 | 1 0 | a Segmented lateral dyke growth in a rifting event at Bardarbunga volcanic system, Iceland |
| 264 | c 2014-12-15 | |
| 264 | 1 | b Springer Science and Business Media LLC,c 2015 |
| 520 | a Crust at many divergent plate boundaries forms primarily by the injection of vertical sheet-like dykes, some tens of kilometres long(1). Previous models of rifting events indicate either lateral dyke growth away from a feeding source, with propagation rates decreasing as the dyke lengthens(2-4), or magma flowing vertically into dykes from an underlying source(5,6), with the role of topography on the evolution of lateral dykes not clear. Here we show how a recent segmented dyke intrusion in the Bardarbunga volcanic system grew laterally for more than 45 kilometres at a variable rate, with topography influencing the direction of propagation. Barriers at the ends of each segment were overcome by the build-up of pressure in the dyke end; then a new segment formed and dyke lengthening temporarily peaked. The dyke evolution, which occurred primarily over 14 days, was revealed by propagating seismicity, ground deformation mapped by Global Positioning System(GPS), interferometric analysis of satellite radar images (InSAR), and graben formation. The strike of the dyke segments varies from an initially radial direction away from the Bardarbunga caldera, towards alignment with that expected from regional stress at the distal end. A model minimizing the combined strain and gravitational potential energy explains the propagation path. Dyke opening and seismicity focused at the most distal segment at any given time, and were simultaneous with magma source deflation and slow collapse at the Bardarbunga caldera, accompanied by a series of magnitude M > 5 earthquakes. Dyke growth was slowed down by an effusive fissure eruption near the end of the dyke. Lateral dyke growth with segment barrier breaking by pressure build-up in the dyke distal end explains how focused upwelling of magma under central volcanoes is effectively redistributed over long distances to create new upper crust at divergent plate boundaries. | |
| 650 | 7 | a NATURVETENSKAPx Geovetenskap och miljövetenskapx Geologi0 (SwePub)105042 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Geology0 (SwePub)105042 hsv//eng |
| 653 | a CRUSTAL STRUCTURE | |
| 653 | a DIKE PROPAGATION | |
| 653 | a HALF-SPACE | |
| 653 | a ICE-CAP | |
| 653 | a DEFORMATION | |
| 653 | a EARTHQUAKE | |
| 653 | a MAGMA | |
| 653 | a CONSTRAINTS | |
| 653 | a ERUPTION | |
| 653 | a SEISMICITY | |
| 700 | 1 | a Hooper, A.4 aut |
| 700 | 1 | a Hreinsdottir, S.4 aut |
| 700 | 1 | a Vogfjord, K. S.4 aut |
| 700 | 1 | a Ofeigsson, B. G.4 aut |
| 700 | 1 | a Heimisson, E. R.4 aut |
| 700 | 1 | a Dumont, S.4 aut |
| 700 | 1 | a Parks, M.4 aut |
| 700 | 1 | a Spaans, K.4 aut |
| 700 | 1 | a Gudmundsson, G. B.4 aut |
| 700 | 1 | a Drouin, V.4 aut |
| 700 | 1 | a Arnadottir, T.4 aut |
| 700 | 1 | a Jonsdottir, K.4 aut |
| 700 | 1 | a Gudmundsson, M. T.4 aut |
| 700 | 1 | a Hognadottir, T.4 aut |
| 700 | 1 | a Fridriksdottir, H. M.4 aut |
| 700 | 1 | a Hensch, M.4 aut |
| 700 | 1 | a Einarsson, P.4 aut |
| 700 | 1 | a Magnusson, E.4 aut |
| 700 | 1 | a Samsonov, S.4 aut |
| 700 | 1 | a Brandsdottir, B.4 aut |
| 700 | 1 | a White, R. S.4 aut |
| 700 | 1 | a Agustsdottir, T.4 aut |
| 700 | 1 | a Greenfield, T.4 aut |
| 700 | 1 | a Green, R. G.4 aut |
| 700 | 1 | a Hjartardottir, A. R.4 aut |
| 700 | 1 | a Pedersen, R.4 aut |
| 700 | 1 | a Bennett, R. A.4 aut |
| 700 | 1 | a Geirsson, H.4 aut |
| 700 | 1 | a La Femina, P. C.4 aut |
| 700 | 1 | a Bjornsson, H.4 aut |
| 700 | 1 | a Palsson, F.4 aut |
| 700 | 1 | a Sturkell, Erik,d 1962u Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences4 aut0 (Swepub:gu)xstuer |
| 700 | 1 | a Bean, C. J.4 aut |
| 700 | 1 | a Mollhoff, M.4 aut |
| 700 | 1 | a Braiden, A. K.4 aut |
| 700 | 1 | a Eibl, E. P. S.4 aut |
| 710 | 2 | a Göteborgs universitetb Institutionen för geovetenskaper4 org |
| 773 | 0 | t Natured : Springer Science and Business Media LLCg 517:7533q 517:7533x 0028-0836x 1476-4687 |
| 856 | 4 | u http://eprints.whiterose.ac.uk/96998/1/Sigmundsson_et_al_Open_Access.pdf |
| 856 | 4 8 | u https://gup.ub.gu.se/publication/212200 |
| 856 | 4 8 | u https://doi.org/10.1038/nature14111 |
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