Micrometre-scale deformation observations reveal fundamental controls on geological rifting

DC FieldValueLanguage
dc.contributor.authorThun, Johannes-
dc.contributor.authorLokmer, Ivan-
dc.contributor.authorBean, Christopher J.-
dc.contributor.authorEibl, Eva P. S.-
dc.contributor.authoret al.-
dc.date.accessioned2021-09-14T09:30:58Z-
dc.date.available2021-09-14T09:30:58Z-
dc.date.copyright2016 the Authorsen_US
dc.date.issued2016-11-09-
dc.identifier.citationScientific Reportsen_US
dc.identifier.issn2045-2322-
dc.identifier.urihttp://hdl.handle.net/10197/12468-
dc.description.abstractMany of the world's largest volcanic eruptions are associated with geological rifting where major fractures open at the Earth's surface, yet fundamental controls on the near-surface response to the rifting process are lacking. New high resolution observations gleaned from seismometer data during the 2014 Bároarbunga basaltic dyke intrusion in Iceland allow us unprecedented access to the associated graben formation process on both sub-second and micrometre scales. We find that what appears as quasi steady-state near-surface rifting on lower resolution GPS observation comprises discrete staccato-like deformation steps as the upper crust unzips through repetitive low magnitude (M < 0) failures on fracture patches estimated between 300 m and 1200 m in size. Stress drops for these events are one to two orders of magnitude smaller than expected for tectonic earthquakes, demonstrating that the uppermost crust in the rift zone is exceptionally weak.en_US
dc.description.sponsorshipEuropean Commission - Seventh Framework Programme (FP7)en_US
dc.format.mediumElectronic-
dc.language.isoenen_US
dc.publisherSpringer Natureen_US
dc.rightsThis work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/en_US
dc.subjectCentral Icelanden_US
dc.subjectDike intrusionen_US
dc.subjectVolcanoen_US
dc.subjectEruptionen_US
dc.subjectWavesen_US
dc.subjectShearen_US
dc.titleMicrometre-scale deformation observations reveal fundamental controls on geological riftingen_US
dc.typeJournal Articleen_US
dc.internal.authorcontactotherivan.lokmer@ucd.ieen_US
dc.statusPeer revieweden_US
dc.identifier.volume6en_US
dc.identifier.issue1en_US
dc.citation.otherArticle Number: 36676en_US
dc.identifier.doi10.1038/srep36676-
dc.neeo.contributorThun|Johannes|aut|-
dc.neeo.contributorLokmer|Ivan|aut|-
dc.neeo.contributorBean|Christopher J.|aut|-
dc.neeo.contributorEibl|Eva P. S.|aut|-
dc.neeo.contributoret al.||aut|-
dc.description.othersponsorshipGeological Survey of Ireland (GSI)en_US
dc.date.updated2021-04-30T11:53:00Z-
dc.identifier.grantid289976-
dc.identifier.grantid308377-
dc.rights.licensehttps://creativecommons.org/licenses/by/3.0/ie/en_US
item.fulltextWith Fulltext-
item.grantfulltextopen-
Appears in Collections:Earth Sciences Research Collection
Files in This Item:
 File SizeFormat
DownloadMicrometre-scale deformation observations reveal fundamental controls on geological rifting.pdf984.56 kBAdobe PDF
Show simple item record

Page view(s)

84
Last Week
4
Last month
checked on Oct 22, 2021

Download(s)

6
checked on Oct 22, 2021

Google ScholarTM

Check

Altmetric


If you are a publisher or author and have copyright concerns for any item, please email research.repository@ucd.ie and the item will be withdrawn immediately. The author or person responsible for depositing the article will be contacted within one business day.