Interaction between central volcanoes and regional tectonics along divergent plate boundaries: Askja, Iceland

Handle URI:
http://hdl.handle.net/10754/626791
Title:
Interaction between central volcanoes and regional tectonics along divergent plate boundaries: Askja, Iceland
Authors:
Trippanera, Daniele ( 0000-0002-7028-3566 ) ; Ruch, Joel; Acocella, Valerio; Thordarson, Thor; Urbani, Stefano
Abstract:
Activity within magmatic divergent plate boundaries (MDPB) focuses along both regional fissure swarms and central volcanoes. An ideal place to investigate their mutual relationship is the Askja central volcano in Iceland. Askja consists of three nested calderas (namely Kollur, Askja and Öskjuvatn) located within a hyaloclastite massif along the NNE-SSW trending Icelandic MDPB. We performed an extensive field-based structural analysis supported by a remote sensing study of tectonic and volcanic features of Askja’s calderas and of the eastern flank of the hyaloclastite massif. In the massif, volcano-tectonic structures trend N 10° E to N 40° E, but they vary around the Askja caldera being both parallel to the caldera rim and cross-cutting on the Western side. Structural trends around the Öskjuvatn caldera are typically rim parallel. Volcanic vents and dikes are preferentially distributed along the caldera ring faults; however, they follow the NNE-SSW regional structures when located outside the calderas. Our results highlight that the Askja volcano displays a balanced amount of regional (fissure-swarm related) and local (shallow-magma-chamber related) tectonic structures along with a mutual interaction among these. This is different from Krafla volcano (to the north of Askja) dominated by regional structures and Grímsvötn (to the South) dominated by local structures. Therefore, Askja represents an intermediate tectono-magmatic setting for volcanoes located in a slow divergent plate boundary. This is also likely in accordance with a northward increase in the spreading rate along the Icelandic MDPB.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Trippanera D, Ruch J, Acocella V, Thordarson T, Urbani S (2017) Interaction between central volcanoes and regional tectonics along divergent plate boundaries: Askja, Iceland. Bulletin of Volcanology 80. Available: http://dx.doi.org/10.1007/s00445-017-1179-8.
Publisher:
Springer Nature
Journal:
Bulletin of Volcanology
Issue Date:
4-Dec-2017
DOI:
10.1007/s00445-017-1179-8
Type:
Article
ISSN:
0258-8900; 1432-0819
Sponsors:
We thank the Icelandic Met Office (IMO) and the University of Iceland for providing us the possibility to use their infrastructure that allowed us to perform the field survey along with the online open access dataset. A. Gudmundsson and an anonymous reviewer provided constructive and helpful suggestions.
Additional Links:
http://link.springer.com/article/10.1007/s00445-017-1179-8
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorTrippanera, Danieleen
dc.contributor.authorRuch, Joelen
dc.contributor.authorAcocella, Valerioen
dc.contributor.authorThordarson, Thoren
dc.contributor.authorUrbani, Stefanoen
dc.date.accessioned2018-01-15T06:35:09Z-
dc.date.available2018-01-15T06:35:09Z-
dc.date.issued2017-12-04en
dc.identifier.citationTrippanera D, Ruch J, Acocella V, Thordarson T, Urbani S (2017) Interaction between central volcanoes and regional tectonics along divergent plate boundaries: Askja, Iceland. Bulletin of Volcanology 80. Available: http://dx.doi.org/10.1007/s00445-017-1179-8.en
dc.identifier.issn0258-8900en
dc.identifier.issn1432-0819en
dc.identifier.doi10.1007/s00445-017-1179-8en
dc.identifier.urihttp://hdl.handle.net/10754/626791-
dc.description.abstractActivity within magmatic divergent plate boundaries (MDPB) focuses along both regional fissure swarms and central volcanoes. An ideal place to investigate their mutual relationship is the Askja central volcano in Iceland. Askja consists of three nested calderas (namely Kollur, Askja and Öskjuvatn) located within a hyaloclastite massif along the NNE-SSW trending Icelandic MDPB. We performed an extensive field-based structural analysis supported by a remote sensing study of tectonic and volcanic features of Askja’s calderas and of the eastern flank of the hyaloclastite massif. In the massif, volcano-tectonic structures trend N 10° E to N 40° E, but they vary around the Askja caldera being both parallel to the caldera rim and cross-cutting on the Western side. Structural trends around the Öskjuvatn caldera are typically rim parallel. Volcanic vents and dikes are preferentially distributed along the caldera ring faults; however, they follow the NNE-SSW regional structures when located outside the calderas. Our results highlight that the Askja volcano displays a balanced amount of regional (fissure-swarm related) and local (shallow-magma-chamber related) tectonic structures along with a mutual interaction among these. This is different from Krafla volcano (to the north of Askja) dominated by regional structures and Grímsvötn (to the South) dominated by local structures. Therefore, Askja represents an intermediate tectono-magmatic setting for volcanoes located in a slow divergent plate boundary. This is also likely in accordance with a northward increase in the spreading rate along the Icelandic MDPB.en
dc.description.sponsorshipWe thank the Icelandic Met Office (IMO) and the University of Iceland for providing us the possibility to use their infrastructure that allowed us to perform the field survey along with the online open access dataset. A. Gudmundsson and an anonymous reviewer provided constructive and helpful suggestions.en
dc.publisherSpringer Natureen
dc.relation.urlhttp://link.springer.com/article/10.1007/s00445-017-1179-8en
dc.subjectAskja volcanoen
dc.subjectCalderaen
dc.subjectRiften
dc.subjectMagmatic divergent plate boundaryen
dc.subjectEruptive fissuresen
dc.subjectDikesen
dc.titleInteraction between central volcanoes and regional tectonics along divergent plate boundaries: Askja, Icelanden
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalBulletin of Volcanologyen
dc.contributor.institutionDipartimento di Scienze, Roma Tre, Rome, Italyen
dc.contributor.institutionFaculty of Earth Sciences, University of Iceland, Reykjavik, Icelanden
kaust.authorRuch, Joelen
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