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dc.contributor.authorTan, Pingchuan
dc.contributor.authorBreivik, Asbjørn Johan
dc.contributor.authorTrønnes, Reidar G
dc.contributor.authorMjelde, Rolf
dc.contributor.authorAzuma, Ryosuke
dc.contributor.authorEide, Sigurd
dc.date.accessioned2018-06-27T12:18:38Z
dc.date.available2018-06-27T12:18:38Z
dc.date.issued2017-01
dc.identifier.citationTan P, Breivik AJ, Trønnes RG, Mjelde R, Azuma R, Eide S. Crustal structure and origin of the Eggvin Bank west of Jan Mayen, NE Atlantic. Journal of Geophysical Research - Solid Earth. 2017;122(1):43-62eng
dc.identifier.urihttp://hdl.handle.net/1956/17841
dc.description.abstractThe Eggvin Bank, located between the Jan Mayen Island and Greenland, is an unusually shallow area containing several submarine volcanic peaks, confined by two transforms on the Northern Kolbeinsey Ridge (NKR). We represent P and S wave velocity models for the Eggvin Bank based on an Ocean Bottom Seismometer profile collected in 2011, showing igneous crustal thickness variations from 8 km to 13 km. A 2–5 km increase is associated with two separate 20–30 km wide segments under the main seamounts. The oceanic crust has three layers: upper crust (L2A: 2.8–4.8 km/s), middle crust (L2B: 5.5–6.5 km/s), and lower crust (L3: 6.7–7.35 km/s). Both the thick layer 2(A/B) and the high ratio of layer 2(A/B) thickness to total crustal thickness indicate that secondary, intraplate magmatism built the seamounts of the Eggvin Bank. The seamount in the north where the crust is thickest has a flat top indicating subaerial exposure but is deeper than those with rounded tops in the south and is therefore probably older. Comparing lower crustal seismic velocity with crustal thickness also indicates that the degree of mantle melting may be higher in the north than in the south. An enriched mantle source presently feeds the NKR magmatism and probably influenced the Eggvin Bank development also at earlier times. To what extent the Eggvin Bank has been influenced by the Iceland plume is uncertain, both an enriched mantle component and elevated mantle temperature may have played a role at different times and locations.eng
dc.language.isoengeng
dc.publisherAmerican Geophysical Unioneng
dc.relation.urihttp://dx.doi.org/10.1002/2016JB013495
dc.titleCrustal structure and origin of the Eggvin Bank west of Jan Mayen, NE Atlanticeng
dc.typeJournal articleeng
dc.date.updated2018-01-31T11:47:58Z
dc.rights.holderCopyright 2016. American Geophysical Union. All Rights Reservedeng
dc.type.versionpublishedVersioneng
bora.peerreviewedPeer reviewedeng
dc.type.documentJournal article
dc.identifier.cristinID1421511
dc.identifier.doi10.1002/2016JB013495eng
dc.source.issn2169-9313eng
dc.source.issn2169-9356eng
dc.relation.projectIDNorges forskningsråd: 223272
dc.relation.journalJournal of Geophysical Research - Solid Earth


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