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dc.date.accessioned2018-07-02T12:06:02Z
dc.date.available2018-07-02T12:06:02Z
dc.date.created2014-03-22T20:17:24Z
dc.date.issued2013
dc.identifier.citationO'Connor, John M. Steinberger, Bernhard Regelous, Marcel Koppers, Anthony A.P. Wijbrans, Jan R. Haase, Karsten M. Stoffers, Peter Jokat, Wilfried Garbe-Schönberg, Dieter . Constraints on past plate and mantle motion from new ages for the Hawaiian-Emperor Seamount Chain. Geochemistry Geophysics Geosystems. 2013, 14(10), 4564-4584
dc.identifier.urihttp://hdl.handle.net/10852/61995
dc.description.abstractEstimates of the relative motion between the Hawaiian and Louisville hot spots have consequences for understanding the role and character of deep Pacific‐mantle return flow. The relative motion between these primary hot spots can be inferred by comparing the age records for their seamount trails. We report 40Ar/39Ar ages for 18 lavas from 10 seamounts along the Hawaiian‐Emperor Seamount Chain (HESC), showing that volcanism started in the sharp portion of the Hawaiian‐Emperor Bend (HEB) at ≥47.5 Ma and continued for ≥5 Myr. The slope of the along‐track distance from the currently active Hawaiian hot spot plotted versus age is constant (57 ± 2 km/Myr) between ∼57 and 25 Ma in the central ∼1900 km of the seamount chain, including the HEB. This model predicts an age for the oldest Emperor Seamounts that matches published ages, implying that a linear age‐distance relationship might extend back to at least 82 Ma. In contrast, Hawaiian age progression was much faster since at least ∼15 Ma and possibly as early as ∼27 Ma. Linear age‐distance relations for the Hawaii‐Emperor and Louisville seamount chains predict ∼300 km overall hot spot relative motion between 80 and 47.5 Ma, in broad agreement with numerical models of plumes in a convecting mantle, and paleomagnetic data. We show that a change in hot spot relative motion may also have occurred between ∼55 Ma and ∼50 Ma. We interpret this change in hot spot motion as evidence that the HEB reflects a combination of hot spot and plate motion changes driven by the same plate/mantle reorganization. This research was originally published in Geochemistry, Geophysics, Geosystems. © 2013 American Geophysical Unionen_US
dc.languageEN
dc.publisherThe Geochemical Society
dc.titleConstraints on past plate and mantle motion from new ages for the Hawaiian-Emperor Seamount Chainen_US
dc.typeJournal articleen_US
dc.creator.authorO'Connor, John M.
dc.creator.authorSteinberger, Bernhard
dc.creator.authorRegelous, Marcel
dc.creator.authorKoppers, Anthony A.P.
dc.creator.authorWijbrans, Jan R.
dc.creator.authorHaase, Karsten M.
dc.creator.authorStoffers, Peter
dc.creator.authorJokat, Wilfried
dc.creator.authorGarbe-Schönberg, Dieter
cristin.unitcode185,15,22,40
cristin.unitnameSenter for Jordens utvikling og dynamikk
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2
dc.identifier.cristin1124012
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Geochemistry Geophysics Geosystems&rft.volume=14&rft.spage=4564&rft.date=2013
dc.identifier.jtitleGeochemistry Geophysics Geosystems
dc.identifier.volume14
dc.identifier.issue10
dc.identifier.startpage4564
dc.identifier.endpage4584
dc.identifier.doihttp://dx.doi.org/10.1002/ggge.20267
dc.identifier.urnURN:NBN:no-64581
dc.type.documentTidsskriftartikkelen_US
dc.type.peerreviewedPeer reviewed
dc.source.issn1525-2027
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/61995/1/O%2527Connor_et_al-2013-Geochemistry%252C_Geophysics%252C_Geosystems.pdf
dc.type.versionPublishedVersion


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