Geochemistry, Geophysics, Geosystems


    1. Detailed volcanostratigraphy of an accreted seamount: Implications for intraplate seamount formation

      Susan R. Schnur and Lisa A. Gilbert

      Article first published online: 7 DEC 2012 | DOI: 10.1029/2012GC004301

      Key Points

      • NRT seamount volcanostratigraphy is representative of intraplate seamounts
      • Large, complex seamounts have a variety of facies and thus a lower density
      • Pillow lavas dominate small seamounts and large seamount cores
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      Large volumes of rejuvenated volcanism in Samoa: Evidence supporting a tectonic influence on late-stage volcanism

      Jasper G. Konter and Matthew G. Jackson

      Article first published online: 1 JUN 2012 | DOI: 10.1029/2011GC003974

      Key Points

      • Volume of Samoan rejuvenated lavas constrained for the first time
      • Rejuvenated lava composition explained as a mixture of MORB, Rarotonga, Samoa
      • Flexure-driven melts of metasomatized lithosphere explain observations
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      Correction to “Lithospheric control on geochemical composition along the Louisville Seamount Chain”

      Christoph Beier, Loÿc Vanderkluysen, Marcel Regelous, John J. Mahoney and Dieter Garbe-Schönberg

      Article first published online: 27 JAN 2012 | DOI: 10.1029/2011GC004012

      This article corrects:

      Lithospheric control on geochemical composition along the Louisville Seamount Chain

      Vol. 12, Issue 9, Article first published online: 30 SEP 2011

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      New 40Ar/39Ar age progression for the Louisville hot spot trail and implications for inter–hot spot motion

      Anthony A. P. Koppers, Molly D. Gowen, Lauren E. Colwell, Jeffrey S. Gee, Peter F. Lonsdale, John J. Mahoney and Robert A. Duncan

      Article first published online: 30 DEC 2011 | DOI: 10.1029/2011GC003804

      Key Points

      • Ages provide evidence for a systematic age-progressive trend from 71 to 21 Ma
      • Indications for a more eastern location of the present-day Louisville hot spot
      • APM models taking into account hot spot motion provide best fit to seamount ages
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      Lithospheric control on geochemical composition along the Louisville Seamount Chain

      Christoph Beier, Loÿc Vanderkluysen, Marcel Regelous, John J. Mahoney and Dieter Garbe-Schönberg

      Article first published online: 30 SEP 2011 | DOI: 10.1029/2011GC003690

      Key Points

      • Composition of magmas was remarkably uniform over a  ∼30–40 Myr period
      • Smaller melting degrees are the result of increased lithosphere thickness
      • No evolutionary stages of the Louisville Seamount Chain volcanoes
      Corrected by:

      Correction to “Lithospheric control on geochemical composition along the Louisville Seamount Chain”

      Vol. 13, Issue 1, Article first published online: 27 JAN 2012

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