Seismic reflection images of a near-axis melt sill within the lower crust at the Juan de Fuca ridge

J. Pablo Canales (), Mladen R. Nedimović, Graham M. Kent, Suzanne M. Carbotte and Robert S. Detrick
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J. Pablo Canales: Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA
Mladen R. Nedimović: Dalhousie University, Halifax, Nova Scotia B3H 4J1, Canada
Graham M. Kent: Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, USA
Suzanne M. Carbotte: Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964, USA
Robert S. Detrick: Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA

Nature, 2009, vol. 460, issue 7251, 89-93

Abstract: Crust accretion The style of accretion of the lower oceanic crust at mid-ocean ridges is disputed, with some models proposing that the lower oceanic crust is accreted from melt sills intruded at multiple levels within the lower crust. Until now, however, seismic images of molten sills within the lower crust have been elusive. Canales et al. report deep crustal seismic reflections off the southern Juan de Fuca Ridge, which they interpret as originating from a molten sill currently forming within the lower oceanic crust.

Date: 2009
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DOI: 10.1038/nature08095

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