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- GP33B-0323: Quantifying the origin of Haxby Lineaments using a combination of magnetotelluric, gravity, and bathymetry data
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Board 0323‚ Hall EFG (Poster Hall)NOLA CC
Author(s):Generic 'disconnected' Message
Josephine Joergensen, Scripps Institution of Oceanography (First Author, Presenting Author)
Steven Constable, University of California San Diego
David Sandwell, Scripps Institution of Oceanography, University of California San Diego
Over the Pacific Ocean, there are anomalous alternating positive and negative stripes in the strength of gravitational acceleration. We still don’t understand where these stripes originate, and multiple theories have been suggested. We used a method that takes measurements of the electric and magnetic fields on the seafloor, as it is well equipped to image structure beneath the seafloor. Our early results using this method show blobs of hot material beneath the positive gravity stripes, and cold material beneath the negative gravity stripes. These results have allowed us to distinguish between the possible theories and identify the most likely origin of the gravity rolls. The implications of this project will inform about the mechanism of melting beneath earth’s crust, and might explain how underwater volcanoes away from plate boundaries and mantle plumes are supplied with magma.
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