Small-scale structure of the Kane oceanic core complex, Mid-Atlantic Ridge 23°30′N, from waveform tomography of multichannel seismic data

Details Small-scale structure of the Kane oceanic core complex, Mid-Atlantic Ridge 23°30′N, from waveform tomography of multichannel seismic data Small-scale structure of the Kane oceanic core complex, Mid-Atlantic Ridge 23°30′N, from waveform tomography of multichannel seismic data

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3721305c&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 21, CiteID L21305

Physics

Geophysics

2

Seismology: Mid-Ocean Ridges, Seismology: Oceanic Crust, Marine Geology And Geophysics: Midocean Ridge Processes, Marine Geology And Geophysics: Seafloor Morphology, Geology, And Geophysics

Scientific paper

Frequency-domain waveform tomography applied to deep-sea multichannel seismic data collected across the Kane oceanic core complex (OCC) reveals the small-scale structure of this section of oceanic lithosphere formed at the Mid-Atlantic Ridge 3.3-2.1 Myr ago that has been uplifted and exhumed at the seafloor along an oceanic detachment fault. Geological and geophysical studies indicate that the central-eastern area of the Kane OCC is formed by a large gabbroic intrusion. The new high-resolution seismic velocity models show that this gabbroic core is 1,000-1,350 m thick and it is underlain by a ˜300-m-thick layer of low-velocity material interpreted as serpentinized peridotite. The models also reveal the presence of a deeper, 200-m-thick by 1,700-m-long high-velocity body interpreted as a small gabbroic sill embedded in serpentinzed peridotite.

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