Geochronology of Galapagos seamounts Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/n009w3816

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  • Lavas from seamounts of the central Galápagos Platform and the Carnegie Ridge increase in age with distance from the western edge of the platform, consistent with a hotspot model for the generation of these features. The areal distribution of seamount ages suggests that the pattern of dispersed volcanism seen on the present islands also prevailed between 5 and 6 Ma. Age-distance relationships are consistent with a decrease in the velocity of the Nazca plate relative to the Galápagos hotspot during the past 9 m.y., most likely at ~5 Ma when there was a change in Pacific-hotspot motion. Alternatively, the plate velocity remained constant and volcanism at a single seamount endured up to 7 m.y. lavas from seamounts along the Wolf-Darwin lineament to the northwest of the Galápagos Platform are young (<1 Ma), with the youngest measured ages closest to the platform.
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  • Sinton, C.W., Christie, D.M., and Duncan, R.A., 1996, Geochronology of Galápagos seamounts. Journal of Geophysical Research, Vol. 101, Pg. 13,689–13,700.
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  • description.provenance : Submitted by Linda Lamb (llamb@coas.oregonstate.edu) on 2010-04-12T23:47:36Z No. of bitstreams: 1 Sinton_et_al_JGR_1996.pdf: 945329 bytes, checksum: 9c57397bc463fff0e4c870c7ce3fbd3a (MD5)
  • description.provenance : Made available in DSpace on 2010-04-13T12:50:46Z (GMT). No. of bitstreams: 1 Sinton_et_al_JGR_1996.pdf: 945329 bytes, checksum: 9c57397bc463fff0e4c870c7ce3fbd3a (MD5) Previous issue date: 1996-06-10
  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2010-04-13T12:50:46Z (GMT) No. of bitstreams: 1 Sinton_et_al_JGR_1996.pdf: 945329 bytes, checksum: 9c57397bc463fff0e4c870c7ce3fbd3a (MD5)
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  • 0148-0227

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