Helium isotope variations in Juan De Fuca Ridge basalts

  title={Helium isotope variations in Juan De Fuca Ridge basalts},
  author={John Edward Lupton and David W. Graham and John R. Delaney and Hans P. Johnson},
We have measured ³He/4He ratios and He and Ne concentrations on a suite of 24 basalt glasses from the neovolcanic zone of the Juan de Fuca Ridge (JdFR) from 44.6°N near the Blanco Transform up to 48.0°N on the Endeavour Segment. The helium isotope ratios exhibit a clear geographic variation, with relatively constant values of 7.8 RA along the southern JdFR increasing to a maximum of 8.8 RA at 46.9°N on the Cobb Segment, and then dropping to values of ∼8.0 RA at the Cobb Offset. Ratios along the… CONTINUE READING

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Publications referenced by this paper.

Petrology and geochemistry of basalts from the southern Juan de Fuca Ridge : controls on the spatial and temporal evolution of MORB

  • M. C.. MR. Perfit Smith
  • 1993

Experimental determination of U and Th partitioning between clinopyroxene and natural and synthetic basaltic liquid

  • T. Z. LaTourette, D. S. Burnett
  • Earth Planet . Sc ! . Leo
  • 1992

Spatial and temporal evolution of magmatic systems beneath the Endeavour Segment , Juan de Fuca Ridge : tectonic and petrologic constraints , )

  • J. L.. J. R. Delaney Karsten, J. M. Rhodes, R. A. Liias
  • Geophys . Ret
  • 1990