Upper-mantle dynamics revealed by helium isotope variations along the southeast Indian ridge

@article{Graham2001UppermantleDR,
  title={Upper-mantle dynamics revealed by helium isotope variations along the southeast Indian ridge},
  author={David W. Graham and John E. Lupton and Frank J. Spera and David M. Christie},
  journal={Nature},
  year={2001},
  volume={409},
  pages={701-703}
}
Helium isotope variations in igneous rocks are important for relating isotopic heterogeneity to convective mixing in the Earth's mantle. High 3He/4He ratios at many ocean islands, along with lower and relatively uniform values in mid-ocean-ridge basalts (MORBs), are thought to result from a well mixed upper-mantle source for MORB and a distinct deeper… CONTINUE READING