High precision Hf isotope measurements of MORB and OIB by thermal ionisation mass spectrometry: insights into the depleted mantle

@inproceedings{Nowell1998HighPH,
  title={High precision Hf isotope measurements of MORB and OIB by thermal ionisation mass spectrometry: insights into the depleted mantle},
  author={Geoff M. Nowell and Pamela D. Kempton and Stephen R. Noble and J. Godfrey Fitton and Ad D. Saunders and John J. Mahoney and R. Neil Taylor},
  year={1998}
}
The existing Hf isotope database for mid-ocean ridge basalts (MORB) is limited in both quantity and precision. Nevertheless, in Hf–Nd isotope space, MORBs show a wide variation in / over a relatively restricted range in /. The highest / ratios (?0.283355) within the MORB range are restricted to just four samples (<6.5% of total). Of these high / MORBs, three are from ridge segments adjacent to known active plumes and one is from a ridge segment for which a plume influence has been suggested. By… CONTINUE READING

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