PB-, SR-, AND ND-ISOTOPIC EVOLUTION OF THE LAU BASIN : IMPLICATIONS FOR MANTLE DYNAMICS DURING BACKARC OPENING

@inproceedings{Hergt2006PBSA,
  title={PB-, SR-, AND ND-ISOTOPIC EVOLUTION OF THE LAU BASIN : IMPLICATIONS FOR MANTLE DYNAMICS DURING BACKARC OPENING},
  author={Janet M. Hergt and Christopher J. Hawkesworth},
  year={2006}
}
New Pb, Sr, and Nd isotope data are presented for 64 samples from the six backarc sites drilled during Leg 135. Systematic changes in Pb and Sr compositions illustrate significant isotopic variations between and within sites as well as provide two key pieces of information. First, a recent influx of asthenosphere with Indian Ocean mantle affinities has occurred and has successfully displaced older "Pacific" asthenosphere from the mantle underlying the backarc region. Second, clear evidence… CONTINUE READING

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