Letter | Published:

Melting of peridotite at uppermost lower-mantle conditions

Naturevolume 328pages514517 (1987) | Download Citation

Subjects

Abstract

An episode of extensive melting early in Earth's history has been postulated on several grounds, but is still controversial1–9. To investigate the effects of such a 'magma ocean', we have melted a mantle peridotite at conditions equivalent to those obtaining at the top of the lower mantle (25 GPa, 2,000–3,000 °C). As predicted10,11, MgSiO3-rich perovskite is the liquidus phase. A small amount of CaSiO3-rich perovskite12 was observed, and may be the second liquidus phase. Using the Mg/Si, Al/Si, Ca/Si and Ca/Al ratios as constraints, we show that primitive upper-mantle compositions1,13–15 can be derived from a chondritic source with a small degree of MgSiO3-perovskite fractionation (10–20 wt %).

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1

    1. Ringwood, A. E. Origin of the Earth and Moon (Springer, New York, 1979). 2. Basaltic Volcanism Study Project. Basaltic Volcanism on the Terrestrial Planets (Pergamon, New York, 1981). 3. Zindler, A. & Hart, S. R. A. Rev. Earth planet. Sci. 14, 493–571 (1986). 4. Anderson, D. / geophys. Res. 84, 6297–6298 (1979). 5. Anderson, D. & Bass, J. D. Nature 320, 321–328 (1986). 6. Nisbet, E. G. & Walker, D. Earth planet. Sci. Lett. 60, 103–113 (1982). 7. Ohtani, E. Phys. Earth planet. Inter. 38, 70–80 (1985). 8. Herzberg, C. T. & O'Hara, M. J. Geophys. Res. Lett. 12, 541–544 (1985). 9. Takahashi, E. J geophys. Res. 91, 9367–9382 (1986). 10. Kumazawa, M. (abstr.) Intern. Geodynamics Conf. Tokyo, 276–277 (1978). 11. Ohtani, E., Phys. Earth planet. Inter. 33, 12–25 (1983). 12. Liu, L. & Ringwood, A. E. Earth planet. Sci. Lett. 28, 209–211 (1975). 13. Jagoutz, E. et al. Proc. lunar planet. Sci. Conf. 10, 2031–2050 (1979). 14. Sun, S. S. Geochim. cosmochim. Acta 46, 179–192 (1982). 15. Palme, H. & Nickel, K. G. Geochim. cosmochim. Acta 49, 2123–2132 (1985). 16. Ito, E., Takahashi, E. & Matsui, Y. Earth planet. Sci. Lett. 67, 238–248 (1984). 17. Ito, E. & Yamada, H. in High–Pressure Research in Geophysics (ed. Akimoto, S.) 405–419 (Reidel, Dordrecht, 1982). 18. Ito, E. & Takahashi, E. in High Pressure Research Applications in Geophysics and Geochemistry (ed. Manghnani, M. H.) (American Geophysical Union, Washington, 1987). 19. Takahashi, E. & Scarfe, C. M. Nature 315, 566–568 (1985). 20. Scarfe, C. M. & Takahashi, E. Nature 322, 354–356 (1986). 21. Takahashi, E. & Ito, E. in High Pressure Research Applications in Geophysics and Geochemistry (ed. Manghnani, M. H.) (American Geophysical Union, Washington, 1987). 22. Nixon, P. H. & Boyd, F. R. in Lesotho Kimberlites (ed. Nixon, P. H.) (Lesotho National Development Corporation, Maseru, 1973). 23. Kato, T. & Kumazawa, M. Geophys. Res. Lett. 13, 181–184 (1986). 24. Ohtani, E., Kato, T. & Sawamoto, H. Nature 322, 352–353 (1986). 25. Irifune, T. & Ringwood, A. E. in High Pressure Research Applications in Geophysics and Geochemistry (ed. Manghnani, M. H.) (American Geophysical Union, Washington, 1987). 26. Ringwood, A. E. & Kesson, S. E. The Moon 16, 425–464 (1977). 27. Walker, D. Contr. Miner. Petrol. 92, 303–307 (1986). 28. Maal0e, S. & Aoki, K. Contr. Miner. Petrol. 63, 161–173 (1977). 29. Kato, T., Irifune, T. & Ringwood, A. E. Geophys. Res. Lett. 14, 546–549 (1987). 30. Kato, T., Irifune, T. & Ringwood, A. E. Lunar Sci. Conf. Abstr. 18, 483–484 (1987). 31. Morgan, J. W. & Anders, E. Proc. natn. Acad. Sci. U.S.A. 77, 6973–6977 (1980).

Download references

Author information

Affiliations

  1. Institute for Study of the Earth's Interior, Okayama University, Misasa, Tottori-ken, 682-02, Japan

    • Eiji Ito
    •  & Eiichi Takahashi

Authors

  1. Search for Eiji Ito in:

  2. Search for Eiichi Takahashi in:

About this article

Publication history

Received

Accepted

Issue Date

DOI

https://doi.org/10.1038/328514a0

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.