Letter | Published:

Least radiogenic terrestrial lead from Isua, West Greenland

Nature volume 272, pages 524526 (06 April 1978) | Download Citation

Subjects

Abstract

FIELD relationships and geochronological data have shown that the metamorphosed supracrustal rocks of the Isua area are the oldest known components of the Archaean complex of West Greenland1–4. Rb–Sr, U–Pb and Pb/Pb ages in the range 3,700–3,800 Myr have been reported from various units within the Isua supracrustals5–9. One of us (P.W.U.A.) has recently discovered occurrences of sulphide mineralisation, including galena, within the Isua supracrustals. Here we describe these occurrences and report Pb isotopic analyses for several galenas, one of which is uniquely unradiogenic for a terrestrial rock in both 206Pb/204Pb and 207Pb/204Pb ratios. Until now the least radiogenic ore leads came from the Barberton Mountain Land of southern Africa (see refs 10, 11) and from the Pilhara Goldfield region of Western Australia12. The least radiogenic rock leads have been reported from the 3,600–3,700-Myr-old Amîtsoq gneisses of West Greenland13–15.

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.

    & Geol. Surv. Greenland, Rep. no. 65 49 (1974).

  2. 2.

    , , & in Geology of Greenland (eds Escher, A. & Watt, W. S.) (Geological Survey of Greenland, Copenhagen, 1976).

  3. 3.

    Geol. Surv. Greenland, Rep. no. 75, 53 (1975).

  4. 4.

    in The Early History of the Earth (ed. Windley, B. F.) (Wiley, London, 1976).

  5. 5.

    , & Nature 245, 138 (1973).

  6. 6.

    , & Earth planet. Sci. Lett. 27, 229 (1975).

  7. 7.

    Earth planet. Sci. Lett. 33, 261 (1976).

  8. 8.

    , , & Earth planet. Sci. Lett. 35, 449 (1977).

  9. 9.

    , , & Nature 270, 43 (1977).

  10. 10.

    & Geochim. cosmochim. Acta 37, 1823 (1973).

  11. 11.

    & Econ. Geol. 71, 44 (1976).

  12. 12.

    & Nature 270, 423 (1977).

  13. 13.

    , , , & Earth planet. Sci. Lett. 12, 245 (1971).

  14. 14.

    , & Geochim. cosmochim. Acta 40, 513 (1976).

  15. 15.

    & Geochim. cosmochim. Acta 41, 1283 (1977).

  16. 16.

    N.Jb. Miner. Mh. 11, 521 (1977).

  17. 17.

    Can. J. Earth Sci. 13, 816 (1976).

  18. 18.

    & Analyt. Chem. 46, 2 (1974).

  19. 19.

    Nature 248, 132 (1974).

  20. 20.

    , , , & Phys. Rev. C4, 1889 (1971).

  21. 21.

    , & Science 180, 1279 (1973).

Download references

Author information

Affiliations

  1. Max-Planck-Institut für Chemie, D-6500 Mainz, FRG

    • P. W. U. APPEL
  2. Department of Geology and Mineralogy, University of Oxford, Oxford, UK

    • S. MOORBATH
    •  & P. N. TAYLOR

Authors

  1. Search for P. W. U. APPEL in:

  2. Search for S. MOORBATH in:

  3. Search for P. N. TAYLOR in:

About this article

Publication history

Received

Accepted

Published

DOI

https://doi.org/10.1038/272524a0

Further reading 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.