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Rb-Sr and U-Pb isotopic ages of granites in the central Transantarctic Mountains

Published online by Cambridge University Press:  01 May 2009

J. Gunner  and
J. M. Mattinson
J. Gunner
Affiliation:
Geology SectionCambridgeshire College of Arts & TechnologyCollier Road, Cambridge
J. M. Mattinson
Affiliation:
Dept. of Geological SciencesUniversity of CaliforniaSanta Barbara, California 93106.
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Summary

Granitic rocks in the central Transantarctic Mountains were emplaced and crystallized during the Early Ordovician Period, as indicated by Rb-Sr whole-rock isochron dates (488 and 463 Ma) and a concordant U-Pb date on sphene (476 Ma). Other U-Pb data provide evidence for an old inherited component of zircon in the granites.

Type
Articles
Information
Geological Magazine , Volume 112 , Issue 1 , January 1975 , pp. 25 - 31
Copyright
Copyright © Cambridge University Press 1975

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References

Barrett, P. J., Lindsay, J. F. & Gunner, J. 1970. Reconnaissance geologic map of the Mount Rabot quadrangle, Transantarctic Mountains, Antarctica. Antarctic Map U.S. geol. Surv. A-1.Google Scholar
Grindley, G. W. & Laird, M. G. 1969. Shackleton Coast. In Bushnell, V. C. (Ed.): Geologic map of Antarctica, 1:1,000,000, Sheet 15, Amer. geogr. Soc., New York.Google Scholar
Grindley, G. W., McGregor, V. R. & Walcott, R. I. 1964. Outline of the geology of the Nimrod-Beardmore-Axel Heiberg region, Ross Dependency, Antarctica. In Adie, R. J. (Ed.): Antarctic geology, pp. 206–18. North-Holland, Amsterdam.Google Scholar
Gunn, B. M. & Walcott, R. I. 1962. The geology of the Mount Markham region, Ross Dependency, Antarctica. N.Z. Jl Geol. Geophys. 5, 407–26.CrossRefGoogle Scholar
Gunner, J. (in the press). Basement geology of the Beardmore Glacier region. In Splettstoesser, J. F. & Turner, M. D. (Eds): Geology of the central Transantarctic Mountains, Amer. geophys. Union, Washington, D.C.Google Scholar
Gunner, J. & Faure, G. 1972. Rb-Sr geochronology of the Nimrod group, central Transantarctic Mountains. In Adie, R. J. (Ed): Antarctic geology and geophysics, pp. 307–11. Universitetsforlaget, Oslo.Google Scholar
Jaffey, A. H., Flynn, K. F., Glendenin, L. E., Bentley, W. C. & Essling, A. M. 1971. Precision measurement of half-lives and specific activities of U235 and U238. Phys. Rev., C. 4, 1889–906.CrossRefGoogle Scholar
Krogh, T. E. 1973. A low-contamination method for hydrothermal decomposition of zircon and extraction of U and Pb for isotopic age determinations. Geochim. cosmochim. Acta 37, 485.CrossRefGoogle Scholar
Lindsay, J. F., Gunner, J. & Barrett, P. J. (1973). Reconnaissance geologic map of the Mount Elizabeth and Mount Kathleen quadrangles, Transantarctic Mountains, Antarctica. Antarctic Map U.S. geol. Surv. A-2.Google Scholar
McDougall, I. & Grindley, G. W. 1965. Potassium-argon dates on micas from the Nimrod-Beardmore-Axel Heiberg region. Ross Dependency, Antarctica. N.Z. Jl Geol. Geophys. 8, 304–13.CrossRefGoogle Scholar
Silver, L. T. 1963. The relation between radioactivity and discordance in zircons. In: Nuclear Science Rept. 38, pp. 34–9. Nat. Acad. Sci. Nat. Res. Council, Washington, D.C. (Publication 1075).Google Scholar
Tatsumoto, M. 1966. Isotopic composition of lead in volcanic rocks from Hawaii, Iwo Jima and Japan. J. geophys. Res. 71, 1721–33.CrossRefGoogle Scholar
York, D. 1966. Least squares fitting of a straight line. Can. J. Phys. 44, 1079–86.Google Scholar