Archean Rocks in Antarctica: 2.5-Billion-Year Uranium-Lead Ages of Pegmatites in Enderby Land

Details Archean Rocks in Antarctica: 2.5-Billion-Year Uranium-Lead Ages of Pegmatites in Enderby Land Archean Rocks in Antarctica: 2.5-Billion-Year Uranium-Lead Ages of Pegmatites in Enderby Land

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979sci...206..443g&link_type=abstract

Science, Volume 206, Issue 4417, pp. 443-445

Computer Science

6

Scientific paper

Uranium-lead isotopic data indicate that the granulite-facies Napier complex of Enderby Land, Antarctica, was cut by charnockitic pegmatites 2.5 billion years ago and by pegmatites lacking hypersthene 0.52 billion years ago. The 4-billion-year lead-lead ages (whole rock) reported for the Napier complex are rejected since these leads developed in three stages. Reconstructions of Gondwanaland suggest that the Napier complex may be a continuation of the Archean granulitic terrain of southern India.

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