Lead isotopes in Archaean Plutonic rocks

Details Lead isotopes in Archaean Plutonic rocks Lead isotopes in Archaean Plutonic rocks

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978e%26psl..38..237o&link_type=abstract

Earth and Planetary Science Letters, Volume 38, Issue 1, p. 237-248.

Computer Science

2

Scientific paper

Archaean intrusive rocks have initial Pb isotopic compositions which show a varied and complex history for the source regions of the rocks. Even the oldest rocks from Greenland indicate heterogeneous U and Pb distribution prior to 3800 m.y. ago. Source regions with μ values less than 7 must have played a significant role in the early history of the earth. By late Archaean time U/Pb ratios of source regions had increased substantially. Data from Australia and North America show distinct regional differences, both within and between continents.

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