Age and origin of granitic rocks in the Kalgoorlie-Norseman region of Western Australia - Implications for the origins of Archaean crust

Details Age and origin of granitic rocks in the Kalgoorlie-Norseman region of Western Australia - Implications for the origins of Archaean crust Age and origin of granitic rocks in the Kalgoorlie-Norseman region of Western Australia - Implications for the origins of Archaean crust

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989gecoa..53.1259h&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 53, June 1989, p. 1259-1275.

Physics

8

Earth Crust, Geochronology, Granite, Petrology, Rocks, Australia, Earth Mantle, Lead Isotopes, Planetary Evolution, Uranium Isotopes

Scientific paper

Zircon data obtained with the SHRIMP ion microprobe for three of the granite samples studied by Oversby (1975) are presented. These data provide direct evidence for an extended crustal prehistory for one granitic body which contains zircon cores that are 3100-3200 Ma old, which is up to 500 Ma older than the host granite. These data also make it possible to determine the crystallization ages for three plutons. The Pb isotope and zircon data can be used to develop a model for the evolution of southeastern Yilgarn crust.

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