A magmatic age and four successive metamorphic events recorded in zircons from a single meta-anorthosite sample in the central zone of the Limpopo Belt, South Africa
Ion microprobe U-Th-Pb analyses combined with cathodoluminescence imaging of zircons from a meta-anorthosite from the Central Zone of the Limpopo Belt record five distinct events. The most concordant ages of cores of zircon yielded a weighted mean 207Pb/206Pb age of 3344±3.6 Ma, representing the pro...
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Published in | Journal of the Geological Society Vol. 166; no. 5; pp. 827 - 830 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
London, UK
Geological Society of London
01.09.2009
The Geological Society of London Geological Society Geological Society Publishing House |
Subjects | |
Online Access | Get full text |
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Summary: | Ion microprobe U-Th-Pb analyses combined with cathodoluminescence imaging of zircons from a meta-anorthosite from the Central Zone of the Limpopo Belt record five distinct events. The most concordant ages of cores of zircon yielded a weighted mean 207Pb/206Pb age of 3344±3.6 Ma, representing the protolith age. The unzoned overgrowths yielded four discrete groups with weighted mean 207Pb/206Pb ages of 3150±15 Ma, 2614±4 Ma, 2488±22 Ma and 2009±28 Ma, representing four possible metamorphic events in the Central Zone. This is the first time that a succession of several metamorphic events has been demonstrated in a single rock-type from the Limpopo Belt. |
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ISSN: | 0016-7649 2041-479X |
DOI: | 10.1144/0016-76492008-148 |