Authors / CoAuthors
Kositcin, N. | Clark, A. | Doublier, M.
Abstract
This Record presents new Sensitive High Resolution Ion Micro Probe (SHRIMP) in situ monazite U–Pb geochronological results from the East Tennant area that were obtained in March 2022 as part of Geoscience Australia’s (GA) Exploring for the Future (EFTF) program. Three samples were targeted for monazite geochronology in order to constrain the timing of metamorphism and ductile deformation in the East Tennant area. Monazites in cordierite schist from the Alroy Formation in drill hole NDIBK01 (NDIBK01.300) yielded a weighted mean 207Pb/206Pb age of 1843.6 ± 6.1 Ma (95% confidence). Paragneiss from the Alroy Formation in drill hole NDIBK10 (NDIBK10.009) yielded monazites that returned a weighted mean 207Pb/206Pb crystallisation age of 1843.5 ± 5.1 Ma. Sparse monazites in sample NDIBK04.300, a garnet phyllite from drill hole NDIBK04, yielded a weighted mean 207Pb/206Pb crystallisation age of 1831 ± 28 Ma. These ages, from samples distributed throughout the East Tennant area, are interpreted to constrain the timing of an episode of low pressure, medium-grade metamorphism and coeval deformation.
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document
eCat Id
146660
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
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- theme.ANZRC Fields of Research.rdf
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- EARTH SCIENCESAPPLIED MATHEMATICS
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- EFTF
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- Barkly-Isa-Georgetown
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- Exploring for the Future
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- Published_External
Publication Date
2022-06-22T23:47:18
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completed
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GA Record
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geoscientificInformation
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Record RECORD: 2022/018
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[-44.00, -9.00, 112.00, 154.00]
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