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claudia-bouman
Team TFS
Team TFS
1) Instituto de Geociências, Universidade de Brasília, Campus Darcy Ribeiro, 70910-900 Brasília, DF, Brasil, 2) Centro de Pesquisas Geocronológicas, Universidade de São Paulo, Rua do Lago, 562, 05508-080 São Paulo, SP, Brasil, 3) Research School of Earth Sciences, Australian National University, Building 47, Daley Road, Canberra, ACT 0200, Australia, 4) Curso de Pós-Graduação em Geociências, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Caixa Postal 15001, 91501-970 Porto Alegre, RS, Brasil
Anais da Academia Brasileira de Ciências (2015), V84(2), pp275-295, doi: 10.1590/S0001-37652012005000032
U-Pb zircon in situ dating with LA-MC-ICP-MS using a mixed detector configuration
Farid Chemale Jr (1), Koji Kawashita (2), Ivo A. Dussin (2), Janaína N. Ávila (3), Dayvisson Justino (4), Anelise BertottiI (4)
The LA-MC-ICP-MS method applied to U–Pb in situ dating is still rapidly evolving due to improvements in both lasers and ICP-MS. To test the validity and reproducibility of the method, 5 different zircon samples, including the standard Temora-2, ranging in age between 2.2 Ga and 246 Ma, were dated using both LA-MC-ICP-MS and SHRIMP. A careful cross-calibration using a diluted U-Th-Pb solution to calculate the Faraday reading to counting rate conversion factors and the highly suitable GJ-1 standard zircon for external calibrations were of paramount importance for obtaining reliable results.
  • MC-ICPMS
  • Neptune
  • U-Pb
  • Laser ablation
  • Multi Ion Counting
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