In situ LA-ICPMS U-Pb dating of detrital zircons from the Cercadinho Formation, Minas Supergroup
In this paper, new geochronological data obtained for the detrital rocks of the Cercadinho Formation, basal unit of the Piracicaba Group, Minas Supergroup, are presented. U-Pb Laser Ablation Induced Coupled Mass Spectrometer (LA-ICPMS) analysis in detrital zircon from quartzite samples provided a...
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| Format: | Article |
| Language: | English |
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Universidade de São Paulo
2014-03-01
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| Series: | Geologia USP. Série Científica |
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| Online Access: | http://ppegeo.igc.usp.br/pdf/guspsc/v14n1/a04v14n1.pdf |
| _version_ | 1818271666669617152 |
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| author | Mônica de Cássia Oliveira Mendes Lydia Maria Lobato Victor Suckau Cristiano Lana |
| author_facet | Mônica de Cássia Oliveira Mendes Lydia Maria Lobato Victor Suckau Cristiano Lana |
| author_sort | Mônica de Cássia Oliveira Mendes |
| collection | DOAJ |
| description | In this paper, new geochronological data obtained for the detrital rocks of the Cercadinho Formation, basal unit of the Piracicaba
Group, Minas Supergroup, are presented. U-Pb Laser Ablation Induced Coupled Mass Spectrometer (LA-ICPMS) analysis in
detrital zircon from quartzite samples provided a new maximum depositional age for the Cercadinho Formation. The youngest
zircon population, among the dated samples, provided an average age of 2680±24 Ma. These rocks have an expressive contribution of Meso- to Neoarchean zircons, with ages between 2812±19 and 2909±19 Ma, and older populations between 3212±18 and 3272±
16 Ma, which occur mainly in the core of younger zircon grains. Comparing the U-Pb ages obtained in this work with previously published geochronological data for the basal units of the Minas Supergroup (Moeda Formation) an aging of the source for the detrital rocks of Cercadinho Formation can be observed, with a major contribution of zircons from TTG rocks crystallized between the Meso- and Neoarchean. |
| first_indexed | 2024-12-12T21:29:48Z |
| format | Article |
| id | doaj.art-a96de7381a704349b35b6aef2adbf974 |
| institution | Directory Open Access Journal |
| issn | 1519-874X 1519-874X |
| language | English |
| last_indexed | 2024-12-12T21:29:48Z |
| publishDate | 2014-03-01 |
| publisher | Universidade de São Paulo |
| record_format | Article |
| series | Geologia USP. Série Científica |
| spelling | doaj.art-a96de7381a704349b35b6aef2adbf9742022-12-22T00:11:21ZengUniversidade de São PauloGeologia USP. Série Científica1519-874X1519-874X2014-03-01141556810.5327/Z1519-874X201400010004In situ LA-ICPMS U-Pb dating of detrital zircons from the Cercadinho Formation, Minas SupergroupMônica de Cássia Oliveira Mendes0Lydia Maria Lobato1Victor Suckau2Cristiano Lana3Programa de Pós-graduação em Geologia, Instituto de Geociências, Universidade Federal de Minas Gerais - UFMG, Belo Horizonte, MG, BR Departamento de Geologia, Instituto de Geociências, Universidade Federal de Minas Gerais - UFMG, Belo Horizonte, MG, BRConsultant Geologist, Belo Horizonte, MG, BRDepartamento de Geologia, Escola de Minas, Universidade Federal de Ouro Preto - UFOP, Ouro Preto, MG, BRIn this paper, new geochronological data obtained for the detrital rocks of the Cercadinho Formation, basal unit of the Piracicaba Group, Minas Supergroup, are presented. U-Pb Laser Ablation Induced Coupled Mass Spectrometer (LA-ICPMS) analysis in detrital zircon from quartzite samples provided a new maximum depositional age for the Cercadinho Formation. The youngest zircon population, among the dated samples, provided an average age of 2680±24 Ma. These rocks have an expressive contribution of Meso- to Neoarchean zircons, with ages between 2812±19 and 2909±19 Ma, and older populations between 3212±18 and 3272± 16 Ma, which occur mainly in the core of younger zircon grains. Comparing the U-Pb ages obtained in this work with previously published geochronological data for the basal units of the Minas Supergroup (Moeda Formation) an aging of the source for the detrital rocks of Cercadinho Formation can be observed, with a major contribution of zircons from TTG rocks crystallized between the Meso- and Neoarchean.http://ppegeo.igc.usp.br/pdf/guspsc/v14n1/a04v14n1.pdfCercadinho FormationDetrital zircons populationsLaser Ablation Induced Coupled Mass SpectrometerU-Pb datingMaximum depositional age |
| spellingShingle | Mônica de Cássia Oliveira Mendes Lydia Maria Lobato Victor Suckau Cristiano Lana In situ LA-ICPMS U-Pb dating of detrital zircons from the Cercadinho Formation, Minas Supergroup Geologia USP. Série Científica Cercadinho Formation Detrital zircons populations Laser Ablation Induced Coupled Mass Spectrometer U-Pb dating Maximum depositional age |
| title | In situ LA-ICPMS U-Pb dating of detrital zircons from the Cercadinho Formation, Minas Supergroup |
| title_full | In situ LA-ICPMS U-Pb dating of detrital zircons from the Cercadinho Formation, Minas Supergroup |
| title_fullStr | In situ LA-ICPMS U-Pb dating of detrital zircons from the Cercadinho Formation, Minas Supergroup |
| title_full_unstemmed | In situ LA-ICPMS U-Pb dating of detrital zircons from the Cercadinho Formation, Minas Supergroup |
| title_short | In situ LA-ICPMS U-Pb dating of detrital zircons from the Cercadinho Formation, Minas Supergroup |
| title_sort | in situ la icpms u pb dating of detrital zircons from the cercadinho formation minas supergroup |
| topic | Cercadinho Formation Detrital zircons populations Laser Ablation Induced Coupled Mass Spectrometer U-Pb dating Maximum depositional age |
| url | http://ppegeo.igc.usp.br/pdf/guspsc/v14n1/a04v14n1.pdf |
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