Carbonatites from the Southern Brazilian platform: I
We present a comprehensive overview of the geochemical characteristics and evolution of the carbonatites from the southern Brazilian Platform (Paraná Basin). The carbonatites from different complexes display large compositional variability in terms of abundances of incompatible and rare earth elemen...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2020-07-01
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| Series: | Open Geosciences |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/geo-2020-0050 |
| _version_ | 1818652924163653632 |
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| author | Speziale Sergio Castorina Francesca Censi Paolo Gomes Celso de Barros Marques Leila Soares Comin-Chiaramonti Piero |
| author_facet | Speziale Sergio Castorina Francesca Censi Paolo Gomes Celso de Barros Marques Leila Soares Comin-Chiaramonti Piero |
| author_sort | Speziale Sergio |
| collection | DOAJ |
| description | We present a comprehensive overview of the geochemical characteristics and evolution of the carbonatites from the southern Brazilian Platform (Paraná Basin). The carbonatites from different complexes display large compositional variability in terms of abundances of incompatible and rare earth elements. This is in agreement with an origin from heterogeneous lithospheric sources, as confirmed by isotopic data (see Speziale et al., this issue). The characteristic major and trace element abundances of these carbonatites present compelling evidence for invoking liquid unmixing as the main mechanism of their formation and evolution albeit few exceptions. We propose an evolutionary trend for the Brazilian carbonatites, which can be summarized as following: exsolution of the primary Ca- or Mg-carbonatitic liquids systematically takes place at the phonolite-peralkaline phonolite stage of magma differentiation; this is followed by progressive Fe-enrichment and by final emplacement of fluorocarbonatites associated with hydrothermal fluids. |
| first_indexed | 2024-12-17T02:29:44Z |
| format | Article |
| id | doaj.art-99e26333f7804ff4a9e51d5f66b62708 |
| institution | Directory Open Access Journal |
| issn | 2391-5447 |
| language | English |
| last_indexed | 2024-12-17T02:29:44Z |
| publishDate | 2020-07-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Geosciences |
| spelling | doaj.art-99e26333f7804ff4a9e51d5f66b627082022-12-21T22:07:00ZengDe GruyterOpen Geosciences2391-54472020-07-0112145247810.1515/geo-2020-0050geo-2020-0050Carbonatites from the Southern Brazilian platform: ISpeziale Sergio0Castorina Francesca1Censi Paolo2Gomes Celso de Barros3Marques Leila Soares4Comin-Chiaramonti Piero5Helmholz-Zentrum Potsdam Deutsches GFZ, Section 3.6, Chemistry and Physics of Earth Materials, 14473 Potsdam, GermanyGeosciences Department, Rome University, “La Sapienza”, 00185 Rome, ItalyEarth and Sea Science Department, Palermo University, 90123 Palermo, ItalyGeosciences Institute, Department of Mineralogy and Geotectonics, University of São Paulo, Cidade Universitária, São Paulo, SP 05508-900, BrasilInstituto de Astronomia, Geofísica e Ciências Atmosféricas, Department of Geophysics – Universidade de São Paulo, Cidade Universitária, São Paulo, SP 05508-900, BrasilDepartment of Mathematics and Geosciences, Trieste University, 34127 Trieste, ItalyWe present a comprehensive overview of the geochemical characteristics and evolution of the carbonatites from the southern Brazilian Platform (Paraná Basin). The carbonatites from different complexes display large compositional variability in terms of abundances of incompatible and rare earth elements. This is in agreement with an origin from heterogeneous lithospheric sources, as confirmed by isotopic data (see Speziale et al., this issue). The characteristic major and trace element abundances of these carbonatites present compelling evidence for invoking liquid unmixing as the main mechanism of their formation and evolution albeit few exceptions. We propose an evolutionary trend for the Brazilian carbonatites, which can be summarized as following: exsolution of the primary Ca- or Mg-carbonatitic liquids systematically takes place at the phonolite-peralkaline phonolite stage of magma differentiation; this is followed by progressive Fe-enrichment and by final emplacement of fluorocarbonatites associated with hydrothermal fluids.https://doi.org/10.1515/geo-2020-0050carbonatitesouthern brazilian platformlithospheric mantle sourcelithospheric mantle |
| spellingShingle | Speziale Sergio Castorina Francesca Censi Paolo Gomes Celso de Barros Marques Leila Soares Comin-Chiaramonti Piero Carbonatites from the Southern Brazilian platform: I Open Geosciences carbonatite southern brazilian platform lithospheric mantle source lithospheric mantle |
| title | Carbonatites from the Southern Brazilian platform: I |
| title_full | Carbonatites from the Southern Brazilian platform: I |
| title_fullStr | Carbonatites from the Southern Brazilian platform: I |
| title_full_unstemmed | Carbonatites from the Southern Brazilian platform: I |
| title_short | Carbonatites from the Southern Brazilian platform: I |
| title_sort | carbonatites from the southern brazilian platform i |
| topic | carbonatite southern brazilian platform lithospheric mantle source lithospheric mantle |
| url | https://doi.org/10.1515/geo-2020-0050 |
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