Process mineralogy of rare earths from deeply weathered alkali-carbonatite deposits in Brazil
Brazil has the second largest rare earths mineral (REM) resource in the world, mainly associated with the weathered portion of carbonatite complexes. This paper reports process mineralogy studies performed for 10 samples collected from the deeply weathered portion of different relevant Brazilian dep...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-07-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785420313983 |
| _version_ | 1818389990884769792 |
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| author | Juliana Lívi Antoniassi Daniel Uliana Renato Contessotto Henrique Kahn Carina Ulsen |
| author_facet | Juliana Lívi Antoniassi Daniel Uliana Renato Contessotto Henrique Kahn Carina Ulsen |
| author_sort | Juliana Lívi Antoniassi |
| collection | DOAJ |
| description | Brazil has the second largest rare earths mineral (REM) resource in the world, mainly associated with the weathered portion of carbonatite complexes. This paper reports process mineralogy studies performed for 10 samples collected from the deeply weathered portion of different relevant Brazilian deposits, having a soil appearance and varied grain sizes with a significant content of natural fines (below 20 μm). The results indicate that REM are mainly composed of light rare earth elements and present a fine-grained nature and intricate associations with gangue minerals. Monazite is by far the most relevant REM; cerianite and bastnaesite are typical of only one of the studied deposits. The complexity of the occurrence of the rare earths challenges the development of mineral processing routes. A scandium phosphate mineral identified as a trace in one of the studied deposits has not yet been reported in the Brazilian alkaline complexes. |
| first_indexed | 2024-12-14T04:50:31Z |
| format | Article |
| id | doaj.art-90d76a2edfe948bfa079bf2f0ad428b0 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-14T04:50:31Z |
| publishDate | 2020-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-90d76a2edfe948bfa079bf2f0ad428b02022-12-21T23:16:34ZengElsevierJournal of Materials Research and Technology2238-78542020-07-019488428853Process mineralogy of rare earths from deeply weathered alkali-carbonatite deposits in BrazilJuliana Lívi Antoniassi0Daniel Uliana1Renato Contessotto2Henrique Kahn3Carina Ulsen4Corresponding author.; Universidade de São Paulo, Mining and Petroleum Engineering Department, Technological Characterization Laboratory (LCT-USP), Av. Prof. Mello Moraes, 2373, 05508-030 Sao Paulo, SP, BrazilUniversidade de São Paulo, Mining and Petroleum Engineering Department, Technological Characterization Laboratory (LCT-USP), Av. Prof. Mello Moraes, 2373, 05508-030 Sao Paulo, SP, BrazilUniversidade de São Paulo, Mining and Petroleum Engineering Department, Technological Characterization Laboratory (LCT-USP), Av. Prof. Mello Moraes, 2373, 05508-030 Sao Paulo, SP, BrazilUniversidade de São Paulo, Mining and Petroleum Engineering Department, Technological Characterization Laboratory (LCT-USP), Av. Prof. Mello Moraes, 2373, 05508-030 Sao Paulo, SP, BrazilUniversidade de São Paulo, Mining and Petroleum Engineering Department, Technological Characterization Laboratory (LCT-USP), Av. Prof. Mello Moraes, 2373, 05508-030 Sao Paulo, SP, BrazilBrazil has the second largest rare earths mineral (REM) resource in the world, mainly associated with the weathered portion of carbonatite complexes. This paper reports process mineralogy studies performed for 10 samples collected from the deeply weathered portion of different relevant Brazilian deposits, having a soil appearance and varied grain sizes with a significant content of natural fines (below 20 μm). The results indicate that REM are mainly composed of light rare earth elements and present a fine-grained nature and intricate associations with gangue minerals. Monazite is by far the most relevant REM; cerianite and bastnaesite are typical of only one of the studied deposits. The complexity of the occurrence of the rare earths challenges the development of mineral processing routes. A scandium phosphate mineral identified as a trace in one of the studied deposits has not yet been reported in the Brazilian alkaline complexes.http://www.sciencedirect.com/science/article/pii/S2238785420313983Rare earth elementsMonaziteBastnaesiteBrazilian depositsProcess mineralogy |
| spellingShingle | Juliana Lívi Antoniassi Daniel Uliana Renato Contessotto Henrique Kahn Carina Ulsen Process mineralogy of rare earths from deeply weathered alkali-carbonatite deposits in Brazil Journal of Materials Research and Technology Rare earth elements Monazite Bastnaesite Brazilian deposits Process mineralogy |
| title | Process mineralogy of rare earths from deeply weathered alkali-carbonatite deposits in Brazil |
| title_full | Process mineralogy of rare earths from deeply weathered alkali-carbonatite deposits in Brazil |
| title_fullStr | Process mineralogy of rare earths from deeply weathered alkali-carbonatite deposits in Brazil |
| title_full_unstemmed | Process mineralogy of rare earths from deeply weathered alkali-carbonatite deposits in Brazil |
| title_short | Process mineralogy of rare earths from deeply weathered alkali-carbonatite deposits in Brazil |
| title_sort | process mineralogy of rare earths from deeply weathered alkali carbonatite deposits in brazil |
| topic | Rare earth elements Monazite Bastnaesite Brazilian deposits Process mineralogy |
| url | http://www.sciencedirect.com/science/article/pii/S2238785420313983 |
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