Characterization of REE(+/-Ba)-bearing minerals from granitic rocks (Central Portugal) and metasomatic rocks (Bayan Obo, China)
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/48391 |
Resumo: | Detailed characterization of REE-bearing minerals in granitoid rocks from the Idanha-a-Nova and Castelo Branco plutons (Central Portugal) and in a few metasomatic rocks associated to the Bayan Obo Fe-REE-Nb mineralization (Inner Mongolia, China) provided an interesting basis for the interpretation of the bulk-rock REE patterns. Of the REE-bearing minerals analysed in the granitoid rocks, monazite exhibits the highest total REE contents and a LREE-enriched pattern which explains the bulk-rock LREE enrichment, and is quite distinct from the REE patterns obtained for zircon and xenotime, which probably occur in lower modal concentrations. In the Bayan Obo rocks, monazite and fluorcarbonates (bastnäsite and/or Nd-cebaite) are the main REE-bearing minerals, both exhibiting very high REE contents and pronounced LREE-enrichment quite matching that of the bulk-rocks, while REE contents in pyrochlore and in minerals of the hejtmanite-bafertisite group are much lower. |
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Characterization of REE(+/-Ba)-bearing minerals from granitic rocks (Central Portugal) and metasomatic rocks (Bayan Obo, China)REEMonaziteFluorcarbonatesZirconPyrochloreCiências Naturais::Ciências da Terra e do AmbienteDetailed characterization of REE-bearing minerals in granitoid rocks from the Idanha-a-Nova and Castelo Branco plutons (Central Portugal) and in a few metasomatic rocks associated to the Bayan Obo Fe-REE-Nb mineralization (Inner Mongolia, China) provided an interesting basis for the interpretation of the bulk-rock REE patterns. Of the REE-bearing minerals analysed in the granitoid rocks, monazite exhibits the highest total REE contents and a LREE-enriched pattern which explains the bulk-rock LREE enrichment, and is quite distinct from the REE patterns obtained for zircon and xenotime, which probably occur in lower modal concentrations. In the Bayan Obo rocks, monazite and fluorcarbonates (bastnäsite and/or Nd-cebaite) are the main REE-bearing minerals, both exhibiting very high REE contents and pronounced LREE-enrichment quite matching that of the bulk-rocks, while REE contents in pyrochlore and in minerals of the hejtmanite-bafertisite group are much lower.info:eu-repo/semantics/publishedVersionUniversidade do MinhoGrácio, N.Onken, C.Santos, R.Valongo, C.Antunes, Isabel Margarida Horta RibeiroCosta, Isabel Ribeiro da2017-102017-10-01T00:00:00Zconference paperinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/1822/48391eng978-84-697-5052-0info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-05-11T05:13:57Zoai:repositorium.sdum.uminho.pt:1822/48391Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-11T05:13:57Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Characterization of REE(+/-Ba)-bearing minerals from granitic rocks (Central Portugal) and metasomatic rocks (Bayan Obo, China) |
title |
Characterization of REE(+/-Ba)-bearing minerals from granitic rocks (Central Portugal) and metasomatic rocks (Bayan Obo, China) |
spellingShingle |
Characterization of REE(+/-Ba)-bearing minerals from granitic rocks (Central Portugal) and metasomatic rocks (Bayan Obo, China) Grácio, N. REE Monazite Fluorcarbonates Zircon Pyrochlore Ciências Naturais::Ciências da Terra e do Ambiente |
title_short |
Characterization of REE(+/-Ba)-bearing minerals from granitic rocks (Central Portugal) and metasomatic rocks (Bayan Obo, China) |
title_full |
Characterization of REE(+/-Ba)-bearing minerals from granitic rocks (Central Portugal) and metasomatic rocks (Bayan Obo, China) |
title_fullStr |
Characterization of REE(+/-Ba)-bearing minerals from granitic rocks (Central Portugal) and metasomatic rocks (Bayan Obo, China) |
title_full_unstemmed |
Characterization of REE(+/-Ba)-bearing minerals from granitic rocks (Central Portugal) and metasomatic rocks (Bayan Obo, China) |
title_sort |
Characterization of REE(+/-Ba)-bearing minerals from granitic rocks (Central Portugal) and metasomatic rocks (Bayan Obo, China) |
author |
Grácio, N. |
author_facet |
Grácio, N. Onken, C. Santos, R. Valongo, C. Antunes, Isabel Margarida Horta Ribeiro Costa, Isabel Ribeiro da |
author_role |
author |
author2 |
Onken, C. Santos, R. Valongo, C. Antunes, Isabel Margarida Horta Ribeiro Costa, Isabel Ribeiro da |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Grácio, N. Onken, C. Santos, R. Valongo, C. Antunes, Isabel Margarida Horta Ribeiro Costa, Isabel Ribeiro da |
dc.subject.por.fl_str_mv |
REE Monazite Fluorcarbonates Zircon Pyrochlore Ciências Naturais::Ciências da Terra e do Ambiente |
topic |
REE Monazite Fluorcarbonates Zircon Pyrochlore Ciências Naturais::Ciências da Terra e do Ambiente |
description |
Detailed characterization of REE-bearing minerals in granitoid rocks from the Idanha-a-Nova and Castelo Branco plutons (Central Portugal) and in a few metasomatic rocks associated to the Bayan Obo Fe-REE-Nb mineralization (Inner Mongolia, China) provided an interesting basis for the interpretation of the bulk-rock REE patterns. Of the REE-bearing minerals analysed in the granitoid rocks, monazite exhibits the highest total REE contents and a LREE-enriched pattern which explains the bulk-rock LREE enrichment, and is quite distinct from the REE patterns obtained for zircon and xenotime, which probably occur in lower modal concentrations. In the Bayan Obo rocks, monazite and fluorcarbonates (bastnäsite and/or Nd-cebaite) are the main REE-bearing minerals, both exhibiting very high REE contents and pronounced LREE-enrichment quite matching that of the bulk-rocks, while REE contents in pyrochlore and in minerals of the hejtmanite-bafertisite group are much lower. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-10 2017-10-01T00:00:00Z |
dc.type.driver.fl_str_mv |
conference paper |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/48391 |
url |
http://hdl.handle.net/1822/48391 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
978-84-697-5052-0 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
mluisa.alvim@gmail.com |
_version_ |
1817544556499959808 |