Evidences of ion-adsorption clay-type rey enrichment in a weathered crust of the sÃo francisco granite (SÃo paulo, Brazil)
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/222194 |
Resumo: | The rare earth elements and yttrium (REY) ion-adsorption clay deposits (IAC) are important in the global supply chain of these metals, and originated by the weathering of biotite and/or muscovite syenogranite carrying REY weatherable minerals, with enrichment of REY occurring by adsorpotion in neoformed clay minerals, mainly kaolinite and halloysite. Evidences of REY IAC enrichment is reported, for the first time, in the 6,1 to 7,8-m-thick weathering profile on the São Francisco Granite (SFG-southeastern Brazil), a late-tectonic metaluminous to peraluminous greisenized syenogranite. Petrography and SEM/EDS analysis indicates that the parent rock, a peraluminous syenogranite, hosts REY-(fluor)carbonate minerals originated by alteration process. X-ray diffraction of the weathering profile, with soil and saprolite horizons, indicates the presence of neoformed kaolinite and halloysite. Chemical analysis of the weathered profile indicates REY content modification along the weathering horizons. The enrichment factor presents REY loss in horizons with positive cerium anomalies and a high chemical index of alteration (CIA>90) (soils and the saprolite of the P1 weathering profile). Meanwhile, REY gain was observed in saprolite horizon with negative cerium anomalies and lower chemical alteration index (CIA<90 and >70) (saprolite of the P3 weathering profile). Mass balance calculation demonstrates the REY mobility and mass gain in the weathering profile in similar conditions to the Asian REY-IAC deposits. |
id |
UNSP_276b268a35b0e2b4fa9da0f511e4a11d |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/222194 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Evidences of ion-adsorption clay-type rey enrichment in a weathered crust of the sÃo francisco granite (SÃo paulo, Brazil)Evidências de enriquecimento de etr do tipo ion-adsorption clay no perfil de intemperismo do granito são francisco (São paulo, Brasil)Ion-exchangeableMass balanceNeoformed clay mineralsRare earth elementsWeathering enrichmentThe rare earth elements and yttrium (REY) ion-adsorption clay deposits (IAC) are important in the global supply chain of these metals, and originated by the weathering of biotite and/or muscovite syenogranite carrying REY weatherable minerals, with enrichment of REY occurring by adsorpotion in neoformed clay minerals, mainly kaolinite and halloysite. Evidences of REY IAC enrichment is reported, for the first time, in the 6,1 to 7,8-m-thick weathering profile on the São Francisco Granite (SFG-southeastern Brazil), a late-tectonic metaluminous to peraluminous greisenized syenogranite. Petrography and SEM/EDS analysis indicates that the parent rock, a peraluminous syenogranite, hosts REY-(fluor)carbonate minerals originated by alteration process. X-ray diffraction of the weathering profile, with soil and saprolite horizons, indicates the presence of neoformed kaolinite and halloysite. Chemical analysis of the weathered profile indicates REY content modification along the weathering horizons. The enrichment factor presents REY loss in horizons with positive cerium anomalies and a high chemical index of alteration (CIA>90) (soils and the saprolite of the P1 weathering profile). Meanwhile, REY gain was observed in saprolite horizon with negative cerium anomalies and lower chemical alteration index (CIA<90 and >70) (saprolite of the P3 weathering profile). Mass balance calculation demonstrates the REY mobility and mass gain in the weathering profile in similar conditions to the Asian REY-IAC deposits.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Universidade Federal de Uberlândia Instituto de Geografia, Km 1, Rodovia LMG-746Universidade Estadual Paulista-UNESP Instituto de Geociências e Ciências Exatas, Av. 24A, 1515, Bela VistaUniversidade Estadual Paulista-UNESP Instituto de Geociências e Ciências Exatas, Av. 24A, 1515, Bela VistaCNPq: 141449/2017-9Universidade Federal de Uberlândia (UFU)Universidade Estadual Paulista (UNESP)Faria Júnior, Ilio RodarteLuvizotto, George Luiz [UNESP]Rosolen, Vania Silvia [UNESP]2022-04-28T19:43:12Z2022-04-28T19:43:12Z2021-08-06info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article339-356Geociencias, v. 40, n. 2, p. 339-356, 2021.1980-900X0101-9082http://hdl.handle.net/11449/2221942-s2.0-85112428789Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporGeocienciasinfo:eu-repo/semantics/openAccess2022-04-28T19:43:12Zoai:repositorio.unesp.br:11449/222194Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:30:02.149254Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Evidences of ion-adsorption clay-type rey enrichment in a weathered crust of the sÃo francisco granite (SÃo paulo, Brazil) Evidências de enriquecimento de etr do tipo ion-adsorption clay no perfil de intemperismo do granito são francisco (São paulo, Brasil) |
title |
Evidences of ion-adsorption clay-type rey enrichment in a weathered crust of the sÃo francisco granite (SÃo paulo, Brazil) |
spellingShingle |
Evidences of ion-adsorption clay-type rey enrichment in a weathered crust of the sÃo francisco granite (SÃo paulo, Brazil) Faria Júnior, Ilio Rodarte Ion-exchangeable Mass balance Neoformed clay minerals Rare earth elements Weathering enrichment |
title_short |
Evidences of ion-adsorption clay-type rey enrichment in a weathered crust of the sÃo francisco granite (SÃo paulo, Brazil) |
title_full |
Evidences of ion-adsorption clay-type rey enrichment in a weathered crust of the sÃo francisco granite (SÃo paulo, Brazil) |
title_fullStr |
Evidences of ion-adsorption clay-type rey enrichment in a weathered crust of the sÃo francisco granite (SÃo paulo, Brazil) |
title_full_unstemmed |
Evidences of ion-adsorption clay-type rey enrichment in a weathered crust of the sÃo francisco granite (SÃo paulo, Brazil) |
title_sort |
Evidences of ion-adsorption clay-type rey enrichment in a weathered crust of the sÃo francisco granite (SÃo paulo, Brazil) |
author |
Faria Júnior, Ilio Rodarte |
author_facet |
Faria Júnior, Ilio Rodarte Luvizotto, George Luiz [UNESP] Rosolen, Vania Silvia [UNESP] |
author_role |
author |
author2 |
Luvizotto, George Luiz [UNESP] Rosolen, Vania Silvia [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de Uberlândia (UFU) Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Faria Júnior, Ilio Rodarte Luvizotto, George Luiz [UNESP] Rosolen, Vania Silvia [UNESP] |
dc.subject.por.fl_str_mv |
Ion-exchangeable Mass balance Neoformed clay minerals Rare earth elements Weathering enrichment |
topic |
Ion-exchangeable Mass balance Neoformed clay minerals Rare earth elements Weathering enrichment |
description |
The rare earth elements and yttrium (REY) ion-adsorption clay deposits (IAC) are important in the global supply chain of these metals, and originated by the weathering of biotite and/or muscovite syenogranite carrying REY weatherable minerals, with enrichment of REY occurring by adsorpotion in neoformed clay minerals, mainly kaolinite and halloysite. Evidences of REY IAC enrichment is reported, for the first time, in the 6,1 to 7,8-m-thick weathering profile on the São Francisco Granite (SFG-southeastern Brazil), a late-tectonic metaluminous to peraluminous greisenized syenogranite. Petrography and SEM/EDS analysis indicates that the parent rock, a peraluminous syenogranite, hosts REY-(fluor)carbonate minerals originated by alteration process. X-ray diffraction of the weathering profile, with soil and saprolite horizons, indicates the presence of neoformed kaolinite and halloysite. Chemical analysis of the weathered profile indicates REY content modification along the weathering horizons. The enrichment factor presents REY loss in horizons with positive cerium anomalies and a high chemical index of alteration (CIA>90) (soils and the saprolite of the P1 weathering profile). Meanwhile, REY gain was observed in saprolite horizon with negative cerium anomalies and lower chemical alteration index (CIA<90 and >70) (saprolite of the P3 weathering profile). Mass balance calculation demonstrates the REY mobility and mass gain in the weathering profile in similar conditions to the Asian REY-IAC deposits. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-08-06 2022-04-28T19:43:12Z 2022-04-28T19:43:12Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Geociencias, v. 40, n. 2, p. 339-356, 2021. 1980-900X 0101-9082 http://hdl.handle.net/11449/222194 2-s2.0-85112428789 |
identifier_str_mv |
Geociencias, v. 40, n. 2, p. 339-356, 2021. 1980-900X 0101-9082 2-s2.0-85112428789 |
url |
http://hdl.handle.net/11449/222194 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Geociencias |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
339-356 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129326611169280 |