Water/rock interactions, chemical weathering and erosion, and supergene enrichment in the Tapira and Catalão I alkaline‑carbonatite complexes, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.gexplo.2022.106999 http://hdl.handle.net/11449/239859 |
Resumo: | Alkaline‑carbonatite complexes from the Alto Parnaíba Igneous Province (APIP) host important supergene concentrations of Nb, REE, P, and Ti. To quantify water/rock interaction and the interplay of chemical weathering and erosion that results in supergene enrichment, the chemistry of solutions draining the Tapira and Catalão I complexes were studied and the transfer of elements within and out of the weathering profiles quantified. Ca2+ and HCO3− are the main ions in surface water samples draining both watersheds, with an average annual flux of 49 t/km2/a of dissolved load. Total dissolved loads are highest during the summer (wet) months. The annual fluxes of Cl−, PO43− and NO3− yield negative values, suggesting significant input of these species from rainwater. The fluvial transport of dissolved elements due to silicate weathering, carbonate dissolution and rainfall input is ~26, 3 and 19 t/km2/a at Tapira and 29, 3 and 18 t/km2/a at Catalão I. Chemical weathering rates of alkaline rocks are ~4 m/Ma at Tapira and ~5 m/Ma at Catalão I. Constitutive mass balance suggests an eroded rock column of 84 m at Tapira and 39 m at Catalão I, with long-term erosion rates of 1.3 and 0.9 m/Ma, respectively. In contrast, long-term weathering rates were 3.0 m/Ma at Tapira and 2.4 m/Ma at Catalão I. Internal collapse of saprolites due to mass loss creates internal basins with an overburden of soils, locally transported material and lake sediments. Carbonate congruent dissolution, silicate incongruent dissolution and hydrolysis, and phosphate and oxide (pyrochlore) dissolution-reprecipitation are the main water/rock interactions in the Tapira and Catalão I alkaline‑carbonatite complexes that promote the enrichment of primary and secondary minerals and produce supergene P, Ti, Nb and REE deposits in the isalteritic saprolites; Ti is residually enriched in the alloteritic saprolite at Tapira. |
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Water/rock interactions, chemical weathering and erosion, and supergene enrichment in the Tapira and Catalão I alkaline‑carbonatite complexes, BrazilAlkaline igneous provincesChemical erosionFluvial transportResidual concentrationSupergene depositsAlkaline‑carbonatite complexes from the Alto Parnaíba Igneous Province (APIP) host important supergene concentrations of Nb, REE, P, and Ti. To quantify water/rock interaction and the interplay of chemical weathering and erosion that results in supergene enrichment, the chemistry of solutions draining the Tapira and Catalão I complexes were studied and the transfer of elements within and out of the weathering profiles quantified. Ca2+ and HCO3− are the main ions in surface water samples draining both watersheds, with an average annual flux of 49 t/km2/a of dissolved load. Total dissolved loads are highest during the summer (wet) months. The annual fluxes of Cl−, PO43− and NO3− yield negative values, suggesting significant input of these species from rainwater. The fluvial transport of dissolved elements due to silicate weathering, carbonate dissolution and rainfall input is ~26, 3 and 19 t/km2/a at Tapira and 29, 3 and 18 t/km2/a at Catalão I. Chemical weathering rates of alkaline rocks are ~4 m/Ma at Tapira and ~5 m/Ma at Catalão I. Constitutive mass balance suggests an eroded rock column of 84 m at Tapira and 39 m at Catalão I, with long-term erosion rates of 1.3 and 0.9 m/Ma, respectively. In contrast, long-term weathering rates were 3.0 m/Ma at Tapira and 2.4 m/Ma at Catalão I. Internal collapse of saprolites due to mass loss creates internal basins with an overburden of soils, locally transported material and lake sediments. Carbonate congruent dissolution, silicate incongruent dissolution and hydrolysis, and phosphate and oxide (pyrochlore) dissolution-reprecipitation are the main water/rock interactions in the Tapira and Catalão I alkaline‑carbonatite complexes that promote the enrichment of primary and secondary minerals and produce supergene P, Ti, Nb and REE deposits in the isalteritic saprolites; Ti is residually enriched in the alloteritic saprolite at Tapira.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNESP - Universidade Estadual Paulista Instituto de Geociências e Ciências Exatas, São PauloUQ - University of Queensland School of Earth ScienceUNIFAL – Universidade Federal de Alfenas Instituto de Ciências e Tecnologia, Minas GeraisUNESP - Universidade Estadual Paulista Instituto de Geociências e Ciências Exatas, São PauloFAPESP: 2005/59203-1CNPq: 200775/2008-1FAPESP: 2017/23577-2Universidade Estadual Paulista (UNESP)School of Earth ScienceInstituto de Ciências e TecnologiaConceição, Fabiano T. da[UNESP]Vasconcelos, Paulo M.Godoy, Letícia H. [UNESP]Navarro, Guillermo R.B. [UNESP]Montibeller, Cibele C. [UNESP]Sardinha, Diego S.2023-03-01T19:50:40Z2023-03-01T19:50:40Z2022-06-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.gexplo.2022.106999Journal of Geochemical Exploration, v. 237.0375-6742http://hdl.handle.net/11449/23985910.1016/j.gexplo.2022.1069992-s2.0-85127960682Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Geochemical Explorationinfo:eu-repo/semantics/openAccess2023-03-01T19:50:40Zoai:repositorio.unesp.br:11449/239859Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-03-01T19:50:40Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Water/rock interactions, chemical weathering and erosion, and supergene enrichment in the Tapira and Catalão I alkaline‑carbonatite complexes, Brazil |
title |
Water/rock interactions, chemical weathering and erosion, and supergene enrichment in the Tapira and Catalão I alkaline‑carbonatite complexes, Brazil |
spellingShingle |
Water/rock interactions, chemical weathering and erosion, and supergene enrichment in the Tapira and Catalão I alkaline‑carbonatite complexes, Brazil Conceição, Fabiano T. da[UNESP] Alkaline igneous provinces Chemical erosion Fluvial transport Residual concentration Supergene deposits |
title_short |
Water/rock interactions, chemical weathering and erosion, and supergene enrichment in the Tapira and Catalão I alkaline‑carbonatite complexes, Brazil |
title_full |
Water/rock interactions, chemical weathering and erosion, and supergene enrichment in the Tapira and Catalão I alkaline‑carbonatite complexes, Brazil |
title_fullStr |
Water/rock interactions, chemical weathering and erosion, and supergene enrichment in the Tapira and Catalão I alkaline‑carbonatite complexes, Brazil |
title_full_unstemmed |
Water/rock interactions, chemical weathering and erosion, and supergene enrichment in the Tapira and Catalão I alkaline‑carbonatite complexes, Brazil |
title_sort |
Water/rock interactions, chemical weathering and erosion, and supergene enrichment in the Tapira and Catalão I alkaline‑carbonatite complexes, Brazil |
author |
Conceição, Fabiano T. da[UNESP] |
author_facet |
Conceição, Fabiano T. da[UNESP] Vasconcelos, Paulo M. Godoy, Letícia H. [UNESP] Navarro, Guillermo R.B. [UNESP] Montibeller, Cibele C. [UNESP] Sardinha, Diego S. |
author_role |
author |
author2 |
Vasconcelos, Paulo M. Godoy, Letícia H. [UNESP] Navarro, Guillermo R.B. [UNESP] Montibeller, Cibele C. [UNESP] Sardinha, Diego S. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) School of Earth Science Instituto de Ciências e Tecnologia |
dc.contributor.author.fl_str_mv |
Conceição, Fabiano T. da[UNESP] Vasconcelos, Paulo M. Godoy, Letícia H. [UNESP] Navarro, Guillermo R.B. [UNESP] Montibeller, Cibele C. [UNESP] Sardinha, Diego S. |
dc.subject.por.fl_str_mv |
Alkaline igneous provinces Chemical erosion Fluvial transport Residual concentration Supergene deposits |
topic |
Alkaline igneous provinces Chemical erosion Fluvial transport Residual concentration Supergene deposits |
description |
Alkaline‑carbonatite complexes from the Alto Parnaíba Igneous Province (APIP) host important supergene concentrations of Nb, REE, P, and Ti. To quantify water/rock interaction and the interplay of chemical weathering and erosion that results in supergene enrichment, the chemistry of solutions draining the Tapira and Catalão I complexes were studied and the transfer of elements within and out of the weathering profiles quantified. Ca2+ and HCO3− are the main ions in surface water samples draining both watersheds, with an average annual flux of 49 t/km2/a of dissolved load. Total dissolved loads are highest during the summer (wet) months. The annual fluxes of Cl−, PO43− and NO3− yield negative values, suggesting significant input of these species from rainwater. The fluvial transport of dissolved elements due to silicate weathering, carbonate dissolution and rainfall input is ~26, 3 and 19 t/km2/a at Tapira and 29, 3 and 18 t/km2/a at Catalão I. Chemical weathering rates of alkaline rocks are ~4 m/Ma at Tapira and ~5 m/Ma at Catalão I. Constitutive mass balance suggests an eroded rock column of 84 m at Tapira and 39 m at Catalão I, with long-term erosion rates of 1.3 and 0.9 m/Ma, respectively. In contrast, long-term weathering rates were 3.0 m/Ma at Tapira and 2.4 m/Ma at Catalão I. Internal collapse of saprolites due to mass loss creates internal basins with an overburden of soils, locally transported material and lake sediments. Carbonate congruent dissolution, silicate incongruent dissolution and hydrolysis, and phosphate and oxide (pyrochlore) dissolution-reprecipitation are the main water/rock interactions in the Tapira and Catalão I alkaline‑carbonatite complexes that promote the enrichment of primary and secondary minerals and produce supergene P, Ti, Nb and REE deposits in the isalteritic saprolites; Ti is residually enriched in the alloteritic saprolite at Tapira. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-06-01 2023-03-01T19:50:40Z 2023-03-01T19:50:40Z |
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 |
http://dx.doi.org/10.1016/j.gexplo.2022.106999 Journal of Geochemical Exploration, v. 237. 0375-6742 http://hdl.handle.net/11449/239859 10.1016/j.gexplo.2022.106999 2-s2.0-85127960682 |
url |
http://dx.doi.org/10.1016/j.gexplo.2022.106999 http://hdl.handle.net/11449/239859 |
identifier_str_mv |
Journal of Geochemical Exploration, v. 237. 0375-6742 10.1016/j.gexplo.2022.106999 2-s2.0-85127960682 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Geochemical Exploration |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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 |
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1803650325346779136 |