The constant flux and constant sedimentation (CF:CS) 210Pb chronological method applied to determine sedimentation rates at Amazon River watershed, Brazil
Autor(a) principal: | |
---|---|
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.jsames.2022.103715 http://hdl.handle.net/11449/234007 |
Resumo: | Activity profiles of excess 210Pb determined in three sediment cores from Amazon River mouth, Amapá State, Brazil, provide the evaluation of sedimentation rates, contributing to a better knowledge of the hydrological conditions. Chemical data on the sediments allowed calculation of the Geoaccumulation Index (Igeo) for each constituent analyzed. Significant direct relationships among Fe2O3 and major/minor constituents Al2O3 (r = 0.86), K2O (r = 0.94), MgO (r = 0.89), MnO (r = 0.92), BaO (r = 0.64), P2O5 (r = 0.62), and TiO2 (r = 0.54), inverse correlation between Fe2O3 and SiO2 (r = −0.93) and the direct correlation between SiO2 and LOI (loss on ignition) (r = 0.88) suggest competitive sorption of Si to Fe oxides and organic compounds. Igeo values between −3.75 and 0.22 for Si, Al, Na, K, Ca, Mg, Fe, Mn, Ti, P, S, Sr, Ba, Rb, Zn, Cr, Nb, Cu, Ni, As, V, Ga, Tb, Y, and Ce indicate practically unpolluted environments despite several mining activities in the Amazon basin and its vicinity. The apparent sediment mass accumulation rates between 0.5 and 2.4 gcm−2yr−1 are compatible with the results of others studies. The 210Pb activity at one sampling point (P1) exhibited an abrupt fluctuation, similar to findings from previous studies held at the northern channel of the Amazon River discharge. On the other hand, in two sediment profiles (P2 and P3), the excess 210Pb activity data validate the use of the CF:CS method, yielding unique straight lines and increasing the sedimentation rates database. |
id |
UNSP_5c072e6cbd9e12e83b4bf2cae191a5ee |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/234007 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
The constant flux and constant sedimentation (CF:CS) 210Pb chronological method applied to determine sedimentation rates at Amazon River watershed, Brazil210Pb-chronological methodAmazon river watershedGeoaccumulation indexPhysical weatheringSedimentation ratesActivity profiles of excess 210Pb determined in three sediment cores from Amazon River mouth, Amapá State, Brazil, provide the evaluation of sedimentation rates, contributing to a better knowledge of the hydrological conditions. Chemical data on the sediments allowed calculation of the Geoaccumulation Index (Igeo) for each constituent analyzed. Significant direct relationships among Fe2O3 and major/minor constituents Al2O3 (r = 0.86), K2O (r = 0.94), MgO (r = 0.89), MnO (r = 0.92), BaO (r = 0.64), P2O5 (r = 0.62), and TiO2 (r = 0.54), inverse correlation between Fe2O3 and SiO2 (r = −0.93) and the direct correlation between SiO2 and LOI (loss on ignition) (r = 0.88) suggest competitive sorption of Si to Fe oxides and organic compounds. Igeo values between −3.75 and 0.22 for Si, Al, Na, K, Ca, Mg, Fe, Mn, Ti, P, S, Sr, Ba, Rb, Zn, Cr, Nb, Cu, Ni, As, V, Ga, Tb, Y, and Ce indicate practically unpolluted environments despite several mining activities in the Amazon basin and its vicinity. The apparent sediment mass accumulation rates between 0.5 and 2.4 gcm−2yr−1 are compatible with the results of others studies. The 210Pb activity at one sampling point (P1) exhibited an abrupt fluctuation, similar to findings from previous studies held at the northern channel of the Amazon River discharge. On the other hand, in two sediment profiles (P2 and P3), the excess 210Pb activity data validate the use of the CF:CS method, yielding unique straight lines and increasing the sedimentation rates database.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Universidade Federal do Amapá (UNIFAP) Campus Marco Zero, Rodovia Juscelino Kubitschek, km 2Instituto de Geociências e Ciências Exatas UNESP, Av. 24A, No. 1515Instituto de Geociências e Ciências Exatas UNESP, Av. 24A, No. 1515CNPq: 485607/2013-1Universidade Federal do Amapá (UNIFAP)Universidade Estadual Paulista (UNESP)Cardoso Nery, José ReinaldoBonotto, Daniel Marcos [UNESP]2022-05-01T12:09:44Z2022-05-01T12:09:44Z2022-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.jsames.2022.103715Journal of South American Earth Sciences, v. 114.0895-9811http://hdl.handle.net/11449/23400710.1016/j.jsames.2022.1037152-s2.0-85122789566Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of South American Earth Sciencesinfo:eu-repo/semantics/openAccess2022-05-01T12:09:44Zoai:repositorio.unesp.br:11449/234007Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:02:16.336792Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
The constant flux and constant sedimentation (CF:CS) 210Pb chronological method applied to determine sedimentation rates at Amazon River watershed, Brazil |
title |
The constant flux and constant sedimentation (CF:CS) 210Pb chronological method applied to determine sedimentation rates at Amazon River watershed, Brazil |
spellingShingle |
The constant flux and constant sedimentation (CF:CS) 210Pb chronological method applied to determine sedimentation rates at Amazon River watershed, Brazil Cardoso Nery, José Reinaldo 210Pb-chronological method Amazon river watershed Geoaccumulation index Physical weathering Sedimentation rates |
title_short |
The constant flux and constant sedimentation (CF:CS) 210Pb chronological method applied to determine sedimentation rates at Amazon River watershed, Brazil |
title_full |
The constant flux and constant sedimentation (CF:CS) 210Pb chronological method applied to determine sedimentation rates at Amazon River watershed, Brazil |
title_fullStr |
The constant flux and constant sedimentation (CF:CS) 210Pb chronological method applied to determine sedimentation rates at Amazon River watershed, Brazil |
title_full_unstemmed |
The constant flux and constant sedimentation (CF:CS) 210Pb chronological method applied to determine sedimentation rates at Amazon River watershed, Brazil |
title_sort |
The constant flux and constant sedimentation (CF:CS) 210Pb chronological method applied to determine sedimentation rates at Amazon River watershed, Brazil |
author |
Cardoso Nery, José Reinaldo |
author_facet |
Cardoso Nery, José Reinaldo Bonotto, Daniel Marcos [UNESP] |
author_role |
author |
author2 |
Bonotto, Daniel Marcos [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Federal do Amapá (UNIFAP) Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Cardoso Nery, José Reinaldo Bonotto, Daniel Marcos [UNESP] |
dc.subject.por.fl_str_mv |
210Pb-chronological method Amazon river watershed Geoaccumulation index Physical weathering Sedimentation rates |
topic |
210Pb-chronological method Amazon river watershed Geoaccumulation index Physical weathering Sedimentation rates |
description |
Activity profiles of excess 210Pb determined in three sediment cores from Amazon River mouth, Amapá State, Brazil, provide the evaluation of sedimentation rates, contributing to a better knowledge of the hydrological conditions. Chemical data on the sediments allowed calculation of the Geoaccumulation Index (Igeo) for each constituent analyzed. Significant direct relationships among Fe2O3 and major/minor constituents Al2O3 (r = 0.86), K2O (r = 0.94), MgO (r = 0.89), MnO (r = 0.92), BaO (r = 0.64), P2O5 (r = 0.62), and TiO2 (r = 0.54), inverse correlation between Fe2O3 and SiO2 (r = −0.93) and the direct correlation between SiO2 and LOI (loss on ignition) (r = 0.88) suggest competitive sorption of Si to Fe oxides and organic compounds. Igeo values between −3.75 and 0.22 for Si, Al, Na, K, Ca, Mg, Fe, Mn, Ti, P, S, Sr, Ba, Rb, Zn, Cr, Nb, Cu, Ni, As, V, Ga, Tb, Y, and Ce indicate practically unpolluted environments despite several mining activities in the Amazon basin and its vicinity. The apparent sediment mass accumulation rates between 0.5 and 2.4 gcm−2yr−1 are compatible with the results of others studies. The 210Pb activity at one sampling point (P1) exhibited an abrupt fluctuation, similar to findings from previous studies held at the northern channel of the Amazon River discharge. On the other hand, in two sediment profiles (P2 and P3), the excess 210Pb activity data validate the use of the CF:CS method, yielding unique straight lines and increasing the sedimentation rates database. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-05-01T12:09:44Z 2022-05-01T12:09:44Z 2022-03-01 |
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.jsames.2022.103715 Journal of South American Earth Sciences, v. 114. 0895-9811 http://hdl.handle.net/11449/234007 10.1016/j.jsames.2022.103715 2-s2.0-85122789566 |
url |
http://dx.doi.org/10.1016/j.jsames.2022.103715 http://hdl.handle.net/11449/234007 |
identifier_str_mv |
Journal of South American Earth Sciences, v. 114. 0895-9811 10.1016/j.jsames.2022.103715 2-s2.0-85122789566 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of South American Earth Sciences |
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 |
|
_version_ |
1808128743687847936 |