BACKGROUND OF U AND Th IN SEDIMENTS OF BEDROCK RIVERS
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Environmental Smoke |
Texto Completo: | https://environmentalsmoke.com.br/index.php/EnvSmoke/article/view/178 |
Resumo: | The Miño River is a good example of bedrock rivers, where sediment geochemistry is scarcely studied. Its urban reach when passing through the city of Ourense gathers some characteristics that provide interest to its sediments, like scarcity of fine sediments accumulation and the impact of several human activities. Sediments trapped by potholes and other rock cavities were considered. In order to evaluate society-nature interactions through sediment composition it is critical to determine the compositional background (in absence of human alterations), particularly when working with trace elements. This work presents an exploratory assay to determine background in sediments from bedrock rivers by using two uncommon elements, uranium (U) and thorium (Th). To determine their background different statistical techniques were applied in order to set the background composition value and calculate possible enrichments. Background was calculated by simple least squares lineal regression by using Al as independent variable (reference element) resulting in 8.7 mgU kg-1 and 5.6 mgTh kg-1. Enrichments were found in some particular samples and can be attributed to intrinsic microenvironment complexities inside rock cavities. |
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Environmental Smoke |
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BACKGROUND OF U AND Th IN SEDIMENTS OF BEDROCK RIVERSBedrock riversBackground estimationActinoidsGeochemistryThe Miño River is a good example of bedrock rivers, where sediment geochemistry is scarcely studied. Its urban reach when passing through the city of Ourense gathers some characteristics that provide interest to its sediments, like scarcity of fine sediments accumulation and the impact of several human activities. Sediments trapped by potholes and other rock cavities were considered. In order to evaluate society-nature interactions through sediment composition it is critical to determine the compositional background (in absence of human alterations), particularly when working with trace elements. This work presents an exploratory assay to determine background in sediments from bedrock rivers by using two uncommon elements, uranium (U) and thorium (Th). To determine their background different statistical techniques were applied in order to set the background composition value and calculate possible enrichments. Background was calculated by simple least squares lineal regression by using Al as independent variable (reference element) resulting in 8.7 mgU kg-1 and 5.6 mgTh kg-1. Enrichments were found in some particular samples and can be attributed to intrinsic microenvironment complexities inside rock cavities.Environmental Smoke Institute2021-12-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdftext/htmlhttps://environmentalsmoke.com.br/index.php/EnvSmoke/article/view/17810.32435/envsmoke/xibesymp.3Environmental Smoke; No. Special Issue (2021): X Iberian Symposium on the Hydrographic Minho River Basin; 17-23Environmental Smoke; n. Special Issue (2021): X Simpósio Ibérico sobre a Bacia Hidrográfica do Rio Minho; 17-232595-5527reponame:Environmental Smokeinstname:Environmental Smokeinstacron:ESenghttps://environmentalsmoke.com.br/index.php/EnvSmoke/article/view/178/147https://environmentalsmoke.com.br/index.php/EnvSmoke/article/view/178/255Copyright (c) 2021 Miguel Ángel Álvarez-Vázquez, Elena de Uña-Álvarez, Ricardo Pregohttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessÁlvarez-Vázquez, Miguel Ángelde Uña-Álvarez, ElenaPrego, Ricardo2024-02-07T22:55:17Zoai:ojs.pkp.sfu.ca:article/178Revistahttps://environmentalsmoke.com.br/index.php/EnvSmokePRIhttps://environmentalsmoke.com.br/index.php/EnvSmoke/oaismoke@environmentalsmoke.com.br2595-55272595-5527opendoar:2024-02-07T22:55:17Environmental Smoke - Environmental Smokefalse |
dc.title.none.fl_str_mv |
BACKGROUND OF U AND Th IN SEDIMENTS OF BEDROCK RIVERS |
title |
BACKGROUND OF U AND Th IN SEDIMENTS OF BEDROCK RIVERS |
spellingShingle |
BACKGROUND OF U AND Th IN SEDIMENTS OF BEDROCK RIVERS Álvarez-Vázquez, Miguel Ángel Bedrock rivers Background estimation Actinoids Geochemistry |
title_short |
BACKGROUND OF U AND Th IN SEDIMENTS OF BEDROCK RIVERS |
title_full |
BACKGROUND OF U AND Th IN SEDIMENTS OF BEDROCK RIVERS |
title_fullStr |
BACKGROUND OF U AND Th IN SEDIMENTS OF BEDROCK RIVERS |
title_full_unstemmed |
BACKGROUND OF U AND Th IN SEDIMENTS OF BEDROCK RIVERS |
title_sort |
BACKGROUND OF U AND Th IN SEDIMENTS OF BEDROCK RIVERS |
author |
Álvarez-Vázquez, Miguel Ángel |
author_facet |
Álvarez-Vázquez, Miguel Ángel de Uña-Álvarez, Elena Prego, Ricardo |
author_role |
author |
author2 |
de Uña-Álvarez, Elena Prego, Ricardo |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Álvarez-Vázquez, Miguel Ángel de Uña-Álvarez, Elena Prego, Ricardo |
dc.subject.por.fl_str_mv |
Bedrock rivers Background estimation Actinoids Geochemistry |
topic |
Bedrock rivers Background estimation Actinoids Geochemistry |
description |
The Miño River is a good example of bedrock rivers, where sediment geochemistry is scarcely studied. Its urban reach when passing through the city of Ourense gathers some characteristics that provide interest to its sediments, like scarcity of fine sediments accumulation and the impact of several human activities. Sediments trapped by potholes and other rock cavities were considered. In order to evaluate society-nature interactions through sediment composition it is critical to determine the compositional background (in absence of human alterations), particularly when working with trace elements. This work presents an exploratory assay to determine background in sediments from bedrock rivers by using two uncommon elements, uranium (U) and thorium (Th). To determine their background different statistical techniques were applied in order to set the background composition value and calculate possible enrichments. Background was calculated by simple least squares lineal regression by using Al as independent variable (reference element) resulting in 8.7 mgU kg-1 and 5.6 mgTh kg-1. Enrichments were found in some particular samples and can be attributed to intrinsic microenvironment complexities inside rock cavities. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-12-31 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://environmentalsmoke.com.br/index.php/EnvSmoke/article/view/178 10.32435/envsmoke/xibesymp.3 |
url |
https://environmentalsmoke.com.br/index.php/EnvSmoke/article/view/178 |
identifier_str_mv |
10.32435/envsmoke/xibesymp.3 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://environmentalsmoke.com.br/index.php/EnvSmoke/article/view/178/147 https://environmentalsmoke.com.br/index.php/EnvSmoke/article/view/178/255 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2021 Miguel Ángel Álvarez-Vázquez, Elena de Uña-Álvarez, Ricardo Prego https://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2021 Miguel Ángel Álvarez-Vázquez, Elena de Uña-Álvarez, Ricardo Prego https://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf text/html |
dc.publisher.none.fl_str_mv |
Environmental Smoke Institute |
publisher.none.fl_str_mv |
Environmental Smoke Institute |
dc.source.none.fl_str_mv |
Environmental Smoke; No. Special Issue (2021): X Iberian Symposium on the Hydrographic Minho River Basin; 17-23 Environmental Smoke; n. Special Issue (2021): X Simpósio Ibérico sobre a Bacia Hidrográfica do Rio Minho; 17-23 2595-5527 reponame:Environmental Smoke instname:Environmental Smoke instacron:ES |
instname_str |
Environmental Smoke |
instacron_str |
ES |
institution |
ES |
reponame_str |
Environmental Smoke |
collection |
Environmental Smoke |
repository.name.fl_str_mv |
Environmental Smoke - Environmental Smoke |
repository.mail.fl_str_mv |
smoke@environmentalsmoke.com.br |
_version_ |
1797051134447190016 |