Pathway Weathering in Granitoid Rocks from Central Region of Angola: Geochemical and Mineralogical Data
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/8094 |
Resumo: | The Central Region of Angola is characterized by the abundance of granitoid rocks, whose weathering “in situ” originated the so-called residual soils. The textural, geochemical and mineralogical properties of these soils depend not only on the chemical composition of parent rock, but mainly on the local climatic and geomorphological characteristics. In the study area, sampling sites were selected, which extend from the region of Kwanza- Norte (Kassenda, Dondo) through Kwanza-Sul (Cangulo, Quibala and Waco Kungo) until the plateau of Huambo, where samples of fresh rock, weathered rock and its residual soil were collected along each weathering profile. Chemical analytical data were determined using X-ray fluorescence (XRF) analysis of the major and minor elements, whereas mineralogical data were determined using X-ray diffraction (XRD), on the samples of rock and on the respective residual soil. The results obtained and their comparative analysis between the sampling sites, as well as along each weathering profile is presented. This paper allows contributing to the knowledge of the geochemical weathering in tropical areas, as is the case of Angola. |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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7160 |
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Pathway Weathering in Granitoid Rocks from Central Region of Angola: Geochemical and Mineralogical Datagranitoidsweatheringresidual soilsgeochemistrymineralogyThe Central Region of Angola is characterized by the abundance of granitoid rocks, whose weathering “in situ” originated the so-called residual soils. The textural, geochemical and mineralogical properties of these soils depend not only on the chemical composition of parent rock, but mainly on the local climatic and geomorphological characteristics. In the study area, sampling sites were selected, which extend from the region of Kwanza- Norte (Kassenda, Dondo) through Kwanza-Sul (Cangulo, Quibala and Waco Kungo) until the plateau of Huambo, where samples of fresh rock, weathered rock and its residual soil were collected along each weathering profile. Chemical analytical data were determined using X-ray fluorescence (XRF) analysis of the major and minor elements, whereas mineralogical data were determined using X-ray diffraction (XRD), on the samples of rock and on the respective residual soil. The results obtained and their comparative analysis between the sampling sites, as well as along each weathering profile is presented. This paper allows contributing to the knowledge of the geochemical weathering in tropical areas, as is the case of Angola.EDUAN2013-01-30T16:57:34Z2013-01-302012-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/8094http://hdl.handle.net/10174/8094eng282219-8024Angolan Journal of Scienceiduarte@uevora.ptjmirao@uevora.pttavares.rocha@ua.ptfernandobonito@gmail.comfelqueta@yahoo.com.brnair.f.falcao@hotmail.com247Duarte, Isabel M. R.Mirão, José A. P.Rocha, Fernando J. T.Bonito, Fernando A. B.Queta, Felisberto M.Falcão, Winnieinfo: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:RCAAP2024-01-03T18:48:35Zoai:dspace.uevora.pt:10174/8094Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:02:22.015484Repositório 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 |
Pathway Weathering in Granitoid Rocks from Central Region of Angola: Geochemical and Mineralogical Data |
title |
Pathway Weathering in Granitoid Rocks from Central Region of Angola: Geochemical and Mineralogical Data |
spellingShingle |
Pathway Weathering in Granitoid Rocks from Central Region of Angola: Geochemical and Mineralogical Data Duarte, Isabel M. R. granitoids weathering residual soils geochemistry mineralogy |
title_short |
Pathway Weathering in Granitoid Rocks from Central Region of Angola: Geochemical and Mineralogical Data |
title_full |
Pathway Weathering in Granitoid Rocks from Central Region of Angola: Geochemical and Mineralogical Data |
title_fullStr |
Pathway Weathering in Granitoid Rocks from Central Region of Angola: Geochemical and Mineralogical Data |
title_full_unstemmed |
Pathway Weathering in Granitoid Rocks from Central Region of Angola: Geochemical and Mineralogical Data |
title_sort |
Pathway Weathering in Granitoid Rocks from Central Region of Angola: Geochemical and Mineralogical Data |
author |
Duarte, Isabel M. R. |
author_facet |
Duarte, Isabel M. R. Mirão, José A. P. Rocha, Fernando J. T. Bonito, Fernando A. B. Queta, Felisberto M. Falcão, Winnie |
author_role |
author |
author2 |
Mirão, José A. P. Rocha, Fernando J. T. Bonito, Fernando A. B. Queta, Felisberto M. Falcão, Winnie |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Duarte, Isabel M. R. Mirão, José A. P. Rocha, Fernando J. T. Bonito, Fernando A. B. Queta, Felisberto M. Falcão, Winnie |
dc.subject.por.fl_str_mv |
granitoids weathering residual soils geochemistry mineralogy |
topic |
granitoids weathering residual soils geochemistry mineralogy |
description |
The Central Region of Angola is characterized by the abundance of granitoid rocks, whose weathering “in situ” originated the so-called residual soils. The textural, geochemical and mineralogical properties of these soils depend not only on the chemical composition of parent rock, but mainly on the local climatic and geomorphological characteristics. In the study area, sampling sites were selected, which extend from the region of Kwanza- Norte (Kassenda, Dondo) through Kwanza-Sul (Cangulo, Quibala and Waco Kungo) until the plateau of Huambo, where samples of fresh rock, weathered rock and its residual soil were collected along each weathering profile. Chemical analytical data were determined using X-ray fluorescence (XRF) analysis of the major and minor elements, whereas mineralogical data were determined using X-ray diffraction (XRD), on the samples of rock and on the respective residual soil. The results obtained and their comparative analysis between the sampling sites, as well as along each weathering profile is presented. This paper allows contributing to the knowledge of the geochemical weathering in tropical areas, as is the case of Angola. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-01-01T00:00:00Z 2013-01-30T16:57:34Z 2013-01-30 |
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://hdl.handle.net/10174/8094 http://hdl.handle.net/10174/8094 |
url |
http://hdl.handle.net/10174/8094 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
28 2219-8024 Angolan Journal of Science iduarte@uevora.pt jmirao@uevora.pt tavares.rocha@ua.pt fernandobonito@gmail.com felqueta@yahoo.com.br nair.f.falcao@hotmail.com 247 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
EDUAN |
publisher.none.fl_str_mv |
EDUAN |
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 |
|
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1799136507450097665 |