Geochemistry of amphibole asbestos from northeastern Portugal and its use in monitoring the environmental impact of asbestos from quarrying

Detalhes bibliográficos
Autor(a) principal: Teixeira,R. J. S.
Data de Publicação: 2010
Outros Autores: Neiva,A. M. R., Gomes,M. E. P.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://scielo.pt/scielo.php?script=sci_arttext&pid=S1647-581X2010000100007
Resumo: At Donai, Pena Maquieira, and Mourisqueiro, in northeastern Portugal, amphibole asbestos minerals are associated with serpentinites, amphibole schists and steatitic rocks. In order to assess the environmental impact of these deposits, the Donai quarry and the talc mines of Pena Maquieira and Mourisqueiro were studied in detail, because long-term exposure to amphibole asbestos is known to cause pulmonary diseases. At Donai, tremolite asbestos occurs in shear zones and faults cutting serpentinites, whereas massive (non-fibrous) tremolite occurs as intercalations associated with amphibole schists, and chloritites. Serpentinites from the Donai quarry are mainly tremolite-free. At Pena Maquieira, tremolite asbestos fills faults cutting serpentinites. At Mourisqueiro, actinolite asbestos occurs within amphibole schists and steatitic rocks in a highly deformed zone. Geological mapping, examinations by petrographic microscope and electron-microprobe, and determinations of SiO2, CaO, and MgO for serpentinites, and CaO and MgO for steatitic rocks will help to assess the presence of admixed asbestos within these rocks. The identification of asbestos is essential in order to exploit these serpentinites and steatitic rocks with minimal disturbance of asbestiform minerals.
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spelling Geochemistry of amphibole asbestos from northeastern Portugal and its use in monitoring the environmental impact of asbestos from quarryingTremolite and actinolite asbestosamphibole schistsserpentinitessteatitic rocksAt Donai, Pena Maquieira, and Mourisqueiro, in northeastern Portugal, amphibole asbestos minerals are associated with serpentinites, amphibole schists and steatitic rocks. In order to assess the environmental impact of these deposits, the Donai quarry and the talc mines of Pena Maquieira and Mourisqueiro were studied in detail, because long-term exposure to amphibole asbestos is known to cause pulmonary diseases. At Donai, tremolite asbestos occurs in shear zones and faults cutting serpentinites, whereas massive (non-fibrous) tremolite occurs as intercalations associated with amphibole schists, and chloritites. Serpentinites from the Donai quarry are mainly tremolite-free. At Pena Maquieira, tremolite asbestos fills faults cutting serpentinites. At Mourisqueiro, actinolite asbestos occurs within amphibole schists and steatitic rocks in a highly deformed zone. Geological mapping, examinations by petrographic microscope and electron-microprobe, and determinations of SiO2, CaO, and MgO for serpentinites, and CaO and MgO for steatitic rocks will help to assess the presence of admixed asbestos within these rocks. The identification of asbestos is essential in order to exploit these serpentinites and steatitic rocks with minimal disturbance of asbestiform minerals.LNEG - Laboratório Nacional de Energia e Geologia2010-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articletext/htmlhttp://scielo.pt/scielo.php?script=sci_arttext&pid=S1647-581X2010000100007Comunicações Geológicas n.97 2010reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAPenghttp://scielo.pt/scielo.php?script=sci_arttext&pid=S1647-581X2010000100007Teixeira,R. J. S.Neiva,A. M. R.Gomes,M. E. P.info:eu-repo/semantics/openAccess2024-02-06T17:25:04Zoai:scielo:S1647-581X2010000100007Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:30:39.463859Repositório 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 Geochemistry of amphibole asbestos from northeastern Portugal and its use in monitoring the environmental impact of asbestos from quarrying
title Geochemistry of amphibole asbestos from northeastern Portugal and its use in monitoring the environmental impact of asbestos from quarrying
spellingShingle Geochemistry of amphibole asbestos from northeastern Portugal and its use in monitoring the environmental impact of asbestos from quarrying
Teixeira,R. J. S.
Tremolite and actinolite asbestos
amphibole schists
serpentinites
steatitic rocks
title_short Geochemistry of amphibole asbestos from northeastern Portugal and its use in monitoring the environmental impact of asbestos from quarrying
title_full Geochemistry of amphibole asbestos from northeastern Portugal and its use in monitoring the environmental impact of asbestos from quarrying
title_fullStr Geochemistry of amphibole asbestos from northeastern Portugal and its use in monitoring the environmental impact of asbestos from quarrying
title_full_unstemmed Geochemistry of amphibole asbestos from northeastern Portugal and its use in monitoring the environmental impact of asbestos from quarrying
title_sort Geochemistry of amphibole asbestos from northeastern Portugal and its use in monitoring the environmental impact of asbestos from quarrying
author Teixeira,R. J. S.
author_facet Teixeira,R. J. S.
Neiva,A. M. R.
Gomes,M. E. P.
author_role author
author2 Neiva,A. M. R.
Gomes,M. E. P.
author2_role author
author
dc.contributor.author.fl_str_mv Teixeira,R. J. S.
Neiva,A. M. R.
Gomes,M. E. P.
dc.subject.por.fl_str_mv Tremolite and actinolite asbestos
amphibole schists
serpentinites
steatitic rocks
topic Tremolite and actinolite asbestos
amphibole schists
serpentinites
steatitic rocks
description At Donai, Pena Maquieira, and Mourisqueiro, in northeastern Portugal, amphibole asbestos minerals are associated with serpentinites, amphibole schists and steatitic rocks. In order to assess the environmental impact of these deposits, the Donai quarry and the talc mines of Pena Maquieira and Mourisqueiro were studied in detail, because long-term exposure to amphibole asbestos is known to cause pulmonary diseases. At Donai, tremolite asbestos occurs in shear zones and faults cutting serpentinites, whereas massive (non-fibrous) tremolite occurs as intercalations associated with amphibole schists, and chloritites. Serpentinites from the Donai quarry are mainly tremolite-free. At Pena Maquieira, tremolite asbestos fills faults cutting serpentinites. At Mourisqueiro, actinolite asbestos occurs within amphibole schists and steatitic rocks in a highly deformed zone. Geological mapping, examinations by petrographic microscope and electron-microprobe, and determinations of SiO2, CaO, and MgO for serpentinites, and CaO and MgO for steatitic rocks will help to assess the presence of admixed asbestos within these rocks. The identification of asbestos is essential in order to exploit these serpentinites and steatitic rocks with minimal disturbance of asbestiform minerals.
publishDate 2010
dc.date.none.fl_str_mv 2010-01-01
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dc.identifier.uri.fl_str_mv http://scielo.pt/scielo.php?script=sci_arttext&pid=S1647-581X2010000100007
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dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv LNEG - Laboratório Nacional de Energia e Geologia
publisher.none.fl_str_mv LNEG - Laboratório Nacional de Energia e Geologia
dc.source.none.fl_str_mv Comunicações Geológicas n.97 2010
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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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
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