Impact of wildfires on subsurface volcanic environments: New insights into speleothem chemistry
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/31549 https://doi.org/10.1016/j.scitotenv.2019.134321 |
Resumo: | Siliceous speleothems frequently reported in volcanic caves have been traditionally interpreted as resulting from basalt weathering combined with the activity of microbial communities. A characteristic feature in lava tubes from Hawaii, Azores and Canary Islands is the occurrence of black jelly-like speleothems. Here we describe the formation process of siliceous black speleothems found in a lava tube from La Palma, Canary Islands, Spain, based on mineralogy, microscopy, light stable isotopes, analytical pyrolysis, NMR spectroscopy and chemometric analyses. The data indicate that the black speleothems are composed of a hydrated gel matrix of amorphous aluminum silicate materials containing charred vegetation and thermally degraded resins from pines or triterpenoids from Erica arborea, characteristic of the overlying laurel forest. This is the first observation of a connection between fire and speleothem chemistry from volcanic caves. We conclude that wildfires and organic matter from the surface area overlying caves may play an important role in the formation of speleothems found in La Palma and demonstrate that siliceous speleothems are potential archives for past fires. |
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Impact of wildfires on subsurface volcanic environments: New insights into speleothem chemistryVolcanic cavesWildfiresSoil organic matterAnalytical pyrolysisStable isotopesSiliceous speleothems frequently reported in volcanic caves have been traditionally interpreted as resulting from basalt weathering combined with the activity of microbial communities. A characteristic feature in lava tubes from Hawaii, Azores and Canary Islands is the occurrence of black jelly-like speleothems. Here we describe the formation process of siliceous black speleothems found in a lava tube from La Palma, Canary Islands, Spain, based on mineralogy, microscopy, light stable isotopes, analytical pyrolysis, NMR spectroscopy and chemometric analyses. The data indicate that the black speleothems are composed of a hydrated gel matrix of amorphous aluminum silicate materials containing charred vegetation and thermally degraded resins from pines or triterpenoids from Erica arborea, characteristic of the overlying laurel forest. This is the first observation of a connection between fire and speleothem chemistry from volcanic caves. We conclude that wildfires and organic matter from the surface area overlying caves may play an important role in the formation of speleothems found in La Palma and demonstrate that siliceous speleothems are potential archives for past fires.Elseviers2022-03-30T13:58:20Z2022-03-302020-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/31549http://hdl.handle.net/10174/31549https://doi.org/10.1016/j.scitotenv.2019.134321porMiller AZ, De la Rosa JM, Jiménez-Morillo NT, et al. (2020). Impact of wildfires on subsurface volcanic environments: New insights into speleothem chemistry. Sci. Total Environ. 698; 134321.Science of the total environmentanamiller@uevora.ptndntjm@uevora.ptndndndnd396Miller, Ana Z.De la Rosa, José M.Jiménez-Morillo, Nicasio T.Pereira, Manuel F.CGonzález-Pérez, José A.Knicker, HeikeSaiz-Jimenez, Cesareoinfo: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:RCAAP2024-01-03T19:31:18Zoai:dspace.uevora.pt:10174/31549Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:20:41.628392Repositório 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 |
Impact of wildfires on subsurface volcanic environments: New insights into speleothem chemistry |
title |
Impact of wildfires on subsurface volcanic environments: New insights into speleothem chemistry |
spellingShingle |
Impact of wildfires on subsurface volcanic environments: New insights into speleothem chemistry Miller, Ana Z. Volcanic caves Wildfires Soil organic matter Analytical pyrolysis Stable isotopes |
title_short |
Impact of wildfires on subsurface volcanic environments: New insights into speleothem chemistry |
title_full |
Impact of wildfires on subsurface volcanic environments: New insights into speleothem chemistry |
title_fullStr |
Impact of wildfires on subsurface volcanic environments: New insights into speleothem chemistry |
title_full_unstemmed |
Impact of wildfires on subsurface volcanic environments: New insights into speleothem chemistry |
title_sort |
Impact of wildfires on subsurface volcanic environments: New insights into speleothem chemistry |
author |
Miller, Ana Z. |
author_facet |
Miller, Ana Z. De la Rosa, José M. Jiménez-Morillo, Nicasio T. Pereira, Manuel F.C González-Pérez, José A. Knicker, Heike Saiz-Jimenez, Cesareo |
author_role |
author |
author2 |
De la Rosa, José M. Jiménez-Morillo, Nicasio T. Pereira, Manuel F.C González-Pérez, José A. Knicker, Heike Saiz-Jimenez, Cesareo |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Miller, Ana Z. De la Rosa, José M. Jiménez-Morillo, Nicasio T. Pereira, Manuel F.C González-Pérez, José A. Knicker, Heike Saiz-Jimenez, Cesareo |
dc.subject.por.fl_str_mv |
Volcanic caves Wildfires Soil organic matter Analytical pyrolysis Stable isotopes |
topic |
Volcanic caves Wildfires Soil organic matter Analytical pyrolysis Stable isotopes |
description |
Siliceous speleothems frequently reported in volcanic caves have been traditionally interpreted as resulting from basalt weathering combined with the activity of microbial communities. A characteristic feature in lava tubes from Hawaii, Azores and Canary Islands is the occurrence of black jelly-like speleothems. Here we describe the formation process of siliceous black speleothems found in a lava tube from La Palma, Canary Islands, Spain, based on mineralogy, microscopy, light stable isotopes, analytical pyrolysis, NMR spectroscopy and chemometric analyses. The data indicate that the black speleothems are composed of a hydrated gel matrix of amorphous aluminum silicate materials containing charred vegetation and thermally degraded resins from pines or triterpenoids from Erica arborea, characteristic of the overlying laurel forest. This is the first observation of a connection between fire and speleothem chemistry from volcanic caves. We conclude that wildfires and organic matter from the surface area overlying caves may play an important role in the formation of speleothems found in La Palma and demonstrate that siliceous speleothems are potential archives for past fires. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01T00:00:00Z 2022-03-30T13:58:20Z 2022-03-30 |
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/10174/31549 http://hdl.handle.net/10174/31549 https://doi.org/10.1016/j.scitotenv.2019.134321 |
url |
http://hdl.handle.net/10174/31549 https://doi.org/10.1016/j.scitotenv.2019.134321 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Miller AZ, De la Rosa JM, Jiménez-Morillo NT, et al. (2020). Impact of wildfires on subsurface volcanic environments: New insights into speleothem chemistry. Sci. Total Environ. 698; 134321. Science of the total environment anamiller@uevora.pt nd ntjm@uevora.pt nd nd nd nd 396 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Elseviers |
publisher.none.fl_str_mv |
Elseviers |
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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1799136688812851200 |