Petrographic and mineralogical characterization of volcanic rocks and surface depositions on Romanesque monuments
Autor(a) principal: | |
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Data de Publicação: | 2018 |
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/10174/31483 https://doi.org/10.5281/zenodo.1256051 |
Resumo: | The stone used on the monuments, especially if they come from ancient times (e.g. medieval period), when exposed to the atmosphere, they are frequently affected by weathering and bio-deterioration processes. Thus, these latter produce various chemical and mineralogical transformations of substrate at the interface with the atmospheric agents as function of intrinsic compositional and physical characteristics of the materi- al. Moreover, if there also are ancient treatments on the surface of geomaterials, the investigation field is fur- ther complicated. This research aims to analyse the surfaces of different volcanic lithology (basalts, andesite, pyroclastic rocks) used in the medieval Romanesque churches of Sardinia (XI-XIV cent.) having high histori- cal-architectural and cultural relevance. By mineralogical and petrographic analysis (OM) and other differ- ent analytical methods (XRPD, colorimetry) the investigations addressed to define: i) petrographic features of volcanic rocks substrate; ii) chemical and mineralogical composition of coatings/crusts and any salt fano- and cryptoefflorescence; iii) compositional and microstratigraphic characterization of ancient treatments (i.e., Ca-oxalate films) on the surface of facades; iv) chromatic modifications of surface with respect to the sub- strate due to the alteration processes. The results show the incidence of several factors in the alteration process, as function of the occurred time, petrophysical features and composition of geomaterials, their position in the monument structure, exposi- tion to the weathering processes, microclimatic characteristics, environmental conditions. |
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Petrographic and mineralogical characterization of volcanic rocks and surface depositions on Romanesque monumentsAlterationMedievalSardiniaPlio-QuaternaryOligo-Miocenic,Ca-oxalatepetrographyRomanesqueThe stone used on the monuments, especially if they come from ancient times (e.g. medieval period), when exposed to the atmosphere, they are frequently affected by weathering and bio-deterioration processes. Thus, these latter produce various chemical and mineralogical transformations of substrate at the interface with the atmospheric agents as function of intrinsic compositional and physical characteristics of the materi- al. Moreover, if there also are ancient treatments on the surface of geomaterials, the investigation field is fur- ther complicated. This research aims to analyse the surfaces of different volcanic lithology (basalts, andesite, pyroclastic rocks) used in the medieval Romanesque churches of Sardinia (XI-XIV cent.) having high histori- cal-architectural and cultural relevance. By mineralogical and petrographic analysis (OM) and other differ- ent analytical methods (XRPD, colorimetry) the investigations addressed to define: i) petrographic features of volcanic rocks substrate; ii) chemical and mineralogical composition of coatings/crusts and any salt fano- and cryptoefflorescence; iii) compositional and microstratigraphic characterization of ancient treatments (i.e., Ca-oxalate films) on the surface of facades; iv) chromatic modifications of surface with respect to the sub- strate due to the alteration processes. The results show the incidence of several factors in the alteration process, as function of the occurred time, petrophysical features and composition of geomaterials, their position in the monument structure, exposi- tion to the weathering processes, microclimatic characteristics, environmental conditions.MAAJOURNALS2022-03-29T13:54:55Z2022-03-292018-03-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/31483http://hdl.handle.net/10174/31483https://doi.org/10.5281/zenodo.1256051enghttp://10.5281/zenodo.1256051columbus@unica.itndfsitzia@uevora.ptpagnotta@unisannio.itndndvincenzo.palleschi@cnr.itmarco.lezzerini(at)unipi.it.marco.giamello@unisi.it396Columbu, StefanoPiras, GiovanniSitzia, FabioPagnotta, StefanoRanieri, SimonaLegnaioli, stefanoPalleschi, VincenzoLezzerini, MarcoGiamello, Marcoinfo: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:RCAAP2024-01-03T19:31:08Zoai:dspace.uevora.pt:10174/31483Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:20:37.595332Repositório 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 |
Petrographic and mineralogical characterization of volcanic rocks and surface depositions on Romanesque monuments |
title |
Petrographic and mineralogical characterization of volcanic rocks and surface depositions on Romanesque monuments |
spellingShingle |
Petrographic and mineralogical characterization of volcanic rocks and surface depositions on Romanesque monuments Columbu, Stefano Alteration Medieval Sardinia Plio-Quaternary Oligo-Miocenic, Ca-oxalate petrography Romanesque |
title_short |
Petrographic and mineralogical characterization of volcanic rocks and surface depositions on Romanesque monuments |
title_full |
Petrographic and mineralogical characterization of volcanic rocks and surface depositions on Romanesque monuments |
title_fullStr |
Petrographic and mineralogical characterization of volcanic rocks and surface depositions on Romanesque monuments |
title_full_unstemmed |
Petrographic and mineralogical characterization of volcanic rocks and surface depositions on Romanesque monuments |
title_sort |
Petrographic and mineralogical characterization of volcanic rocks and surface depositions on Romanesque monuments |
author |
Columbu, Stefano |
author_facet |
Columbu, Stefano Piras, Giovanni Sitzia, Fabio Pagnotta, Stefano Ranieri, Simona Legnaioli, stefano Palleschi, Vincenzo Lezzerini, Marco Giamello, Marco |
author_role |
author |
author2 |
Piras, Giovanni Sitzia, Fabio Pagnotta, Stefano Ranieri, Simona Legnaioli, stefano Palleschi, Vincenzo Lezzerini, Marco Giamello, Marco |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Columbu, Stefano Piras, Giovanni Sitzia, Fabio Pagnotta, Stefano Ranieri, Simona Legnaioli, stefano Palleschi, Vincenzo Lezzerini, Marco Giamello, Marco |
dc.subject.por.fl_str_mv |
Alteration Medieval Sardinia Plio-Quaternary Oligo-Miocenic, Ca-oxalate petrography Romanesque |
topic |
Alteration Medieval Sardinia Plio-Quaternary Oligo-Miocenic, Ca-oxalate petrography Romanesque |
description |
The stone used on the monuments, especially if they come from ancient times (e.g. medieval period), when exposed to the atmosphere, they are frequently affected by weathering and bio-deterioration processes. Thus, these latter produce various chemical and mineralogical transformations of substrate at the interface with the atmospheric agents as function of intrinsic compositional and physical characteristics of the materi- al. Moreover, if there also are ancient treatments on the surface of geomaterials, the investigation field is fur- ther complicated. This research aims to analyse the surfaces of different volcanic lithology (basalts, andesite, pyroclastic rocks) used in the medieval Romanesque churches of Sardinia (XI-XIV cent.) having high histori- cal-architectural and cultural relevance. By mineralogical and petrographic analysis (OM) and other differ- ent analytical methods (XRPD, colorimetry) the investigations addressed to define: i) petrographic features of volcanic rocks substrate; ii) chemical and mineralogical composition of coatings/crusts and any salt fano- and cryptoefflorescence; iii) compositional and microstratigraphic characterization of ancient treatments (i.e., Ca-oxalate films) on the surface of facades; iv) chromatic modifications of surface with respect to the sub- strate due to the alteration processes. The results show the incidence of several factors in the alteration process, as function of the occurred time, petrophysical features and composition of geomaterials, their position in the monument structure, exposi- tion to the weathering processes, microclimatic characteristics, environmental conditions. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-03-01T00:00:00Z 2022-03-29T13:54:55Z 2022-03-29 |
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/10174/31483 http://hdl.handle.net/10174/31483 https://doi.org/10.5281/zenodo.1256051 |
url |
http://hdl.handle.net/10174/31483 https://doi.org/10.5281/zenodo.1256051 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://10.5281/zenodo.1256051 columbus@unica.it nd fsitzia@uevora.pt pagnotta@unisannio.it nd nd vincenzo.palleschi@cnr.it marco.lezzerini(at)unipi.it. marco.giamello@unisi.it 396 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
MAAJOURNALS |
publisher.none.fl_str_mv |
MAAJOURNALS |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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