Diagenetic and Biological Overprints in Geochemical Signatures of the Gigantoproductus Tertiary Layer (Brachiopoda): Assessing the Paleoclimatic Interpretation

[EN] Variations in the geochemical signatures of fossil brachiopod shells may be due to diagenesis and/or biological processes (i.e., ‘vital effects’). It is critical to characterise them in order to identify reliable shell areas suitable for paleoclimate studies. This investigation contributes to a...

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Autores: Mateos-Carralafuente, José R., Coronado Vila, Ismael, Cruz Martínez, Juncal Altagracia, Cózar, Pedro, Fernández Martínez, Esperanza, Rodríguez, Sergio
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Universidad de León
Repositorio:BULERIA. Repositorio Institucional de la Universidad de León
OAI Identifier:oai:buleria.unileon.es:10612/21094
Acceso en línea:https://www.mdpi.com/2075-1729/13/3/714
https://hdl.handle.net/10612/21094
Access Level:acceso abierto
Palabra clave:Geología
Paleontología
LPIA
Microstructure
Trace-element partitioning
Stable-isotope fractionation
Serpukhovian
Spain
2416 Paleontología
2506 Geología
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spelling Diagenetic and Biological Overprints in Geochemical Signatures of the Gigantoproductus Tertiary Layer (Brachiopoda): Assessing the Paleoclimatic InterpretationMateos-Carralafuente, José R.Coronado Vila, IsmaelCruz Martínez, Juncal AltagraciaCózar, PedroFernández Martínez, EsperanzaRodríguez, SergioGeologíaPaleontologíaLPIAMicrostructureTrace-element partitioningStable-isotope fractionationSerpukhovianSpain2416 Paleontología2506 Geología[EN] Variations in the geochemical signatures of fossil brachiopod shells may be due to diagenesis and/or biological processes (i.e., ‘vital effects’). It is critical to characterise them in order to identify reliable shell areas suitable for paleoclimate studies. This investigation contributes to an in-depth understanding of geochemical variations in Gigantoproductus sp. shells (SW Spain, Serpukhovian age), throwing light onto the Late Paleozoic Ice Age interpretation. Microstructural, crystallographic, cathodoluminescence and geochemical (minor and trace elements, δ18O, δ13C, and strontium isotopes) characterisations have been performed on the tertiary layer of the ventral valve, to assess the preservation state. Poorly preserved areas exhibit microstructural and geochemical changes such as recrystallisation, fracturing and higher Mn and Fe enrichment. Moreover, these areas have a higher dispersion of 86Sr, 87Sr, δ18O and δ13C than well-preserved areas. Three structural regions have been identified in well-preserved areas of the ventral valve by differences in valve curvature and thickness, such as the umbonal and thick and thin regions. These regions have different proportions of Mg, S, Na, δ18O, and δ13C, which are interpreted as ‘vital effects’ and probably related to growth-rate differences during shell growth. The Gigantoproductus tertiary layer seems the most suitable for paleoclimate studies, because it retains the original microstructure and geochemical composition.SIFinancial support through the Spanish Ministerio de Economía y Competitividad (research project CGL2016-78738-P) and the Complutense University Research Group (910231) is gratefully acknowledged. J.R.M.C. Acknowledges financial support through an FPI-MINECO grant. This article is a contribution to the Spanish Working Group IGCP 596 (UNESCO). We thank the anonymous reviewers and the editors for their help and constructive comments on the text.MDPIGeodinamica ExternaFacultad de Filosofia y Letras2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://www.mdpi.com/2075-1729/13/3/714https://hdl.handle.net/10612/21094reponame:BULERIA. Repositorio Institucional de la Universidad de Leóninstname:Universidad de LeónIngléshttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:buleria.unileon.es:10612/210942026-06-24T12:43:27Z
dc.title.none.fl_str_mv Diagenetic and Biological Overprints in Geochemical Signatures of the Gigantoproductus Tertiary Layer (Brachiopoda): Assessing the Paleoclimatic Interpretation
title Diagenetic and Biological Overprints in Geochemical Signatures of the Gigantoproductus Tertiary Layer (Brachiopoda): Assessing the Paleoclimatic Interpretation
spellingShingle Diagenetic and Biological Overprints in Geochemical Signatures of the Gigantoproductus Tertiary Layer (Brachiopoda): Assessing the Paleoclimatic Interpretation
Mateos-Carralafuente, José R.
Geología
Paleontología
LPIA
Microstructure
Trace-element partitioning
Stable-isotope fractionation
Serpukhovian
Spain
2416 Paleontología
2506 Geología
title_short Diagenetic and Biological Overprints in Geochemical Signatures of the Gigantoproductus Tertiary Layer (Brachiopoda): Assessing the Paleoclimatic Interpretation
title_full Diagenetic and Biological Overprints in Geochemical Signatures of the Gigantoproductus Tertiary Layer (Brachiopoda): Assessing the Paleoclimatic Interpretation
title_fullStr Diagenetic and Biological Overprints in Geochemical Signatures of the Gigantoproductus Tertiary Layer (Brachiopoda): Assessing the Paleoclimatic Interpretation
title_full_unstemmed Diagenetic and Biological Overprints in Geochemical Signatures of the Gigantoproductus Tertiary Layer (Brachiopoda): Assessing the Paleoclimatic Interpretation
title_sort Diagenetic and Biological Overprints in Geochemical Signatures of the Gigantoproductus Tertiary Layer (Brachiopoda): Assessing the Paleoclimatic Interpretation
dc.creator.none.fl_str_mv Mateos-Carralafuente, José R.
Coronado Vila, Ismael
Cruz Martínez, Juncal Altagracia
Cózar, Pedro
Fernández Martínez, Esperanza
Rodríguez, Sergio
author Mateos-Carralafuente, José R.
author_facet Mateos-Carralafuente, José R.
Coronado Vila, Ismael
Cruz Martínez, Juncal Altagracia
Cózar, Pedro
Fernández Martínez, Esperanza
Rodríguez, Sergio
author_role author
author2 Coronado Vila, Ismael
Cruz Martínez, Juncal Altagracia
Cózar, Pedro
Fernández Martínez, Esperanza
Rodríguez, Sergio
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Geodinamica Externa
Facultad de Filosofia y Letras
dc.subject.none.fl_str_mv Geología
Paleontología
LPIA
Microstructure
Trace-element partitioning
Stable-isotope fractionation
Serpukhovian
Spain
2416 Paleontología
2506 Geología
topic Geología
Paleontología
LPIA
Microstructure
Trace-element partitioning
Stable-isotope fractionation
Serpukhovian
Spain
2416 Paleontología
2506 Geología
description [EN] Variations in the geochemical signatures of fossil brachiopod shells may be due to diagenesis and/or biological processes (i.e., ‘vital effects’). It is critical to characterise them in order to identify reliable shell areas suitable for paleoclimate studies. This investigation contributes to an in-depth understanding of geochemical variations in Gigantoproductus sp. shells (SW Spain, Serpukhovian age), throwing light onto the Late Paleozoic Ice Age interpretation. Microstructural, crystallographic, cathodoluminescence and geochemical (minor and trace elements, δ18O, δ13C, and strontium isotopes) characterisations have been performed on the tertiary layer of the ventral valve, to assess the preservation state. Poorly preserved areas exhibit microstructural and geochemical changes such as recrystallisation, fracturing and higher Mn and Fe enrichment. Moreover, these areas have a higher dispersion of 86Sr, 87Sr, δ18O and δ13C than well-preserved areas. Three structural regions have been identified in well-preserved areas of the ventral valve by differences in valve curvature and thickness, such as the umbonal and thick and thin regions. These regions have different proportions of Mg, S, Na, δ18O, and δ13C, which are interpreted as ‘vital effects’ and probably related to growth-rate differences during shell growth. The Gigantoproductus tertiary layer seems the most suitable for paleoclimate studies, because it retains the original microstructure and geochemical composition.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://www.mdpi.com/2075-1729/13/3/714
https://hdl.handle.net/10612/21094
url https://www.mdpi.com/2075-1729/13/3/714
https://hdl.handle.net/10612/21094
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:BULERIA. Repositorio Institucional de la Universidad de León
instname:Universidad de León
instname_str Universidad de León
reponame_str BULERIA. Repositorio Institucional de la Universidad de León
collection BULERIA. Repositorio Institucional de la Universidad de León
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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