Estudio diagenético en conchas de braquiópodos de la cuenca del Guadiato (Mississippiense, SO del Macizo Ibérico)

Detailed petrographic and geochemical analyses of brachiopod shells from the Guadiato Carboniferous basin (Córdoba, SW Iberian Massif) has been carried out in order to evaluate their textural and geochemical preservation degree and their potential to be used as indicators of paleoenvironmental chang...

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Bibliographic Details
Authors: Armendáriz, M., Rosales, Idoia, Quesada, C.
Format: article
Publication Date:2007
Country:España
Institution:Universidad de Huelva (UHU)
Repository:Arias Montano. Repositorio Institucional de la Universidad de Huelva
Language:Spanish
OAI Identifier:oai:ariasmontano.uhu.es:10272/8408
Online Access:http://hdl.handle.net/10272/8408
Access Level:Open access
Keyword:Brachiopods
Diagenesis
Cathodoluminescence
Mississippian
Guadiato Basin
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spelling Estudio diagenético en conchas de braquiópodos de la cuenca del Guadiato (Mississippiense, SO del Macizo Ibérico)Diagenetic study of brachiopod shells from the Guadiato basin (Mississippian, SW Iberian Massif)Armendáriz, M.Rosales, IdoiaQuesada, C.BrachiopodsDiagenesisCathodoluminescenceMississippianGuadiato BasinDetailed petrographic and geochemical analyses of brachiopod shells from the Guadiato Carboniferous basin (Córdoba, SW Iberian Massif) has been carried out in order to evaluate their textural and geochemical preservation degree and their potential to be used as indicators of paleoenvironmental changes during the Carboniferous. The preservation degree of the shell´s microstructure has been evaluated by petrographic microscope, cathodoluminescence (CL) and scanning electron microscope (SEM). Under CL, ventral valves are mainly nonluminescent (NL) or nonluminescent with small slightly luminescent areas (NL-SL). In contrast, most of the dorsal valves are luminescent with moderate luminescent areas (ML-L). Under SEM, the samples show very well preserved lamellar and fibrous microstructures. The elemental contents (Ca, Mg, Sr, Mn and Fe) for the NL portions agree with elemental contents of modern brachiopods in equilibrium with ambient seawater and that have not undergone significant diagenetic modification. Therefore, our findings reveal a better microstructural preservation of the ventral valves of Gigantoproductids than the dorsal valves. The NL and NL-SL shell portions present the better microstructural and geochemical preservation and are interpreted to reflect the original isotopic and chemical composition of the marine water from which they precipitated20072007-01-0120072007-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10272/8408reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelvainstname:Universidad de Huelva (UHU)Españolspaopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:ariasmontano.uhu.es:10272/84082026-06-02T14:58:11Z
dc.title.none.fl_str_mv Estudio diagenético en conchas de braquiópodos de la cuenca del Guadiato (Mississippiense, SO del Macizo Ibérico)
Diagenetic study of brachiopod shells from the Guadiato basin (Mississippian, SW Iberian Massif)
title Estudio diagenético en conchas de braquiópodos de la cuenca del Guadiato (Mississippiense, SO del Macizo Ibérico)
spellingShingle Estudio diagenético en conchas de braquiópodos de la cuenca del Guadiato (Mississippiense, SO del Macizo Ibérico)
Armendáriz, M.
Brachiopods
Diagenesis
Cathodoluminescence
Mississippian
Guadiato Basin
title_short Estudio diagenético en conchas de braquiópodos de la cuenca del Guadiato (Mississippiense, SO del Macizo Ibérico)
title_full Estudio diagenético en conchas de braquiópodos de la cuenca del Guadiato (Mississippiense, SO del Macizo Ibérico)
title_fullStr Estudio diagenético en conchas de braquiópodos de la cuenca del Guadiato (Mississippiense, SO del Macizo Ibérico)
title_full_unstemmed Estudio diagenético en conchas de braquiópodos de la cuenca del Guadiato (Mississippiense, SO del Macizo Ibérico)
title_sort Estudio diagenético en conchas de braquiópodos de la cuenca del Guadiato (Mississippiense, SO del Macizo Ibérico)
dc.creator.none.fl_str_mv Armendáriz, M.
Rosales, Idoia
Quesada, C.
author Armendáriz, M.
author_facet Armendáriz, M.
Rosales, Idoia
Quesada, C.
author_role author
author2 Rosales, Idoia
Quesada, C.
author2_role author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Brachiopods
Diagenesis
Cathodoluminescence
Mississippian
Guadiato Basin
topic Brachiopods
Diagenesis
Cathodoluminescence
Mississippian
Guadiato Basin
description Detailed petrographic and geochemical analyses of brachiopod shells from the Guadiato Carboniferous basin (Córdoba, SW Iberian Massif) has been carried out in order to evaluate their textural and geochemical preservation degree and their potential to be used as indicators of paleoenvironmental changes during the Carboniferous. The preservation degree of the shell´s microstructure has been evaluated by petrographic microscope, cathodoluminescence (CL) and scanning electron microscope (SEM). Under CL, ventral valves are mainly nonluminescent (NL) or nonluminescent with small slightly luminescent areas (NL-SL). In contrast, most of the dorsal valves are luminescent with moderate luminescent areas (ML-L). Under SEM, the samples show very well preserved lamellar and fibrous microstructures. The elemental contents (Ca, Mg, Sr, Mn and Fe) for the NL portions agree with elemental contents of modern brachiopods in equilibrium with ambient seawater and that have not undergone significant diagenetic modification. Therefore, our findings reveal a better microstructural preservation of the ventral valves of Gigantoproductids than the dorsal valves. The NL and NL-SL shell portions present the better microstructural and geochemical preservation and are interpreted to reflect the original isotopic and chemical composition of the marine water from which they precipitated
publishDate 2007
dc.date.none.fl_str_mv 2007
2007-01-01
2007
2007-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10272/8408
url http://hdl.handle.net/10272/8408
dc.language.none.fl_str_mv Español
spa
language_invalid_str_mv Español
language spa
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelva
instname:Universidad de Huelva (UHU)
instname_str Universidad de Huelva (UHU)
reponame_str Arias Montano. Repositorio Institucional de la Universidad de Huelva
collection Arias Montano. Repositorio Institucional de la Universidad de Huelva
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repository.mail.fl_str_mv
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