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dc.contributor.author
Benavente, Cecilia Andrea
dc.contributor.author
D`angelo, José Alejandro
dc.contributor.author
Crespo, Esteban María
dc.contributor.author
Mancuso, Adriana Cecilia
dc.date.available
2016-08-12T18:39:05Z
dc.date.issued
2014-09
dc.identifier.citation
Benavente, Cecilia Andrea; D`angelo, José Alejandro; Crespo, Esteban María; Mancuso, Adriana Cecilia; Chemometric approach to Charophyte preservation (Triassic Cerro Puntudo Formation, Argentina): paleolimnologic implications; Society For Sedimentary Geology; Palaios; 29; 9-2014; 449-459
dc.identifier.issn
0883-1351
dc.identifier.uri
http://hdl.handle.net/11336/7143
dc.description.abstract
A first-time chemometric study of energy-dispersive X-ray (EDX) data of Charophyta gyrogonites is presented. Specimen provenance is a microbialitic carbonate lacustrine succession from the Triassic (Anisian, 243.8 ± 1.9 Ma) of the Cerro Puntudo Formation, San Juan, Argentina. Gyrogonites from three different strata of the succession are studied. Data obtained by EDX include major and minor components, which are analyzed by principal component analysis (PCA). The aim of this study ist wofold: first to determine the preservation features of gyrogonites by way of a chemometric approach (i.e., EDX followed by PCA) and then to infer the likely, original chemical composition of the paleolake inhabited by charophytes. EDX spectra show the presence of O, Ca, and minor elements (e.g., Si and Mg), indicating a predominantly calcium carbonate (CaCO3) composition. Principal component analysis supports differences obtained between central and peripheral areas of the gyrogonites, indicating a higher CaCO3 content in their central part. On the other hand, in their outer part, the CaCO3 diminishes and the presence of Si compounds is recorded. No significant differences among gyrogonites from the three different strata are found, implying a similar preservation mode. This suggests a differential diagenetic pattern for the external cells of the gyrogonites than their centers. These results have implications regarding the chemical composition of the paleolake water (Si and Ca availability) and the provenance and catchment areas. Results are encouraging regarding the usefulness of a chemometric approach for studies of fossil remains in lacustrine environments when other techniques of chemical analysis are not available.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Society For Sedimentary Geology
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Carofitas
dc.subject
Quimica
dc.subject
Paleontologia
dc.subject
Lagoa
dc.subject.classification
Paleontología
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Chemometric approach to Charophyte preservation (Triassic Cerro Puntudo Formation, Argentina): paleolimnologic implications
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-08-04T18:17:56Z
dc.journal.volume
29
dc.journal.pagination
449-459
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Lawrence
dc.description.fil
Fil: Benavente, Cecilia Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
dc.description.fil
Fil: D`angelo, José Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina
dc.description.fil
Fil: Crespo, Esteban María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis; Argentina. Universidad Nacional de San Luis; Argentina
dc.description.fil
Fil: Mancuso, Adriana Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
dc.journal.title
Palaios
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.2110/palo.2014.060
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://palaios.geoscienceworld.org/content/29/9/449.full.pdf+html
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/10.2110/palo.2014.060
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