Geochemical characterization of fossil turtles from Tartaruguito outcrop (Upper Cretaceous, Bauru Basin, Presidente Prudente Formation), São Paulo state, southeastern Brazil

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dc.creatorCamila Batista Pinto
dc.creatorMauro Bruno da Silva Lacerda
dc.creatorBernardo Lages Rodrigues
dc.creatorWagner da Nova Mussel
dc.creatorPedro Seyferth Ribeiro Romano
dc.date.accessioned2023-03-02T19:31:57Z
dc.date.accessioned2025-09-08T23:54:51Z
dc.date.available2023-03-02T19:31:57Z
dc.date.issued2020-12
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.identifier.doihttps://doi.org/10.1016/j.jsames.2020.102843
dc.identifier.issn1873-0647
dc.identifier.urihttps://hdl.handle.net/1843/50617
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.rightsAcesso Restrito
dc.subjectGeoquímica analítica
dc.subjectQuímica analítica
dc.subjectRaios X - Difração
dc.subjectEspectroscopia de infravermelho
dc.subjectPaleontologia - São Paulo (Estado)
dc.subjectBacias sedimentares - São Paulo (Estado)
dc.subjectGeologia estratigráfica - Cretáceo
dc.subjectTartaruga fóssil
dc.subjectQuelonio
dc.subjectCalcita
dc.subjectHidroxiapatita
dc.subject.otherAnálise Química
dc.subject.otherBiological activity
dc.subject.otherPowder X-ray diffraction
dc.subject.otherFossil turtles
dc.subject.otherBauru group
dc.subject.otherBauruemys elegans
dc.subject.otherFossil diagenesis
dc.subject.otherPirapozinho locality
dc.titleGeochemical characterization of fossil turtles from Tartaruguito outcrop (Upper Cretaceous, Bauru Basin, Presidente Prudente Formation), São Paulo state, southeastern Brazil
dc.typeArtigo de periódico
local.citation.volume104
local.description.resumoThe Tartaruguito outcrop (Pirapozinho municipality, Presidente Prudente Formation, Bauru Basin) has been considered a Fossil-Lagerstätte due to its exceptional fossil quality and large number of fossils recovered. Despite its historical and paleontological importance, a geochemical composition study of the fossils from this site and their sedimentary matrixes has never been performed. Here, we have analyzed fossil turtle shell fragments and their respective sedimentary matrixes collected at Tartaruguito through Powder X-Ray Diffraction and Infrared Spectroscopy techniques, to determine their geochemical composition and obtain clues regarding the fossil diagenesis processes. The analyses showed that the fossil remains of the side-necked turtle Bauruemys elegans from the Tartaruguito locality are mainly composed of calcite (CaCO3) and hydroxyapatite partially substituted by fluorine (Ca10(PO4)6(OH)2-xFx). The sedimentary matrixes are mostly composed of quartz (SiO2) and calcite, with secondary amounts of feldspar. The presence of calcite on both, fossil and rocky matrix, might indicate that the fossil diagenesis process that occurred at the Tartaruguito locality was permineralization by calcite, especially considering the absence of quartz on the bones of the fossil specimens. Furthermore, the presence of a fluor-hydroxyapatite solid-solution might be a plausible explanation for the quality of fossils recovered in Tartaruguito, due to the better stability of fluorapatite when compared to hydroxyapatite.
local.identifier.orcidhttps://orcid.org/0000-0003-4490-6288
local.identifier.orcidhttps://orcid.org/0000-0002-8403-7884
local.identifier.orcidhttps://orcid.org/0000-0003-0586-5639
local.identifier.orcidhttps://orcid.org/0000-0002-9768-9830
local.identifier.orcidhttps://orcid.org/0000-0002-6819-2729
local.publisher.countryBrasil
local.publisher.departmentICB - DEPARTAMENTO DE ZOOLOGIA
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0895981120303862

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