Document details

Caracterização geoquímica da diagénese em dentes de saurópodes como suporte aos estudos isotópicos

Author(s): da Silva, R. ; Camilo, B. ; Balbino, A. ; Barrulas, P. ; Costa, M. ; Ribeiro, C.

Date: 2025

Persistent ID: http://hdl.handle.net/10362/200900

Origin: Repositório Institucional da UNL

Subject(s): diagenetic processes; geochemistry; Mineralogy; Sauropoda; Upper Jurassic; Renewable Energy, Sustainability and the Environment; Environmental Science (miscellaneous); General Earth and Planetary Sciences; SDG 7 - Affordable and Clean Energy; diagenetic processes; diagenetic processes; geochemistry; geochemistry; Mineralogy; Mineralogy; Sauropoda; Sauropoda; Upper Jurassic; Upper Jurassic; Renewable Energy, Sustainability and the Environment; Renewable Energy, Sustainability and the Environment; Environmental Science (miscellaneous); Environmental Science (miscellaneous); General Earth and Planetary Sciences; General Earth and Planetary Sciences; SDG 7 - Affordable and Clean Energy; SDG 7 - Affordable and Clean Energy


Description

Detailed mineralogical and geochemical studies (μ-XRD, μ-XRF, SEM-EDS, LA-ICP-MS) were carried out on sauropod teeth from the Upper Jurassic of the central sector of the Lusitanian Basin. μ-XRD revealed the consistent mineralogical composition of the samples (hydroxyapatite), and μ-XRF confirmed that the chemical composition of the teeth is dominated by Ca and P, with minor concentrations of Fe, Mg, Mn, Al, and K. SEM imaging revealed higher porosity in the dentine compared to the enamel, making it less resistant to post-depositional chemical changes resulting from interaction with formational fluids. LA-ICP-MS maps of trace elements distribution in the teeth allowed us to delimit areas where the original chemical composition is altered due to diagenetic processes, and areas where is preserved the original geochemical signature.

Document Type Journal article
Language Portuguese
Contributor(s) RUN; GeoBioTec - Geobiociências, Geoengenharias e Geotecnologias; LNEG - Laboratório Nacional de Energia e Geologia
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