Trace Elemental Imaging of Rare Earth Elements Discriminates Tissues at Microscale in Flat Fossils
| Autor: | Pierre Gueriau, Cristian Mocuta, Didier B Dutheil, Serge X Cohen, Dominique Thiaudière, OT1 Consortium, Sylvain Charbonnier, Gaël Clément, Loïc Bertrand |
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| Přispěvatelé: | Institut photonique d'analyse non-destructive européen des matériaux anciens (IPANEMA), Muséum national d'Histoire naturelle (MNHN)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Ministère de la Culture (MC), Centre de Recherche en Paléontologie - Paris (CR2P), Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), 15 passage du Buisson Saint-Louis, Paris, ANR-10-BLAN-0607,TERRES,Perspectives globales sur le processus de Terrestrialisation(2010) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Elemental imaging
Taphonomy Paleo-environment Science Vertebrate Paleontology Materials Science Rare earth X-ray fluorescence Data analysis Mineralogy Biology Fossilization Paleontology Penaeidae Animals Statistical Methods Microstructure Microscale chemistry [PHYS]Physics [physics] Multidisciplinary Fossils Physics Electromagnetic Radiation X-Rays Paleobiology Statistics Fishes Spectrometry X-Ray Emission Fossil Trace (semiology) Earth Sciences Medicine Invertebrate Paleontology Materials Characterization Metals Rare Earth Sedimentary rock Paleoecology [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology Mathematics Synchrotrons [PHYS.PHYS.PHYS-DATA-AN]Physics [physics]/Physics [physics]/Data Analysis Statistics and Probability [physics.data-an] Research Article |
| Zdroj: | PLoS ONE PLoS ONE, Public Library of Science, 2014, 9 (1), pp.e86946. ⟨10.1371/journal.pone.0086946⟩ PLoS ONE, Vol 9, Iss 1, p e86946 (2014) |
| ISSN: | 1932-6203 |
| DOI: | 10.1371/journal.pone.0086946⟩ |
| Popis: | The OT1 Consortium; International audience; The interpretation of flattened fossils remains a major challenge due to compression of their complex anatomies during fossilization, making critical anatomical features invisible or hardly discernible. Key features are often hidden under greatly preserved decay prone tissues, or an unpreparable sedimentary matrix. A method offering access to such anatomical features is of paramount interest to resolve taxonomic affinities and to study fossils after a least possible invasive preparation. Unfortunately, the widely-used X-ray micro-computed tomography, for visualizing hidden or internal structures of a broad range of fossils, is generally inapplicable to flattened specimens, due to the very high differential absorbance in distinct directions. Here we show that synchrotron X-ray fluorescence spectral raster-scanning coupled to spectral decomposition or a much faster Kullback-Leibler divergence based statistical analysis provides microscale visualization of tissues. We imaged exceptionally well-preserved fossils from the Late Cretaceous without needing any prior delicate preparation. The contrasting elemental distributions greatly improved the discrimination of skeletal elements material from both the sedimentary matrix and fossilized soft tissues. Aside content in alkaline earth elements and phosphorus, a critical parameter for tissue discrimination is the distinct amounts of rare earth elements. Local quantification of rare earths may open new avenues for fossil description but also in paleoenvironmental and taphonomical studies. |
| Databáze: | OpenAIRE |
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