publication . Article . 2019

Carbon speciation in organic fossils using 2D to 3D x-ray Raman multispectral imaging

Georgiou, Rafaella; Gueriau, Pierre; Sahle, Christoph J.; Bernard, Sylvain; Mirone, Alessandro; Garrouste, Romain; Bergmann, Uwe; Rueff, Jean-Pascal; Bertrand, Loïc;
Open Access English
  • Published: 30 Aug 2019 Journal: Science Advances, volume 5, issue 8 (eissn: 2375-2548, Copyright policy)
  • Publisher: American Association for the Advancement of Science
  • Country: France
The in situ two-dimensional (2D) and 3D imaging of the chemical speciation of organic fossils is an unsolved problem in paleontology and cultural heritage. Here, we use x-ray Raman scattering (XRS)–based imaging at the carbon K-edge to form 2D and 3D images of the carbon chemistry in two exceptionally preserved specimens, a fossil plant dating back from the Carboniferous and an ancient insect entrapped in 53-million-year-old amber. The 2D XRS imaging of the plant fossil reveals a homogeneous chemical composition with micrometric “pockets” of preservation, likely inherited from its geological history. The 3D XRS imaging of the insect cuticle displays an exceptionally well preserved remaining chemical signature typical of polysaccharides such as chitin around a largely hollowed-out inclusion. Our results open up new perspectives for in situ chemical speciation imaging of fossilized organic materials, with the potential to enhance our understanding of organic specimens and their paleobiology.
X-ray Raman multispectral imaging identifies the 3D chemistry of carbon in entire organic paleontological specimens.
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free text keywords: Research Article, Research Articles, SciAdv r-articles, Materials Science, Paleontology, Applied Sciences and Engineering, Raman, X-ray, Amber, Insect, Ant, Spectral imaging, [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology, [CHIM.MATE]Chemical Sciences/Material chemistry, [PHYS]Physics [physics], [SHS.MUSEO]Humanities and Social Sciences/Cultural heritage and museology, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], [CHIM.ANAL]Chemical Sciences/Analytical chemistry, [SDU]Sciences of the Universe [physics], Multidisciplinary, Carboniferous, Raman spectroscopy, symbols.namesake, symbols, Spectral imaging, medicine.medical_specialty, medicine, Paleobiology, Chemical composition, Mineralogy, Carbon, chemistry.chemical_element, chemistry, In situ, Inclusion (mineral)
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Funded by
Integrated Platform for the European Research Infrastructure ON Cultural Heritage
  • Funder: European Commission (EC)
  • Project Code: 654028
  • Funding stream: H2020 | RIA
The European Research Infrastructure for Heritage Science Preparatory Phase
  • Funder: European Commission (EC)
  • Project Code: 739503
  • Funding stream: H2020 | CSA

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