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  Rapid, direct and non-destructive assessment of fossil organic matter via microRaman spectroscopy

Ferralis, N., Matys, E. D., Knoll, A. H., Hallmann, C., & Summons, R. E. (2016). Rapid, direct and non-destructive assessment of fossil organic matter via microRaman spectroscopy. Carbon, 108, 440-449. doi: 10.1016/j.carbon.2016.07.039.

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Ferralis, Nicola, Author
Matys, Emily D., Author
Knoll, Andrew H., Author
Hallmann, Christian1, Author           
Summons, Roger E., Author
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1Research Group Organic Paleo-Biogeochemistry, Dr. C. Hallmann, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497763              

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 Abstract: Raman spectroscopy is widely used to evaluate the nature and potential origins of carbonaceous matter in Earth's oldest rocks and minerals. It is also the tool that will be used for organic detection on the next vehicles to remotely explore the surface of Mars. Here we present, for the first time, a novel quantitative method in which previously neglected Raman spectral features are correlated directly, linearly, and with excellent accuracy, to the microchemistry of carbonaceous materials through the elemental H:C ratio, regardless of contamination. We show applicability and predictive capabilities of this methodology in evaluating H:C ratios between 0.01 and 0.65 in Archean and type III kerogens. We demonstrate its application to chemical microRaman mapping by statistical analysis of a 750Ma microfossil and its encompassing sediments. Raman-derived H:C data can also be used to estimate the degree to which kerogen C-isotopic data has been shifted from its original values due to the effects of metamorphism. The new methodology directly and non-invasively affords spatially resolved assessments of organic matter preservation and microscale chemical diversity within any geologically preserved terrestrial or extraterrestrial sample, including in the use of organic matter in technological applications.

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 Dates: 2016-07-162016-07-192016
 Publication Status: Issued
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 Rev. Type: -
 Identifiers: Other: BGC2519
DOI: 10.1016/j.carbon.2016.07.039
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Title: Carbon
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 108 Sequence Number: - Start / End Page: 440 - 449 Identifier: ISSN: 0008-6223
CoNE: https://pure.mpg.de/cone/journals/resource/954925388220