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Evaluating Biogenicity on the Geological Record With Synchrotron-Based Techniques.

Flavia Callefo1, Lara Maldanis1,2, Verônica C Teixeira1

  • 1Brazilian Synchrotron Light Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, Brazil.

Frontiers in Microbiology
|November 5, 2019
PubMed
Summary

Investigating ancient geological materials for signs of life (biosignatures) is challenging. Synchrotron-based techniques offer high sensitivity and resolution to analyze these ancient traces, aiding the search for early life on Earth and beyond.

Keywords:
biogenicitybiostructuresimagingspectroscopysynchrotron

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Area of Science:

  • Paleobiology
  • Astrobiology
  • Geochemistry

Background:

  • The biogenicity of geological materials is a significant challenge in paleo- and astrobiology.
  • Ancient life traces (biosignatures) become ambiguous over geological time.
  • Few Archaean metasedimentary rocks preserve potential biosignatures, and consensus on their origin is lacking.

Purpose of the Study:

  • To explore the application of synchrotron-based techniques for analyzing geological biosignatures.
  • To highlight how advanced synchrotron sources can improve the study of early life evidence.
  • To discuss potential analytical approaches for extraterrestrial biosignature detection.

Main Methods:

  • Overview of selected synchrotron-based techniques.
  • Analysis of X-ray and matter interactions with geological materials.
  • Utilizing high sensitivity and resolution of new generation synchrotron sources.

Main Results:

  • Synchrotron techniques provide insights into morphology, elemental composition, oxidation states, crystalline structure, and magnetic properties.
  • These analyses can measurably contribute to the biogenicity investigation of putative biosignatures.
  • Advanced synchrotron sources offer enhanced capabilities for studying ancient life evidence.

Conclusions:

  • Synchrotron-based techniques are powerful tools for investigating geological biosignatures.
  • Future synchrotron developments will advance the understanding of early life on Earth.
  • These methods hold promise for the search for biosignatures in extraterrestrial samples.