Mineralogical Identification of Traces of Life
Many organisms impact mineral nucleation and growth. This results in the formation of biominerals with chemical, structural and textural properties providing clues to their biogenicity. However, ageing modifies these properties to some extent. Moreover, some abiotic processes form minerals with similar properties. Therefore, decoding traces of life in minerals requires caution, and one prerequisite is a reliable estimation of the geochemical conditions under which a biomineral formed. Here we discuss several examples of biominerals which illustrate these different ideas.
Karim Benzerara was supported by funding from the European Research Council under the European Community’s Seventh Framework Programme (FP7/2007–2013 Grant Agreement no. 307110—ERC CALCYAN). Sylvain Bernard was supported by funding from the European Research Council under the European Community’s Seventh Framework Programme (FP7/2007–2013 Grant Agreement no. 161764—ERC PaleoNanoLife—PI: F. Robert). Jennyfer Miot was supported by funding from the French Agence Nationale de la Recherche (ANR SRB project, grant ANR-14-CE33-0003-01). The SEM facility of the IMPMC is supported by Région Ile de France grant SESAME 2006 N°I-07-593/R, INSU/CNRS, UPMC-Paris 6, and by the Agence Nationale de la Recherche (ANR grant No. ANR-07-BLAN-0124-01. We thank Sebastien Charron and Imene Esteve for their expert support of the SEM at IMPMC. The TEM facility at IMPMC is supported by Région Ile de France grant SESAME 2000 E 1435. We thank Jean-Michel Guigner for his expert support of the TEM at IMPMC.
- Benzerara K, Miot J (2011) Biomineralization mechanisms. In: Gargaud M, López-Garcia P, Martin H (eds) Origins and evolution of life – an astrobiological perspective. Cambridge University Press, Cambridge, pp 450–468Google Scholar
- Benzerara K, Meibom A, Gautier Q et al (2010) Nanotextures of aragonite in stromatolites from the quasi-marine Satonda crater lake, Indonesia. In: Pedley HM, Rogerson M (eds) Tufas and speleothems: unravelling the microbial and physical controls, vol 336. Geological Society, London, Special Publications, pp 211–224ADSCrossRefGoogle Scholar
- Miot J, Maclellan K, Benzerara K et al (2011) Preservation of protein globules and peptidoglycan in the mineralized cell wall of nitrate-reducing, iron(II)-oxidizing bacteria: a cryo-electron microscopy study: persistence of organics in mineralized Fe-oxidizing bacteria. Geobiology 9:459–470CrossRefGoogle Scholar
- Nickel EH, Grice JD (1998) The IMA commission on new minerals and mineral names: procedures and guidelines on mineral nomenclature, 1998. Can Mineral 36:913–926Google Scholar