Looking for traces of life in minerals | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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  Looking for traces of life in minerals

Publication Type:

Journal Article

Source:

Comptes Rendus Palevol, Volume 8, Issue 7, p.617-628 (2009)

ISBN:

1631-0683

Accession Number:

ISI:000273271900003

Keywords:

UMR 7154 ; Minéralogie ; Biomineralization; Magnetite; Carbonate; Geomicrobiology; Biosignature ; Biominéralisation; Magnétite; Carbonate; Géomicrobiologie; Biosignature

Abstract:

Traces of life have been extensively looked for in minerals. It is indeed thought that a wide diversity of living organisms can control the formation of mineral phases and thus may leave imprints of their activity in the morphology, chemistry and crystallographic structure of the mineral end-product. Here, we illustrate the bases and limits of this approach by reviewing some studies on biogenic magnetites and carbonates. More than an exhaustive review, we give a personal view on the limitations provided by an empirical approach based on defining so-called biosignatures and suggest developing a more comprehensive mechanistic understanding of how life controls mineral nucleation and growth and induces potential specific features. To cite this article: K. Benzerara, N. Menguy, C R. Palevol 8 (2009). (C) 2009 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.Résumé