Biogenic marine bacteria of the Siderococcus genus from paleontological and astrobiological points of view

A. I. Gorshkov; A. V. Sivtsov; I. K. Sheglova; V. V. Balashova

doi:10.1117/12.486684

30 January 2003 Biogenic marine bacteria of Siderococcus genus from paleontological and astrobiological point of view

A. I. Gorshkov, A. V. Sivtsov, I. K. Sheglova, V. V. Balashova

Proceedings Volume 4939, Instruments, Methods, and Missions for Astrobiology VI; (2003) https://doi.org/10.1117/12.486684
Event: Instruments, Methods, and Missions for Astrobiology V, 2002, Moscow, Russian Federation

Abstract

Biogenic mineral formation in the culture of marine psychrophilic ferrioxidizing bacteria of Siderococcus genus is studied in this work. During this process, hematite was formed through ferrihydride. The method of microdiffraction of mineral's electrons on ultrafine cuts showed hematite sedimentation on the surface of the cells deprived of cell walls. Fine homogeneity of this mineral is vindicated. The laboratory model of evolutionary ancient marine bacteria Siderococcus was used to show the formation of hypergene oxides: protoferrihydride -- ferrihydride -- hematite. Microdiffractional analysis of biogenic material, which was taken from technogene zone, gave additional characteristic of the ecosystem through the detection of hematite mineral modification, which was formed by ingress of seawater Pb ions into the structure of the mineral.

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A. I. Gorshkov, A. V. Sivtsov, I. K. Sheglova, and V. V. Balashova "Biogenic marine bacteria of Siderococcus genus from paleontological and astrobiological point of view", Proc. SPIE 4939, Instruments, Methods, and Missions for Astrobiology VI, (30 January 2003); https://doi.org/10.1117/12.486684

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