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Proceedings Paper

Hydrothermal endobiosphere in the Miocene-Pliocene lava piles of Iceland as evidenced by mineral structures
Author(s): Alfred R. Geptner; Hrefna Kristmannsdottir
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Paper Abstract

In this paper, the microscopic textures of clay minerals resemble of recent biomorphous layer silicate precipitates are described and the possible environment for their formation discussed. Fossilized biomorphous-like microstructures in clay precipitates in the Miocene and Pliocene basalt piles were identified by comparison with published data on bacterial forms, both living and fossilized. The sizes, shapes, and fabric of the mineral precipitates are the key factors in a successful analysis of biomorphous-like microstructures. The studied morphological types of biomorphous-like microstructures were: rod-like, spheres, filaments, hemispheres and films. The nature of formerly existing hydrothermal systems in the lava piles, has been reconstructed by studies of the present mineral paragenesis and by the analogy with modern hydrothermal mineral precipitation.

Paper Details

Date Published: 30 January 2003
PDF: 17 pages
Proc. SPIE 4939, Instruments, Methods, and Missions for Astrobiology VI, (30 January 2003); doi: 10.1117/12.486687
Show Author Affiliations
Alfred R. Geptner, Geological Institute (Russia)
Hrefna Kristmannsdottir, Univ. of Akureyri (Iceland)

Published in SPIE Proceedings Vol. 4939:
Instruments, Methods, and Missions for Astrobiology VI
Richard B. Hoover; Alexei Yu. Rozanov; Jere H. Lipps, Editor(s)

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