NDLI: Self-Assembled Silica-Carbonate Structures and Detection of Ancient Microfossils

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Self-Assembled Silica-Carbonate Structures and Detection of Ancient Microfossils

Content Provider	Scilit
Editor	García-Ruiz, J. M. Hyde, S. T. Carnerup, A. M. Christy, A. G. Kranendonk, M. J. Van Welham, N. J.
Copyright Year	2003
Description	We have synthesized inorganic micron-sized filaments, whose microstucture consists of silica-coated nanometer-sized carbonate crystals, arranged with strong orientational order. They exhibit noncrystallographic, curved, helical morphologies, reminiscent of biological forms. The filaments are similar to supposed cyanobacterial microfossils from the Precambrian Warrawoona chert formation in Western Australia, reputed to be the oldest terrestrial microfossils. Simple organic hydrocarbons, whose sources may also be abiotic and indeed inorganic, readily condense onto these filaments and subsequently polymerize under gentle heating to yield kerogenous products. Our results demonstrate that abiotic and morphologically complex microstructures that are identical to currently accepted biogenic materials can be synthesized inorganically.
Related Links	http://courses.washington.edu/bangblue/Garcia-Ruiz_Inorg_ppt_biogenicity-Sci03.pdf http://www.sciencemag.org/content/302/5648/1191.full.pdf
Ending Page	1197
Page Count	4
Starting Page	1194
ISSN	00368075
e-ISSN	10959203
DOI	10.1126/science.1090163
Journal	Science
Issue Number	5648
Volume Number	302
Language	English
Publisher	American Association for the Advancement of Science (AAAS)
Publisher Date	2003-11-14
Access Restriction	Open
Content Type	Text
Resource Type	Article
Subject	History and Philosophy of Science

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