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

AuthorsGarcía Ruiz, Juan Manuel ; Hyde, Stephen T.; Carnerup, A. M.; Christy, A. G.; Van Kranendonk, M. J.; Welham, N. J.
KeywordsCarbonate crystals
Inorganic micron-sized filaments
Noncrystallographic morphologies
Cyanobacterial microfossils
Issue Date14-Nov-2003
PublisherAmerican Association for the Advancement of Science
CitationScience 302(5648): 1194-1197 (2003)
AbstractWe 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.
Description4 pages.-- PMID: 14615534 [PubMed].
Publisher version (URL)http://dx.doi.org/10.1126/science.1090163
Appears in Collections:(IACT) Artículos
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