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Carbonaceous chondrites: tracers of the prebiotic chemical evolution of the Solar System

Published online by Cambridge University Press:  08 September 2005

Anja C. Andersen
Affiliation:
NORDITA, Blegdamsvej 17, 2100 Copenhagen, Denmark e-mail: anja@nordita.dk
Henning Haack
Affiliation:
Geological Museum, Øster Voldgade 5–7, 1350 Copenhagen, Denmark

Abstract

The astrobiological relevance of carbonaceous chondrites is reviewed. It is argued that the primitive meteorites called carbonaceous chondrites provide a unique source of information about the materials and conditions in the Solar System during the earliest phases of its history, and its subsequent evolution. Presolar dust grains extracted from the carbonaceous chondrites provide direct information on the previous generations of stars that provided the materials present for planet formation. The organic material found in carbonaceous chondrites consist of amino acids, carboxylic acids and sugar derivatives. Part of the amino acids found show L-enantiomeric excesses, which indicates that homochirality on Earth could be a direct result of input from meteoritic material to the early Earth.

Type
Research Article
Copyright
2005 Cambridge University Press

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