Compound-specific isotopic study of carbonaceous choandrites
Compound-specific isotopic study of carbonaceous choandrites: implications for the origin of meteoritic organic compounds. Compound-specific isotopic ratios provide unique insights into the origin and synthetic pathways of organic compounds in carbonaceous meteorites by allowing both recognition of terrestrial contaminants and an understanding of their synthetic histories and genetic relationships.
Despite recent progress, molecular isotopic data available have been limited to a narrow range of organic compounds and to a few meteorites, Murchison, Tagish Lake and Orgueil. We propose to expand our research to all common classes of organic compounds in Murchison and in a suite of Antarctic carbonaceous meteorites in order to answer following outstanding questions: 1) what are the range and variability of isotopic ratios of individual compounds in carbonaceous chondrites? 2) what are the fundamental mechanisms controlling the variability in isotopic compositions? 3) how can molecular isotopic signatures be used to infer the origins of meteoritic organic compounds?
The proposed study will provide new insight into the prebiotic evolution and establish new methods and procedures to characterize samples returned from NASAs future missions, and is closely relevant to the objectives of the NASA Exobiology and the NRA.
Brown faculty collaborators:
Other project collaborators:See publications list.
A sample of carbonaceous chondriteBack to Yongsong Huang's Brown Research Profile