Carbon Stable Isotope Analyses of Antarctic Micrometeorites

Details Carbon Stable Isotope Analyses of Antarctic Micrometeorites Carbon Stable Isotope Analyses of Antarctic Micrometeorites

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..441g&link_type=abstract

Lunar and Planetary Science, volume 27, page 441

Computer Science

Carbon: Stable Isotopes, Chondrites: Carbonaceous, Interplanetary Dust Particles, Mass Spectrometry, Micrometeorites: Antarctic

Scientific paper

Micrometeorites exhibit a range of carbon contents, which can reach up to 13 x CI1. The carbon abundance of several Antarctic micrometeorites (AMMs) might be up to 2 x CI1. One AMM, extracted from a 100-400 micron size fraction and identified by EELS as having a high carbon content, was analysed by stepped combustion-mass spectrometry. The combustion temperature of the major carbonaceous component (400-600 degrees C) implied that it was an amorphous or poorly-crystalline phase, with a delta ^13C (-18 per mil) similar to that of the major carbonaceous component in carbonaceous chondrites. In addition, there was some evidence for the presence of a small quantity of a ^13C-rich component which combusts around 1000 degrees C.

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