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JMDMT #1464 Microfossils of Cyanobacteria in Carbonaceous Meteorites
The James M. DuPont Meteorite Collection - material formed before parent body accretion and may even be presolar. The variation in composition between meteorites can be explained by either mild metamorphism resulting in condensation/graphitization reactions that drove off the least stable material and/or aqueous alteration leading to hydrolysis, isotopic exchange and even organic synthesis. This explanation is consistent with the observed correlation between the degree of alkylation of PAHs and petrologic type [3]. References: [1] Robert F. and Epstein S. (1982) GCA, 46, 81-95. [2] Yang J. and Epstein S. (1984) Nature, 311, 544-547. [3] Clemett S. J. et al. (1992) LPS XXIII, 233-234. Cronin J. R.* Pizzarello S. Enantiomeric Analyses of Chiral Compounds from the Murchison Meteorite
Channel: Education
Uploaded: November 30, 1999 at 12:00 am
Author: h4ck3rm1k3
Length: 01:24
Rating: N/A
Views: 10
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