Organic Globules with Anomalous Nitrogen Isotopic Compositions in the Tagish Lake Meteorite: Products of Primitive Organic ReactionsInterstellar grains in molecular clouds consist primarily of silicate minerals, organic material, and ices. These interstellar materials are heated and partially evaporated during the birth of the protosolar nebula, and the remaining core-mantle grains grow into large aggregates by collision and subsequent sticking to become planetesimals. The chemical diversity of meteoritic material such as chondrules, Ca-Al rich inclusions and amoeboid-olivine aggregates reflects the material distribution in the late stage of the disk evolution before planetesimal formation began. Organic matter in carbonaceous chondrites should also be considered as a sensitive probe for the extent and timing of high temperature processes in the solar nebula. Current models suggest that many of the organic molecules found in the hydrated carbonaceous chondrite meteorites were synthesized by aqueous processing of a suite of precursor molecules, some of which were interstellar with significant isotopic anomalies, such as excesses of deuterium (D), and 15N.
Document ID
20050162221
Acquisition Source
Headquarters
Document Type
Conference Paper
Authors
Nakamura, K. (NASA Johnson Space Center Houston, TX, United States)
Messenger, S. (NASA Johnson Space Center Houston, TX, United States)
Keller, L. P. (NASA Johnson Space Center Houston, TX, United States)
Flynn, G. J. (State Univ. of New York Plattsburgh, NY, United States)
Wirick, S. (State Univ. of New York Stony Brook, NY, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2004
Publication Information
Publication: Chondrites and the Protoplanetary Disk, Part 3