In situ Discovery of Graphite with Interstellar Isotopic Signatures in a Chondrule-Free Clast in an L3 Chondrite

Optical and scanning electron microscopy of a chondrule-free clast in the unequilibrated L3 chondrite Khohar revealed a spherical object consisting of an aggregate of small (∼2-micrometer diameter), Ni-poor (0.5 to 2.89 weight percent) metal particles and fine-grained graphite (

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1998-05, Vol.280 (5368), p.1418-1420
Main Authors: Mostefaoui, S., Hoppe, P., El Goresy, A.
Format: Article
Language:English
Subjects:
Carbonaceous chondrites
Chemical composition
Chondrites
Chondrites (Meteorites)
Composite particles
Cosmochemistry. Extraterrestrial geology
Earth sciences
Earth, ocean, space
Exact sciences and technology
Graphite
In situ hybridization
Isotope geochemistry
Isotope geochemistry. Geochronology
Kamacite
Metal particles
Meteorites. Tectites. Impactites
Observations
Shock waves
Signatures
Solar systems
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Description
Summary:Optical and scanning electron microscopy of a chondrule-free clast in the unequilibrated L3 chondrite Khohar revealed a spherical object consisting of an aggregate of small (∼2-micrometer diameter), Ni-poor (0.5 to 2.89 weight percent) metal particles and fine-grained graphite (
ISSN:0036-8075
1095-9203
DOI:10.1126/science.280.5368.1418