TY - JOUR
T1 - Nanosized carbon-rich grains in carbonaceous chondrite meteorites
AU - Garvie, Laurence
AU - Buseck, P R
N1 - Funding Information:
We thank John Cronin, Gary Huss, Dante Lauretta, and Tom Zega for their useful discussions and comments, and Adrian Brealy and Joseph V. Smith for reviewing the manuscript. This research was supported by funding from NASA (NAG5-9352) and NSF (EAR-0113345). We thank the Center for Meteorite Studies at ASU for samples of Bells, Cold Bokkeveld, Murray, and Murchison; USNM for Mighei; and Sandra Pizzarello for the small fragments of pristine Tagish Lake meteorite. [KF]
PY - 2004/8/15
Y1 - 2004/8/15
N2 - Macromolecular carbonaceous material is common in primitive meteorites. Little information exists on its form and composition, and there are no published data on nanometer-scale chemical and structural variations. Transmission electron microscopy (TEM) studies of CM meteorites reveal abundant, previously unrecognized nanosized carbonaceous grains. They have a high aromatic component as revealed by electron energy-loss spectroscopy (EELS), with up to 20 at.% substituted by S, N, and O. They occur as discrete hollow and solid nanospheres and sparse nanotubes. The grains exhibit considerable variations in composition, size, morphology, and abundance among meteorites and may represent materials from multiple reservoirs.
AB - Macromolecular carbonaceous material is common in primitive meteorites. Little information exists on its form and composition, and there are no published data on nanometer-scale chemical and structural variations. Transmission electron microscopy (TEM) studies of CM meteorites reveal abundant, previously unrecognized nanosized carbonaceous grains. They have a high aromatic component as revealed by electron energy-loss spectroscopy (EELS), with up to 20 at.% substituted by S, N, and O. They occur as discrete hollow and solid nanospheres and sparse nanotubes. The grains exhibit considerable variations in composition, size, morphology, and abundance among meteorites and may represent materials from multiple reservoirs.
KW - Carbonaceous chondrites
KW - Carbonaceous material
KW - EELS
KW - Nanometer-scale variations
KW - TEM
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U2 - 10.1016/j.epsl.2004.05.024
DO - 10.1016/j.epsl.2004.05.024
M3 - Article
AN - SCOPUS:4143082580
SN - 0012-821X
VL - 224
SP - 431
EP - 439
JO - Earth and Planetary Science Letters
JF - Earth and Planetary Science Letters
IS - 3-4
ER -