Evidence that polycyclic aromatic hydrocarbons in two carbonaceous chondrites predate parent-body formation

Autor:	Richard N. Zare, Jamie E. Elsila, Fiona L. Plows, Peter R. Buseck
Rok vydání:	2003
Předmět:	Murchison meteorite chemistry.chemical_compound Allende meteorite Meteorite Geochemistry and Petrology Chondrite Chemistry Environmental chemistry Mass spectrometry Parent body Cosmochemistry Astrobiology Naphthalene
Zdroj:	Geochimica et Cosmochimica Acta. 67:1429-1436
ISSN:	0016-7037
DOI:	10.1016/s0016-7037(02)01277-2
Popis:	Organic material in meteorites provides insight into the cosmochemistry of the early solar system. The distribution of polycyclic aromatic hydrocarbons (PAHs) in the Allende and Murchison carbonaceous chondrites was investigated by use of a technique called microprobe laser-desorption laser-ionization mass spectrometry, which permits spatial resolution with approximately a 40-μm spot size. Sharp chemical gradients of PAHs are associated with specific meteorite features. The ratios of various PAH intensities relative to the smallest PAH, naphthalene, are nearly constant across the sample. These findings suggest a common origin for PAHs dating before or during the formation of the parent body, consistent with proposed interstellar formation mechanisms.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3387dbb09445d6abca8ef4e09e408c27 https://doi.org/10.1016/s0016-7037(02)01277-2 Zobrazit plný text záznamu Full Text from ScienceDirect