EarthRef.org Reference Database (ERR) -- Moreira et al. 1998

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Moreira et al. 1998

Moreira, M., Kunz, J. and Allegre, C. (1998). Rare gas systematics in popping rock: Isotopic and elemental compositions in the upper mantle. Science 279(5354): 1,178-1,181.

New experimental data on the isotopic variations of neon, argon, and xenon in a popping rock imply that the Ar-40/Ar-36 ratio of the upper mantle is less than 44,000 and that the Xe-129/Xe-130 ratio is less than 8.2. The elemental abundance pattern of rare gases is chondritic-like and is quite distinct from the solar pattern. These data imply that Earth accreted from planetesimals that probably underwent a transformation of their rare gas budget from solar- to chondritic-like, leaving the isotopic composition unchanged from the solar pattern.

BACKGROUND DATA FILES

	Abstract

	Table 1
	Table 2

Keywords
mid-atlantic ridge, noble-gases, ultramafic xenoliths, basalt glasses, neon, helium, evolution, xenon, 14-degrees-n, origin

Journal
Science
http://www.sciencemag.org/

Publisher
American Association for the Advancement of Science
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