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Chondrules: chemical, petrographic and chronologic clues to their origin by impact

Hutchison, R.; Bridges, J.C. and Gilmour, J.D. (2005). Chondrules: chemical, petrographic and chronologic clues to their origin by impact. Astronomical Society of the Pacific Conference Series, 341 pp. 933–950.

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Abstract

Major element contents of chondrite groups were volatility controlled and established in a nebula after formation of Ca-Al-rich inclusions but before chondrules formed. Elemental abundances in chondrules tend to correlate with chemical affinity. Calcium was fractionated from Al by a planetary, not a nebular process. Chondrules were contemporaneous with igneous activity and aqueous and thermal metamorphism. Planetary bodies of varied size and structure co-existed during the first 50-80 million years of the Solar System, when chondrules formed and impact was common. We propose that most chondrules formed by impacts on differentiated bodies.

Item Type: Journal Article
Copyright Holders: 2005 by Astronomical Society of the Pacific
ISSN: 1050-3390
Extra Information: Part of the Proceedings of a workshop held 8-11 November 2004 in Kaua'i, Hawai'i
Keywords: chrondite; nebula; igneous activity
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Related URLs:
Item ID: 78
Depositing User: Users 12 not found.
Date Deposited: 21 Nov 2006
Last Modified: 14 Feb 2014 00:45
URI: http://oro.open.ac.uk/id/eprint/78
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