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'Domestic' origin of opaque assemblages in refractory inclusions in meteorites

Blum, Joel D. and Wasserburg, G. J. and Hutcheon, Ian D. and Beckett, John R. and Stolper, Edward M. (1988) 'Domestic' origin of opaque assemblages in refractory inclusions in meteorites. Nature, 331 . pp. 405-409. ISSN 0028-0836.

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Experimental studies indicate that opaque assemblages rich in refractory siderophile elements were formed within host calcium- and aluminium-rich inclusions (CAIs) by exsolution, oxidation and sulphidization of homogeneous alloys, rather than by aggregation of materials in the solar nebula before the formation of CAIs. These opaque assemblages are thus not the oldest known solid materials, as was once thought, and they do not constrain processes in the early solar nebula before CAI formation. Instead, the assemblages record the changing oxygen fugacity experienced by CAIs during slow cooling in nebular and/or planetary environments.

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Additional Information:© 1988 Nature Publishing Group. Received 19 October, accepted 24 December 1987. We acknowledge the careful analytical and petrographic studies of "Fremdlinge" by J. T. Armstrong and A. El Goresy which set the framework for this study. We thank G. R. Rossman for making his laboratory available to us and H. Palme, K. Keil and the U. S. Museum of Natural History for loaning us the meteorite specimens used in this study, and H. Palme for careful review. Funding was provided by grants from NASA and NSF, and by Caltech's Caroline Dobbins Fellowship to J.D.B., G.J.W. and I.D.H. are the Lunatic Asylum of the Charles Arms Laboratory (No. 4537/591)
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Caltech Caroline Dobbings Fellowship UNSPECIFIED
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Caltech Charles Arms Laboratory 4537
Lunatic Asylum Lab591
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Official Citation:'Domestic' origin of opaque assemblages in refractory inclusions in meteorites 405 Joel D. Blum, G.J. Wasserburg, Ian D. Hutcheon, John R. Beckett & Edward M. Stolper doi:10.1038/331405a0
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33503
Deposited By: Ruth Sustaita
Deposited On:24 Aug 2012 17:11
Last Modified:29 Oct 2013 16:51

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