Wasserburg, G. J. and Sanz, H. G. and Bence, A. E. (1968) Potassium-Feldspar Phenocrysts in the Surface of Colomera, and Iron Meteorite. Science, 161 (3842). pp. 684-687. ISSN 0036-8075. http://resolver.caltech.edu/CaltechAUTHORS:20131121-075702149
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Silicate aggregates, including large single crystals of potassium feldspar as long as 11 centimeters and sodium feldspar, are embeded in the surface of the medium octahedrite Colomera. Silicate nodules in the interior appear to be much smaller (about 0.3 centimeter). Glass nodules are abundant both on the external surface and in the interior. These observations are evidence that some iron meteorites formed as segregations within a silicate matrix and did not originate in a metallic planetary core.
|Additional Information:||© 1968 American Association for the Advancement of Science. 20 May 1968. Supported by grants from NSF (GP 3570 and 7976) and NASA (NGR-05-002-044). Philip Carpenter and James Stevens (Jet Propulsion Laboratory) generously aided us in cleaning and weighing the meteorite. Valuable discussions with D. S. Burnett, A. E. Ringwood et al. be here acknowledged. We were ably assisted in the microprobe work by A. Chodos. The argon analyses, made by D. D. Bogard, will be reported elsewhere. Contribution 1534 from the Division of Geological Sciences, California Institute of Technology.|
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|Official Citation:||Potassium-Feldspar Phenocrysts in the Surface of Colomera, and Iron Meteorite Author(s): G. J. Wasserburg, H. G. Sanz and A. E. Bence Source: Science, New Series, Vol. 161, No. 3842 (Aug. 16, 1968), pp. 684-687 Stable URL: http://www.jstor.org/stable/1725836|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||21 Nov 2013 16:57|
|Last Modified:||21 Nov 2013 16:57|
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