McSween, Harry Y., Jr. and Stolper, Edward M. and Taylor, Lawrence A. and Muntean, Richard A. and O'Kelley, G. Davis and Eldridge, James S. and Biswas, Swarajranjan and Ngo, Hung T. and Lipschutz, Michael S. (1979) Petrogenetic relationship between Allan Hills 77005 and other achondrites. Earth and Planetary Science Letters, 45 (2). pp. 275-284. ISSN 0012-821X http://resolver.caltech.edu/CaltechAUTHORS:20120821-114725520
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Allan Hills (ALHA) 77005 is a newly discovered, unique achondrite from Antarctica. Petrologic similarities with the shergottites in terms of mineralogy, oxidation state, inferred source region composition, shock metamorphic effects and shock ages suggest a genetic relationship. Volatile to involatile element ratios (e.g. K/U, Rb/U, Cs/U, Tl/U) and abundances of other trace elements support this hypothesis. ALHA 77005 may be a cumulate that crystallized from a liquid parental to those from which the shergottites crystallized; alternatively it may be a sample of the type of source peridotite from which shergottite parent liquids were derived by partial melting. Chemical similarities with terrestrial ultramafic rocks suggest that this unique meteorite provides an additional sample of the only other solar system body known to have basalt source regions chemically similar to the upper mantle of the Earth.
|Additional Information:||© 1979 Elsevier B.V. Received 11 April 1979. Revised 18 June 1979. Available online 23 October 2002. We are grateful to NSF and NASA for acquiring and making available samples of this meteorite This work was supported in part by NASA grant NSG-7413 to H Y M, NASA grant NGL 15-005-140 to M E L, and the Division of Nuclear Sciences, Office of Basic Energy Sciences, U S Department of Energy, under contract (W-7405-eng-26) with the Union Carbide Corporation.|
|Official Citation:||Harry Y. McSween Jr., Edward M. Stolper, Lawrence A. Taylor, Richard A. Muntean, G. Davis O'Kelley, James S. Eldridge, Swarajranjan Biswas, Hung T. Ngo, Michael E. Lipschutz, Petrogenetic relationship between Allan Hills 77005 and other achondrites, Earth and Planetary Science Letters, Volume 45, Issue 2, November 1979, Pages 275-284, ISSN 0012-821X, 10.1016/0012-821X(79)90129-8. (http://www.sciencedirect.com/science/article/pii/0012821X79901298)|
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|Deposited By:||Aucoeur Ngo|
|Deposited On:||21 Aug 2012 20:06|
|Last Modified:||21 Aug 2012 20:06|
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