Sample Petrographic Description
Sample Number | QUE 86900 |
Newsletter | 10,2 |
Location | Queen Alexandra Range |
Field Number | 3050 |
Dimensions (cm) | 13.0 x 10.0 x 6.5 |
Weight (g) | 1532.30 |
Original Classification | Mesosiderite |
Pairing | QUE 86900; QUE 93001; QUE 93002; QUE 93126; QUE 93150; QUE 93517; QUE 93575; QUE 93584; QUE 93586; QUE 94614; QUE 94639; |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 21-64 | |
Weathering | |
C | |
Fracturing | |
A | |
Macroscopic Description - Roberta Score | |
QUE86900 has an overall color of red-brown. Dull black fusion crust appears as isolated blebs and covers about 10% of the meteorite. Large green platy pyroxene crystals are abundant, the largest is 1.5 cm in the longest dimension. Shallow regmaglypts are present on most exterior surfaces. One exterior fracture surface has blebs of fusion crust on it. Cleaving the specimen, which was easily accomplished, revealed an interior that has numerous platy inclusions and dark rounded inclusions in a highly weathered, pliable red-brown metal-rich matrix. | |
Thin Section Description (,5) - Brian Mason | |
The section shows plagioclase and pyroxene clasts, up to 1.5 mm across, in an opaque matrix of nickel-iron and troilite (the nickel-iron extensively weathered to limonite). Most of the pyroxene is hypersthene, but some pigeonite is present; composition ranges are Wo1-11, En31-78, Fs21-64, with a mean of Wo3Fs33. Most plagioclase compositions are in the range An90-96, but a few more sodic grains were analysed. The meteorite is a mesosiderite. |
Antarctic Meteorite Images for Sample QUE 86900 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample QUE 86900 | ||||
Thin Section Photo(s) : | ||||
References for Sample QUE86900 | |
Bogard, D. D., 2011, K-Ar ages of meteorites: Clues to parent-body thermal histories. Chemie der Erde - Geochemistry, 71 Issue 3, Aug-11, 207-226, ISSN 0009-2819, http://dx.doi.org/10.1016/j.chemer.2011.03.001. | |
Schultz, L., Franke, L., 2004, Helium, neon, and argon in meteorites: A data collection. Meteoritics & Planetary Science, 39, 1889-1890, http://dx.doi.org/10.1111/j.1945-5100.2004.tb00083.x. | |
Garrison, D., Hamlin, S., Bogard, D., 2000, Chlorine abundances in meteorites. Meteoritics & Planetary Science, 35, 419-429. | |
Marvin, U. B., MacPherson, G. J., 1992, Field and Laboratory Investigations of Antarctica Meteorites Collected by United States Expeditions, Smithsonian Contributions to the Earth Sciences Number, 30, 116. | |
Sears, D. W. G., Benoit, P. H., Sears, H., Batchelor, J. D., Symes, S., 1991, The natural thermoluminescence of meteorites: III. lunar and basaltic meteorites. Geochimica et Cosmochimica Acta, 55 Issue 11, Nov-91, 3167-3180, ISSN 0016-7037, http://dx.doi.org/10.1016/0016-7037(91)90481-J. | |
Bogard, D. D., Garrison, D. H., Jordan, A. L., Mittlefehldt, D., 1990, 39Ar-40Ar dating of mesosiderites: Evidence for major parent body disruption < 4 Ga ago. Geochimica et Cosmochimica Acta, 54 Issue 9, Sep-90, 2549-2564, ISSN 0016-7037, http://dx.doi.org/10.1016/0016-7037(90)90241-C. | |
Mittlefehldt, D. W., 1990, Petrogenesis of mesosiderites: I. origin of mafic lithologies and comparison with basaltic achondrites. Geochimica et Cosmochimica Acta, 54 Issue 4, Apr-90, 1165-1173, ISSN 0016-7037, http://dx.doi.org/10.1016/0016-7037(90)90447-S. |