Sample Petrographic Description
Sample Number | EET 96001 |
Newsletter | 21,1 |
Location | Elephant Moraine |
Field Number | 10123 |
Dimensions (cm) | 2.0 x 1.5 x 1.0 |
Weight (g) | 5.79 |
Original Classification | Ureilite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 16-25 | |
Weathering | |
B | |
Fracturing | |
A | |
Macroscopic Description - Kathleen McBride | |
This meteorite has a smooth black fusion crust which covers ~50% of the exterior surface area. The material underlying the fusion crust that is exposed reveals a greenish colored matrix and is very fine grained. It also contains very small white-cream colored inclusions. These inclusions are <1 mm in diameter. The interior of this achondrite is rather non-descript. It is black in color and very fine grained with very few inclusions that are < 1 mm in diameter. | |
Thin Section Description (,3) - Brian Mason | |
The section shows a microbreccia of olivine clasts (up to 1.2 mm across) with a little plagioclase and polysynthetically twinned pyroxene in a black matrix. Traces of nickel-iron and troilite are present along grain boundaries. The meteorite appears to be unweathered. Microprobe analyses show olivine of variable compositions: Fa16-25, mean Fa20. One grain of plagioclase, An36, was analyzed. The meteorite is classified as a ureilite. |
Antarctic Meteorite Images for Sample EET 96001 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample EET 96001 | ||||
Thin Section Photo(s) : | ||||
References for Sample EET96001 | |
Warren, P. H., Huber, H., Ulff-Møller, F., 2006, Alkali-feldspathic material entrained in Fe,S-rich veins in a monomict ureilite. Meteoritics & Planetary Science, 41, 797-813, http://dx.doi.org/10.1111/j.1945-5100.2006.tb00993.x. | |
Rubin, A. E., 2006, Shock, post-shock annealing, and post-annealing shock in ureilites. Meteoritics & Planetary Science, 41, 125-133, http://dx.doi.org/10.1111/j.1945-5100.2006.tb00197.x. | |
Warren, P. H., Ulff-Møller, F., Huber, H., Kallemeyn, G. W., 2006, Siderophile geochemistry of ureilites: A record of early stages of planetesimal core formation. Geochimica et Cosmochimica Acta, 70 Issue 8, 15-Apr-06, 2104-2126, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2005.12.026. | |
Goodrich, C. A, Scott, E. R. D., Fioretti, A. M., 2004, Ureilitic breccias: clues to the petrologic structure and impact disruption of the ureilite parent asteroid. Chemie der Erde - Geochemistry, 64 Issue 4, 8-Nov-04, 283-327, ISSN 0009-2819, http://dx.doi.org/10.1016/j.chemer.2004.08.001. | |
Cohen, B. A., Goodrich, C. A., Keil, K., 2004, Feldspathic clast populations in polymict ureilites: Stalking the missing basalts from the ureilite parent body. Geochimica et Cosmochimica Acta, 68 Issue 20, 15-Oct-04, 4249-4266, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2004.01.027. |