Sample Petrographic Description
Sample Number | EET 96328 |
Newsletter | 21,2 |
Location | Elephant Moraine |
Field Number | 10644 |
Dimensions (cm) | 2.5 x 1.5 x 1.0 |
Weight (g) | 7.11 |
Original Classification | Ureilite |
Pairing | EET 87511; EET 87523; EET 87717; EET 96262; EET 96322; EET 96328; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 12-15;Ferrosilite (mol%): 13 | |
Weathering | |
B | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
The exterior has very small patches of rough vesicular black fusion crust. The interior is medium gray matrix containing dark gray to black inclusions with some minor rust and a sugary texture. | |
Thin Section Description (,2) - Tim McCoy | |
The sections consist of an aggregate of olivine (up to 1.5 mm) and orthopyroxene (up to 2.5 mm) grains. Carbonaceous material and traces of Fe, Ni metal bound the olivine grains. The meteorite is only very lightly weathered. Undulatory extinction is common. Olivine has cores of Fa15 with rims reduced to Fa12. Pyroxene is Fs13Wo3. The meteorites are ureilites. | |
Notes | |
This sample is paired with EET 87511 in 2020 by K. Righter based on field locations, textural similarities, and olivine minor and major element compositions (Goodrich, 2001, LPSC abstract, #1300; Downes et al., 2008, Geochim. Cosmochim. Acta 72(19), 4825-4844). |
Antarctic Meteorite Images for Sample EET 96328 | ||||
Thin Section Photo(s) : | ||||
References for Sample EET96328 | |
Goodrich, C. A., Harlow, G. E., Van Orman, J. A., Sutton, S. R., Jercinovic, M. J., Mikouchi, T., 2014, Petrology of chromite in ureilites: Deconvolution of primary oxidation states and secondary reduction processes. Geochimica et Cosmochimica Acta, 135, 15-Jun-14, 126-169, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2014.02.028. | |
Goodrich, C. A., Sutton, S. R., Wirick, S., Jercinovic, M. J., 2013, Chromium valences in ureilite olivine and implications for ureilite petrogenesis. Geochimica et Cosmochimica Acta, 122, 1-Dec-13, 280-305, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2013.08.003. | |
Goodrich, C. A., Ash, R. D., Van Orman, J. A., Domanik, K., McDonough, W. F., 2013, Metallic phases and siderophile elements in main group ureilites: Implications for ureilite petrogenesis. Geochimica et Cosmochimica Acta, 112, 1-Jul-13, 340-373, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2012.06.022. | |
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. |