Antarctic Meteorite Petrographic Description

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Sample Petrographic Description

Sample Number

EET 90043

Newsletter

15,1

Location

Elephant Moraine

Field Number

7133

Dimensions (cm)

2.9 x 1.8 x 1.3

Weight (g)

12.54

Original Classification

C2 Chondrite

Updated Classification

CO3 Chondrite (Anomalous)

Mineral Composition (%Fa & %Fs)

Fayalite (mol%): 1-49;Ferrosilite (mol%): 1-9

Weathering

Fracturing

Macroscopic Description - Cecilia Satterwhite

One patch of fusion crust remains on this meteorite. The interior is black with abundant chondrules/inclusions present.

Thin Section Description (,2) - Brian Mason

The section shows numerous small chondrules, up to 0.9 mm across, and abundant small grains, mainly olivine, in a black matrix. Microprobe analyses show olivine with a wide range in composition, Fa_1-49, mean Fa₁₄ (CV FeO is 103); pyroxene, Fs_1-9. The meteorite is a C2 chondrite.

Reclassification Notes (AMN 41,1)

(Choe et al., 2010)

Antarctic Meteorite Images for Sample EET 90043

Lab Photo(s) :

Antarctic Meteorite Images for Sample EET 90043

Thin Section Photo(s) :

Thin Section Photo of Sample EET 90043 in Cross-Polarized Light

Thin Section Photo of Sample EET 90043 in Plane-Polarized Light

Thin Section Photo of Sample EET 90043 in Reflected Light

References for Sample EET90043

Krot, A. N., 2019a, Refractory inclusions in carbonaceous chondrites: Records of early solar system processes. , Meteoritics & Planetary Science, 54 , 1647-1691 .

Tonui, E., Zolensky, M. E., Hiroi, T., Nakamura, T., Lipschutz, M. E, Wang, M. S., Okudaira, K., 2014, Petrographic, chemical and spectroscopic evidence for thermal metamorphism in carbonaceous chondrites I: CI and CM chondrites. , Geochimica et Cosmochimica Acta, 126 , 1-Feb-14 , 284-306 , ISSN 0016-7037 , http://dx.doi.org/10.1016/j.gca.2013.10.053 .

Cloutis, E. A., Hudon, P., Hiroi, T., Gaffey, M. J., 2012, Spectral reflectance properties of carbonaceous chondrites 4: Aqueously altered and thermally metamorphosed meteorites. , Icarus, 220 Issue 2 , Aug-12 , 586-617 , ISSN 0019-1035 , http://dx.doi.org/10.1016/j.icarus.2012.05.018 .

Choe, W. H., Huber, H., Rubin, A. E., Kallemeyn, G. W., Wasson, J. T., 2010, Compositions and taxonomy of 15 unusual carbonaceous chondrites. , Meteoritics & Planetary Science, 45 , 531-554 , http://dx.doi.org/10.1111/j.1945-5100.2010.01039.x .

Rochette, P., Kohout, T., Pesonen, L., Quirico, E., Sagnotti, L., Skripnik, A., Gattacceca, J., Bonal, L., Bourot-Denise, M., Chevrier, V., Clerc, J. P., Consolmagno, G., Folco, L., Gounelle, M., 2008, Magnetic classification of stony meteorites: 2. Non-ordinary chondrites. , Meteoritics & Planetary Science, 43 , 959-980 , http://dx.doi.org/10.1111/j.1945-5100.2008.tb01092.x .

RELAB, , Reflectance Experiment Lab , catalogue of samples, .

Antarctic Meteorite Petrographic Description

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