Sample Petrographic Description
Sample Number | EET 87529 |
Newsletter | 11,2 |
Location | Elephant Moraine |
Field Number | 4179 |
Dimensions (cm) | 4.0 x 3.0 x 2.0 |
Weight (g) | 35.69 |
Original Classification | Carbonaceous C4 |
Updated Classification | CK5 Chondrite |
Pairing | EET 87507; EET 16006; EET 16029; EET 16048; EET 16049; EET 16170; EET 16172; EET 16201; EET 16203; EET 87508; EET 87514; EET 87519; EET 87525; EET 87526; EET 87527; EET 87529; EET 90001; EET 90002; EET 90003; EET 90004; EET 90005; EET 90006; EET 90007; EET 90008; EET 90009; EET 90010; EET 90013; EET 90014; EET 90015; EET 90016; EET 90017; EET 90018; EET 90022; EET 90023; EET 90025; EET 90026; EET 90027; EET 90028; EET 90035; EET 90036; EET 90038; EET 90039; EET 90040; EET 90041; EET 90042; EET 90044; EET 90045; EET 90046; EET 90048; EET 90049; EET 90050; EET 90052; EET 90234; EET 90428; EET 90991; EET 92002; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 29 | |
Weathering | |
Be | |
Fracturing | |
A | |
Macroscopic Description - René Martinez, Carol Schwarz, Roberta Score | |
All of these specimens have weathered and fractured patchy fusion crust with salt present in some cases. Interiors are fine-grained and light to dark gray. Dark inclusions, up to 1.5 mm, are plentiful. A 5 mm spherical black aphanitic inclusion was found in EET87507. | |
Thin Section Description (,4) - Brian Mason | |
The section of EET87526 shows an aggregate of small (0.01-0.02 mm) olivine grains and a little opaque material, with sparse chondrules up to 1.5 mm across. Fusion crust, 0.6 mm thick, borders part of the section. Olivine composition is Fa29; a little pyroxene, Wo1Fs24, and plagioclase, An49, are present. The opaque material is mainly magnetite with a little pentlandite. This is a C4 chondrite. The sections of EET87507 and 87529 are so similar to EET87526 in textures and mineral compositions that the meteorites can be confidently paired. EET87508, 87514, 87519, 87525, and 87527 also appear to belong to this group of C4 chondrites. These five were examined in thin section but were not analyzed by electron microprobe. | |
Reclassification Notes (AMN 17,1) | |
Re-classified to CK5 according to Kallemeyn, G. W., Rubin, A. E., Wasson, J. T., 1991, The compositional classification of chondrites: V. The Karoonda (CK) group of carbonaceous chondrites. Geochimica et Cosmochimica Acta, 55, 881-892. |
Antarctic Meteorite Images for Sample EET 87529 | ||||
Thin Section Photo(s) : | ||||
References for Sample EET87529 | |
Benoit, P. H., Sears, D. W. G., Akridge, J. M. C., Bland, P. A., Berry, F. J., Pillinger, C. T., 2000, The non-trivial problem of meteorite pairing. Meteoritics & Planetary Science, 35, 393-417. | |
Geiger, T., Bischoff, A., 1995, Formation of opaque minerals in CK chondrites. Planetary and Space Science, 43 Issues 3-4, March-April 1995, 485-498, ISSN 0032-0633, http://dx.doi.org/10.1016/0032-0633(94)00173-O. | |
Kallemeyn, G. W., Rubin, A. E., Wasson, J. T., 1991, The compositional classification of chondrites: V. The Karoonda (CK) group of carbonaceous chondrites. Geochimica et Cosmochimica Acta, 55 Issue 3, Mar-91, 881-892, ISSN 0016-7037, http://dx.doi.org/10.1016/0016-7037(91)90348-9. |