Sample Petrographic Description
Sample Number | RBT 03522 |
Newsletter | 28,1 |
Location | Roberts Massif |
Field Number | 15348 |
Dimensions (cm) | 6.0 x 5.5 x 4.0 |
Weight (g) | 282.40 |
Original Classification | CK5 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 27-30;Ferrosilite (mol%): 28 | |
Weathering | |
B | |
Fracturing | |
A | |
Macroscopic Description - Kathleen McBride | |
Small patches of brown/black fusion crust are visible on the exterior. The exposed interior is dark gray, with a rough texture and patches of white evaporites. The interior is steel gray matrix with mm sized gray chondrules. This carbonaceous chondrite is hard. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy | |
The section consists of relict chondrules up to 2 mm in a matrix of finer-grained silicates, sulfides and magnetite. Weathering is minor, but shock-blackening is extensive. Silicates are homogeneous. Olivine is Fa27-30 and orthopyroxene is Fs28. The meteorite is a CK5 chondrite. |
Antarctic Meteorite Images for Sample RBT 03522 | ||||
Lab Photo(s) : | ||||
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Antarctic Meteorite Images for Sample RBT 03522 | ||||
Thin Section Photo(s) : | ||||
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References for Sample RBT03522 | |
Dyar, M.D., Wallace, S.M., Burbine, T.H., and Sheldon, D.R., 2023, A machine learning classification of meteorite spectra applied to understanding asteroids. Icarus, 406, 115718, https://doi.org/10.1016/j.icarus.2023.115718. | |
Bloom, H., Lodders, K., Chen, H., Zhao, C., Tian, Z., Koefoed, P., Petö, M.K., Jiang, J., and Wang, K., 2020, Potassium isotope compositions of carbonaceous and ordinary chondrites: Implications on the origin of volatile depletion in the early solar system. Geochimica et Cosmochimica Acta, 277, 111–131. | |
Noronha, B. A., Friedrich, J. M., 2014, Chemical compositions and classifica tion of five thermally altered carbonaceous chondrites. Meteoritics & Planetary Science, 49, 1494-1504. | |
Wasson, J. T., Isa, J., Rubin, A. E., 2013, Compositional and petrographic similarities of CV and CK chondrites: A single group with variations in textures and volatile concentrations attributable to impact heating, crushing and oxidation. Geochimica et Cosmochimica Acta, 108, 1-May-13, 45-62, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2013.01.011. | |
Kubuki, S., Iwanuma, J., Akiyama, K., Isa, M., Shirai, N., Ebihara, M., and Nishida, T., 2012, Reclassification of CK chondrites confirmed by elemental analysis and Fe-Mössbauer spectroscopy, Hyperfine Interactions, 208, 75-78, DOI 10.1007/s10751-011-0427-0. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |