Sample Petrographic Description
Sample Number | DOM 03238 |
Newsletter | 28,2 |
Location | Dominion Range |
Field Number | 14904 |
Dimensions (cm) | 4.0 x 3.5 x 3.0 |
Weight (g) | 54.25 |
Original Classification | CO3 Chondrite |
Updated Classification | CO3.05 Chondrite |
Pairing | DOM 08004; DOM 03238; DOM 08139; DOM 08351; DOM 10101; DOM 10104; DOM 14019; DOM 14127; DOM 14305; DOM 18019; DOM 18069; DOM 19049; DOM 19068; DOM 19099; DOM 19170; DOM 19179; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-55;Ferrosilite (mol%): 1 | |
Weathering | |
B | |
Fracturing | |
A | |
Macroscopic Description - Kathleen McBride | |
Exterior is completely covered with dull black fusion crust with polygonal fractures. The interior is mostly rusty with high metal and light colored chondrules stained with rust. | |
Thin Section Description (,2) - Tim McCoy | |
The section consists of abundant small (up to 1 mm) chondrules, chondrule fragments and mineral grains in a dark matrix. Metal and sulfide occur within and rimming the chondrules. Olivine ranges in composition from Fa1-55, with a continuous range of intermediate compositions and a slight peak at Fa0-2. A single pyroxene is Fs1. The meteorite is a CO3 chondrite, probably of relatively low petrologic type. | |
Reclassification Notes (AMN 47,1) | |
DOM 03238 was recovered in the 2003-04 ANSMET season and initially classified as having anomalous properties. Since then, many new CO3 have been recovered and found in the Dominion Range. Comparison of DOM 03238 to many of these samples reveals that it has the same CRE age, Type II chondrule olivine Cr2O3 contents, and H, C, and N elemental and isotopic compositions. Initially thought to have a high magnetite component, its mode is only slightly higher than that measured in a number of DOM 08004 pairing group CO3s (Rubin and Li, 2019). Given all this new information, we reclassify DOM 03238 as a CO3, and add it to the DOM 08004 pairing group. Data supporting this new pairing update for DOM CO3 chondrites were presented in Righter et al. (2021, 2022, 2023) and Rubin and Li (2019). Based on Type II (FeO-rich) chondrule olivine Cr content, this sample has been reclassified to CO3.05 chondrite. Details are reported in Righter, K. et al. (2024) Pairing relations within CO3 chondrites recovered at the Dominion Range and Miller Range, Transantarctic mountains: Constraints from chondrule olivines, noble gas, and H, C, N bulk and isotopic compositions. Meteoritics and Planetary Science 59; https://doi.org/10.1111/maps.14146. |
Antarctic Meteorite Images for Sample DOM 03238 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample DOM 03238 | ||||
Thin Section Photo(s) : | ||||
References for Sample DOM03238 | |
Alexander, C.M.O'D., Wynn, J.G., and Bowden, R., 2022, Sulfur abundances and isotopic compositions in bulk carbonaceous chondrites and insoluble organic material: Clues to elemental and isotopic fractions of volatile chalcophiles, Meteoritics & Planetary Science, 57, 334-351, doi:10.1111/maps.13746. | |
Eschrig, J., Bonal, L., Beck, P., Prestgard, T.J., 2021, Spectral reflectance analysis of type 3 carbonaceous chondrites and search for their asteroidal parent bodies. Icarus, 354, 114034, https://doi.org/10.1016/j.icarus.2020.114034. | |
Prestgard, T., Bonal, L., Eschrig, J., Gattacceca, J., Sonzogni, C., and Beck, P., 2021, Miller Range 07687 and its place within the CM-CO clan. Meteoritics & Planetary Science, 56, 1758–1783, doi: 10.1111/maps.13736. | |
Davidson, J., Alexander, C. M. D., Stroud, R. M., Busemann, H., & Nittler, L. R., 2019, Mineralogy and petrology of Dominion Range 08006: A very primitive CO3 carbonaceous chondrite. Geochimica et Cosmochimica Acta, 265, 259-278. | |
Rubin, A.E. , and Li, Y., 2019, Formation and destruction of magnetite in CO3 chondrites and other chondrite groups. Geochemistry, 79, 125528, https://doi.org/10.1016/j.chemer.2019.07.009. | |
Alexander, C. O. D., Greenwood, R. C., Bowden, R., Gibson, J. M., Howard, K. T., & Franchi, I. A. , 2018, A multi-technique search for the most primitive CO chondrites. Geochimica et Cosmochimica Acta, 221, 406-420, https://doi.org/10.1016/j.gca.2017.04.021. | |
Rubin, A. E., & Ma, C. , 2017, Meteoritic minerals and their origins. . Chemie der Erde-Geochemistry, 77, 325-385, http://dx.doi.org/10.1016/j.chemer.2017.01.005. | |
Bonal, L., Quirico, E., Flandinet, L., Montagnac, G., 2016, Thermal history of type 3 chondrites from the Antarctic meteorite collection determined by Raman spectroscopy of their polyaromatic carbonaceous matter. Geochimica et Cosmochimica Acta, 189, 312-337. | |
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. |