Sample Petrographic Description
Sample Number | MIL 05076 |
Newsletter | 30,1 |
Location | Miller Range |
Field Number | 18155 |
Dimensions (cm) | 4.0 x 3.0 x 2.0 |
Weight (g) | 59.52 |
Original Classification | L3 Chondrite |
Updated Classification | L3.5 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 3-33;Ferrosilite (mol%): 5-31 | |
Weathering | |
B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
100% of the exterior surface has smooth brown/black pitted fusion crust. The interior is dark brown to black matrix with small light colored chondrules. | |
Thin Section Description (,2) - Tim McCoy, Valerie Reynolds | |
The section exhibits numerous well-defined chondrules (up to 1.5 mm) in a black matrix of fine-grained silicates, metal and troilite. Weak shock effects are present. Polysynthetically twinned pyroxene is present. The meteorite is moderately weathered. Silicates are unequilibrated; olivines range from Fa3-33 and pyroxenes from Fs5-31. The meteorite is an L3 chondrite (estimated subtype 3.5). | |
Reclassification Notes (AMN 30,1) | |
Classification updated to L3.5, as announced in AMN vol. 30, no. 1. |
Antarctic Meteorite Images for Sample MIL 05076 | ||||
Lab Photo(s) : | ||||
References for Sample MIL05076 | |
Eschrig, J., Bonal, L., Mahlke, M., Carry,B., Beck, P., Gattacceca, J., 2022, Investigating S-type asteroid surfaces through reflectance spectra of ordinary chondrites, Icarus, 381. | |
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. | |
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. |