Sample Petrographic Description
Sample Number | MCY 05218 |
Newsletter | 29,2 |
Location | MacKay Glacier |
Field Number | 17650 |
Dimensions (cm) | 6.5 x 6.5 x 2.5 |
Weight (g) | 214.54 |
Original Classification | H3 Chondrite |
Updated Classification | H3.6 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-21;Ferrosilite (mol%): 2-9 | |
Weathering | |
B/C | |
Fracturing | |
A/B | |
Macroscopic Description - Cecilia Satterwhite | |
98% of the exterior has black/brown fusion crust with fractures and oxidation. The interior is brown with dark gray to black areas. Abundant inclusions are visible; some are gray and white but most are weathered. | |
Thin Section Description (,2) - Tim McCoy | |
The section exhibits numerous small, well-defined chondrules (up to 1.5 mm) in a black matrix of fine-grained silicates, metal and troilite. Silicates are unequilibrated; olivines range from Fa1-21, with a weak peak at Fa19, and pyroxenes from Fs2-9. The meteorite is a H3 chondrite (estimated subtype 3.6). | |
Reclassification Notes (AMN 29,2) | |
Classification updated to H3.6. |
References for Sample MCY05218 | |
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. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |