Sample Petrographic Description
Sample Number | LAR 04382 |
Newsletter | 30,2 |
Location | Larkman Nunatak |
Field Number | 15597 |
Dimensions (cm) | 4.5 x 1.75 x 3.0 |
Weight (g) | 43.66 |
Original Classification | H3 Chondrite |
Updated Classification | H3.4 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 6-30;Ferrosilite (mol%): 1-13 | |
Weathering | |
B | |
Fracturing | |
A | |
Macroscopic Description - Kathleen McBride | |
95% of the exterior is covered with dull brown/black fusion crust. The interior is a black matrix with numerous chondrules of various sizes and colors. This meteorite is hard. | |
Thin Section Description (,2) - Tim McCoy, Lauren LaCroix, Linda Welzenbach | |
The section exhibits numerous small, well-defined chondrules (up to 1.2 mm) in a black matrix of fine-grained silicates, metal and troilite. Weak shock effects and weathering are present. Silicates are unequilibrated; olivines range from Fa6-30 and pyroxenes from Fs1-13. The meteorite is an H3 chondrite (estimated subtype 3.4). | |
Reclassification Notes (AMN 30,2) | |
Classification updated to H3.4. |
Antarctic Meteorite Images for Sample LAR 04382 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample LAR 04382 | ||||
Thin Section Photo(s) : | ||||
References for Sample LAR04382 | |
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. | |
Vernazza, P., and M. Lockhart , B. Zanda, R. P. Binzel, T. Hiroi, F. E. DeMeo, M. Birlan, R. Hewins, L. Ricci, P. Barge, 2014, Multiple and fast: The accretion of ordinary chondrite parent bodies. . The Astrophysical Journal , 791, 120-131, https://doi.org/10.1088/0004-637X/791/2/120. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |