Sample Petrographic Description
Sample Number | LAR 06318 |
Newsletter | 31,1 |
Location | Larkman Nunatak |
Field Number | 19596 |
Dimensions (cm) | 4.0 x 3.0 x 2.0 |
Weight (g) | 25.04 |
Original Classification | CM2 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 0-54;Ferrosilite (mol%): 1-4 | |
Weathering | |
A/B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
The exterior of this meteorite has 40% purplish patches of fusion crust with polygonal fractures. The interior is dark gray to black with light colored, gray to tan inclusions and chondrules. | |
Thin Section Description (,2) - Tim McCoy, Cari Corrigan, Linda Welzenbach | |
The section consists of abundant small chondrules (up to 1 mm), chondrule fragments, mineral grains and CAIs set in a black matrix; rare metal and sulfide grains are present. Olivine compositions are Fa0-54 and orthopyroxene is Fs1-4. The matrix consists dominantly of an Fe-rich serpentine. The meteorite is a CM2 chondrite. |
Antarctic Meteorite Images for Sample LAR 06318 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample LAR 06318 | ||||
Thin Section Photo(s) : | ||||
References for Sample LAR06318 | |
Hiroi, T., Ohtsuka, K., Howard, K.T., Robertson, K.R., and Milliken, R.E., Kaiden, H., Imae, N., Misawa, K., Kojima, H., Sasakia, S., Matsuokaa, M., Nakamura, T., Bish, D.L., 2021, UV-visible-infrared spectral survey of Antarctic carbonaceous chondrite chips. Polar Science, 29, 100723, https://doi.org/10.1016/j.polar.2021.100723. | |
Kaplan, H.H., Connolly, H.C., Dotto, E., Emery, J.P., Fornasier, S., Lantz, C., Lim, L.F., Merlin, F., Praet, A., Reuter, D.C., Sanford, S.A., Hamilton, V.E., Simon, A.A., Takir, D., and Lauretta, D.S., Howell, E.S., Anderson, F.S., Barrucci, M.A., Brucato, J., Burbine, T.H., Clark, B.E., Cloutis, E.A., 2020, Visible-near infrared spectral indices for mapping mineralogy and chemistry with OSIRIS-Rex. Meteoritics & Planetary Science, 55, 744-765, doi: 10.111/maps.13461. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |