Sample Petrographic Description
Sample Number | GRO 95596 |
Newsletter | 21,1 |
Location | Grosvenor Mountains |
Field Number | 7615 |
Dimensions (cm) | 2.5 x 2.0 x 1.5 |
Weight (g) | 12.69 |
Original Classification | LL3.8 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 9-29;Ferrosilite (mol%): 3-20 | |
Weathering | |
A/B | |
Fracturing | |
A | |
Macroscopic Description - Kathleen McBride | |
This ordinary chondrite has shiny brown/black fusion crust, with a rough texture. The interior has a white matrix with an oxidation rind. Metal grains and dark gray crystalline clasts are visible. Chondrules are dark gray in color. | |
Thin Section Description (,2) - Brian Mason | |
The section shows a closed-packed aggregate of chondrules and chondrule fragments (up to 2.4 mm across) in a dark matrix containing a small amount of nickel-iron and troilite. Weathering is minor, with some brown limonitic staining throughout the section. Microprobe analyses show olivine and pyroxene of variable composition; olivine, Fa9-29, mean Fa24; pyroxene, Fs3-20. The meteorite is classified as an LL3 chondrite (estimated LL3.8). |
Antarctic Meteorite Images for Sample GRO 95596 | ||||
Thin Section Photo(s) : | ||||
References for Sample GRO95596 | |
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. | |
Wang, M. S., Lipschutz, M. E., 2007, Trace elements in primitive meteorites-VII Antarctic unequilibrated ordinary chondrites. Geochimica et Cosmochimica Acta, 71 Issue 4, 15-Feb-07, 1062-1073, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2006.10.009. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |