Sample Petrographic Description
Sample Number | GRO 17098 |
Newsletter | 41,2 |
Location | Grosvenor Mountains |
Field Number | 25637 |
Dimensions (cm) | 3.4 x 2.7 x 2.5 |
Weight (g) | 38.75 |
Original Classification | Eucrite (Unbrecciated) |
Pairing | GRO 17070; GRO 17098; GRO 17200; GRO 17210; |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 24-60 | |
Weathering | |
A/B | |
Fracturing | |
A/B | |
Macroscopic Description - Cecilia Satterwhite, Rachel Funk | |
The exterior is 65% covered with black fusion crust. The exposed surface is gray with lighter gray elongated grains. The meteorite is pitted. The fresh surface a gray matrix with lighter gray elongated grains. There are minor amounts of brown rust.Similar to GRO 17070, 17210 and 17200. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy | |
The sections are dominated by coarse grained basaltic material which is unbrecciated and heavily shocked. Mineral compositions are homogeneous with orthopyroxene (Fs61Wo2-5), augite (Fs25Wo44), and plagioclase (An80-88Or1-4). The Fe/Mn ratio of the pyroxene is ~33. The paired meteorites are coarse-grained, shocked, unbrecciated eucrites. |
Antarctic Meteorite Images for Sample GRO 17098 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample GRO 17098 | ||||
Thin Section Photo(s) : | ||||
References for Sample GRO17098 | |
Mittlefehldt, D.W., Greenwood, R.C., Berger, E.L., Le, L., Peng, Z.X., and Ross, D.K., 2022, Eucrite-type achondrites: Petrology and oxygen isotope compositions, Meteoritics & Planetary Science, 57, 484-526, doi:10.1111/maps.13730. |