Sample Petrographic Description
Sample Number | GRO 06059 |
Newsletter | 31,1 |
Location | Grosvenor Mountains |
Field Number | 19430 |
Dimensions (cm) | 7.0 x 6.5 x 5.0 |
Weight (g) | 433.50 |
Original Classification | Eucrite (Brecciated) |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 29-58 | |
Weathering | |
A | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
90% of the exterior has shiny, black fusion crust with thin 'ripples'. The interior is a light gray matrix with gray, black, and white angular clasts. A few rust halos are visible. | |
Thin Section Description (,2) - Tim McCoy, Cari Corrigan, Linda Welzenbach | |
This meteorite is dominated by fine-grained basaltic material which occurs as both the host and clasts. Occasional coarser-grained clasts, with grain sizes up to 2 mm, are observed. Pyroxene exhibits a range of compositions from orthopyroxene of Fs58Wo3 to augite of Fs29Wo41. Single pyroxene grains often exhibit lamellae of orthopyroxene and augite. Plagioclase is An90Or0.5. The Fe/Mn ratio of the pyroxene is ~30. The meteorite is a brecciated eucrite. |
Antarctic Meteorite Images for Sample GRO 06059 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample GRO 06059 | ||||
Thin Section Photo(s) : | ||||
References for Sample GRO06059 | |
Dhaliwal, J.K., Day, J.M., and Tait, K.T., 2023, Pristinity and petrogenesis of eucrite, Meteoritics & Planetary Science, 58, 275-295, doi: 10.1111/maps.13945. | |
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. | |
Harvey, R.P., Schutt, J., and Karner, J., 2015, Fieldwork Methods of the U.S. Antarctic Search for Meteorites Program. In Righter, K., Corrigan, C.M., McCoy, T.J., and Harvey, R.P. Meteorites: A Pictorial Guide to the Collection, First Edition, AGU Wiley, pp. 23-41. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |