Sample Petrographic Description
Sample Number | LAP 10014 |
Newsletter | 38,1 |
Location | LaPaz Ice Field |
Field Number | 22331 |
Dimensions (cm) | 12.0 x 12.0 x 7.0 |
Weight (g) | 1488.90 |
Original Classification | EL6 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 0-1 | |
Weathering | |
B | |
Fracturing | |
A/B | |
Macroscopic Description - Cecilia Satterwhite | |
Half of the exterior is covered with black/brown fusion crust and heavy oxidation. Some areas are rusty and evaporites are present. The interior is a dark gray to black matrix with metal and some oxidation. This meteorite was very difficult to break. | |
Thin Section Description (,4) - Cari Corrigan, Tim McCoy | |
This meteorite consists largely of prismatic or granular enstatite (grain size 0.1-0.2 mm) and nickel-iron, and minor amounts of sulfide and plagioclase. Only vague traces of chondritic structure are visible in this section. One end of the section exhibits a metal grain (8 x 3 mm) that is dominantly composed of iron nickel metal with rounded troilite-daubreelite inclusions up to 700 microns across, and lathes of graphite up to 1 mm in length. A single grain of sinoite was also observed in the section. Microprobe analyses show that the enstatite is almost pure MgSiO3 (Fs0.1-0.4). The meteorite is an EL6 chondrite. |
Antarctic Meteorite Images for Sample LAP 10014 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample LAP 10014 | ||||
Thin Section Photo(s) : | ||||
References for Sample LAP10014 | |
Barrat, J.-A., Bischoff, A., and Zanda, B., 2023, Trace element redistributions during metamorphism of E-chondrites: Implications for reduced bodies and the Earth, Geochimica et Cosmochimica Acta, 356, 51-65, https://doi.org/10.1016/j.gca.2023.07.003. | |
Dyar, M.D., Wallace, S.M., Burbine, T.H., and Sheldon, D.R., 2023, A machine learning classification of meteorite spectra applied to understanding asteroids. Icarus, 406, 115718, https://doi.org/10.1016/j.icarus.2023.115718. | |
Render, J., Brennecka, G.A., Burkhardt, C., and Kleine, T., 2022, Solar System evolution and terrestrial planet accretion determined by Zr isotopic signatures of meteorites, Earth and Planetary Science Letters, 595, doi: 10.1016/j.epsl.2022.117748. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |