Sample Petrographic Description
Sample Number | MIL 07001 |
Newsletter | 31,2 |
Location | Miller Range |
Field Number | 19101 |
Dimensions (cm) | 11.0 x 9.0 x 8.5 |
Weight (g) | 924.20 |
Original Classification | Diogenite (Olivine) |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 28;Ferrosilite (mol%): 23 | |
Weathering | |
A/B | |
Fracturing | |
A/B | |
Macroscopic Description - Roger Harrington | |
Dull black fusion crust covers 40% of this achondrite’s exterior. Approximately 40% of the exterior is a tan to medium olive green with a fine grained matrix. 20% is medium to light olive green with a coarse grained matrix. One 3 mm diameter dark mineral inclusion is present on the top north side. Cleavage planes are visible on the inclusion when viewed under a hand lens. The interior is a medium gray to orange tan fine grained matrix with less than 1% small (<1 mm) dark mineral inclusions. | |
Thin Section Description (,7) - Tim McCoy, Linda Welzenbach | |
The section is unbrecciated and is dominated by 0.5-1 mm equigranular orthopyroxene with abundant 120° triple junctions. Olivine occurs as rounded grains both interstitially to and poikilitically enclosed in the orthopyroxene. Opaques included oxides, troilite and metal. Orthopyroxene has a composition of Fs23 Wo2 and olivine is Fa28. The Fe/Mn ratio of the pyroxene is ~30. The meteorite is an olivine diogenite. | |
Oxygen Isotopic Composition - Z. Sharp, University of New Mexico | |
Oxygen isotopic analyses of two splits yielded the following results which fall in the HED meteorite field. All samples were cleaned in a 10% HCl solution for 1 minute, followed by ultrasonication. δ17O = 1.64,δ18O = 3.80, Δ17O = -0.33 |
Antarctic Meteorite Images for Sample MIL 07001 | ||||
Lab Photo(s) : | ||||
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Antarctic Meteorite Images for Sample MIL 07001 | ||||
Thin Section Photo(s) : | ||||
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References for Sample MIL07001 | |
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. | |
Bekaert, D.V., Curtice, J., Meier, M.M.M., Byrne, D.J., Broadley, M.W., Seltzer, A., Barry, P., Kurz, M.D., and Nielsen, S.G., 2022, Determining the noble gas cosmic ray exposure ages of 23 meteorites (8 chondrites and 15 achondrites) from modeling and empirical methods, Meteoritics & Planetary Science, 57:8, 1-28, doi:10.1111/maps.13887. | |
McCoy, T.J., 2015, Meteorite Misfits: Fuzzy Clues to Solar System Processes. 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. 145-152. | |
Mittlefehldt, D. W., 2015, Asteroid (4) Vesta: I. The howardite-eucrite-diogenite (HED) clan of meteorites. Chemie der Erde - Geochemistry, 75 Issue 2, Jun-15, 155-183, ISSN 0009-2819, http://dx.doi.org/10.1016/j.chemer.2014.08.002. | |
Tkalcec, B. J., Brenker, F. E., 2014, Plastic deformation of olivine-rich diogenites and implications for mantle processes on the diogenite parent body. Meteoritics & Planetary Science, 49, 1202-1213. | |
Greenwood, R. C., Barrat, J. A., Yamaguchi, A., Franchi, I. A., Scott, E. R., Bottke, W. F., Gibson, J. M., 2014, The oxygen isotope composition of diogenites: Evidence for early global melting on a single, compositionally diverse, HED parent body. Earth and Planetary Science Letters, 390, 165-174. | |
Day, J. M. D., Walker, R. J., Qin, L., Rumble III, D., 2012, Late accretion as a natural consequence of planetary growth. Nature Geoscience, 5, 614-617, http://dx.doi.org/10.1038/ngeo1527. | |
Wang, K., Moynier, F., Dauphas, N., Barrat, J. A., Craddock, P., Sio, C. K., 2012, Iron isotope fractionation in planetary crusts. Geochimica et Cosmochimica Acta, 89, 15-Jul-12, 31-45, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2012.04.050. | |
Paniello, R. C., Moynier, F., Beck, P., Barrat, J. A., Podosek, F. A., Pichat, S., 2012, Zinc isotopes in HEDs: Clues to the formation of 4-Vesta, and the unique composition of Pecora Escarpment 82502. Geochimica et Cosmochimica Acta, 86, 1-Jun-12, 76-87, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2012.01.045. | |
Barrat, J. A., Yamaguchi, A., Zanda, B., Bollinger, C., Bohn, M., 2010, Relative chronology of crust formation on asteroid Vesta: Insights from the geochemistry of diogenites. Geochimica et Cosmochimica Acta, 74 Issue 21, 1-Nov-10, 6218-6231, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2010.07.028. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |