Sample Petrographic Description
Sample Number | MIL 090036 |
Newsletter | 33,2 |
Location | Miller Range |
Field Number | 20047 |
Dimensions (cm) | 9.0 x 6.5 x 3.0 |
Weight (g) | 244.83 |
Original Classification | Lunar-Anorth. Breccia |
Updated Classification | Lunar Anorthositic Regolith Breccia |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 16-47;Ferrosilite (mol%): 22-52 | |
Weathering | |
B | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
The exterior of this meteorite is smooth with no obvious fusion crust. There is a thin yellow ochre film on two surfaces, possibly weathered fusion crust. The meteorite is obviously brecciated and one face also has penetrating fractures. The interior reveals gray clasts in a matrix of dark material that has within it smaller | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy, Linda Welzenbach | |
The section consists of an extremely fine-grained matrix with isolated mineral grains and fine- to coarse-grained basaltic clasts in all size ranges up to 1 mm. Dark/opaque clasts exist in this meteorite that do not appear in MIL 090034. Microprobe analyses reveal olivine of Fa16-46, pyroxene in a wide range of compositions from pigeonite Fs19-30Wo4-7 with intermediate and more FeO-rich compositions (one pyroxene of Fs51), and plagioclase of An86-96. The Fe/Mn ratio of the pyroxene averages ~62. This meteorite is a basalt-bearing anorthositic regolith breccia. | |
Reclassification Notes (AMN 47,1) | |
Revised the name based on glassy spherules reported in matrix (i.e., regolithic) (Calzada-Diaz et al. 2017). Unpaired with other MIL 09 lunars due to composition and CRE ages (Nishiizumi and Caffee, 2013; Zeigler and Korotev, 2016). Calzada‐Diaz, A., Joy, K. H., Crawford, I. A., & Strekopytov, S. (2017) The petrology, geochemistry, and age of lunar regolith breccias Miller Range 090036 and 090070: Insights into the crustal history of the Moon. Meteoritics & Planetary Science, 52(1), 3-23. Nishiizumi, K., & Caffee, M. W. (2013) Relationships among six lunar meteorites from Miller Range, Antarctica based on cosmogenic radionuclides. In 44th Annual Lunar and Planetary Science Conference (No. 1719, p. 2715). Zeigler, R. A., & Korotev, R. L. (2016) Petrography and Geochemistry of Lunar Meteorite Miller Range 13317. In 47th Annual Lunar and Planetary Science Conference (No. 1903, p. 2554). | |
Astromaterials 3D Link(s) | |
https://ares.jsc.nasa.gov/astromaterials3d/sample-details.htm?sample=MIL090036-35 |
Antarctic Meteorite Images for Sample MIL 090036 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample MIL 090036 | ||||
Thin Section Photo(s) : | ||||
References for Sample MIL090036 | |
McIntosh, E. C., Day, J. M. D., Lui, Y., Jiskoot, C., 2020, Examining the compositions of impactors striking the Moon using Apollo impact melt coats and anorthositic regolith breccia meteorites. Geochimica et Cosmochimica Acta, 274, 192-210, doi: 10.1016/j.gca.2020.01.051. | |
Tian, Z., Jolliff, B.L., Korotev, R.L., Fegley, B., Lodders, K., Day, J.M.D., Chen, H., Wang, K., 2020, Potassium isotopic composition of the moon. Geochimica et Cosmochimica Acta, 280, 263-280, doi: 10.1016/j.gca.2020.04.021. | |
Calzada-Diaz, A., Joy, K. H., Crawford, I. A., & Strekopytov, S. , 2017, The petrology, geochemistry, and age of lunar regolith breccias Miller Range 090036 and 090070: Insights into the crustal history of the Moon. . Meteoritics & Planetary Science, 52, 3-23, doi: 10.1111/maps.12737. | |
Korotev, R.L., and Zeigler, R.A., 2015, ANSMET Meteorites from the Moon. 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. 101-130. |