Sample Petrographic Description
| Sample Number | MIL 11207 |
| Newsletter | 35,2 |
| Location | Miller Range |
| Field Number | 21579 |
| Dimensions (cm) | 7.0 x 6.5 x 2.5 |
| Weight (g) | 247.34 |
| Original Classification | R6 Chondrite |
| Mineral Composition (%Fa & %Fs) | |
| Fayalite (mol%): 39-41;Ferrosilite (mol%): 20 | |
| Weathering | |
| Ce | |
| Fracturing | |
| B | |
| Macroscopic Description - Kathleen McBride | |
| Dark brown/black fusion crust with polygonal fractures and evaporites covers the exterior surface. The evaporites are a light blue-green to light lime green color. The interior is brownish gray in color with lighter white circular splotches shaped within a fine grained crystalline texture. | |
| Thin Section Description (,2) - Cari Corrigan, Tim McCoy | |
| Updated in newsletter AMN 36,1 The section is comprised of coarse grained (100-200 micron), equigranular olivine, sometimes poikilitically enclosed in mm-sized feldspar with sulfides, oxides and hornblende (yes, hornblende). Olivine compositions are Fa40, feldspar is An10Or4. The meteorite is an R6 chondrite with pronounced shock effects. It is petrologically distinct from the LAP 04840 pairing group, although it shares the common feature of being a hydrous phase bearing R chondrite. |
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| Antarctic Meteorite Images for Sample MIL 11207 | ||||
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| Field photo image(s) courtesy of the ANSMET (ANtarctic Search for METeorites) Program, Case Western Reserve University and the University of Utah | ||||
| Antarctic Meteorite Images for Sample MIL 11207 | ||||
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| Antarctic Meteorite Images for Sample MIL 11207 | ||||
| Thin Section Photo(s) : | ||||
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| References for Sample MIL11207 | |
| Schrader, D.L., Davidson, J., McCoy, T.J., Zega, T.J., Russell, S.S., Domanik, K.J., and King, A.J., 2021, The Fe/S ratio of pyrrhotite group sulfides in chondrites: An indicator of oxidation and implications for return samples from asteroids Ryugu and Bennu. Geochimica et Cosmochimica Acta, 303, 66–91, https://doi.org/10.1016/j.gca.2021.03.019. | |
| Rubin, A. E., & Ma, C. , 2017, Meteoritic minerals and their origins. . Chemie der Erde-Geochemistry, 77, 325-385, http://dx.doi.org/10.1016/j.chemer.2017.01.005. | |
| Schrader, D. L., Davidson, J., McCoy, T.J., 2016, Widespread evidence for high-temperature formation of pentlandite in chondrites. Geochimica et Cosmochimica Acta, 189, 2016, 359–376. | |
| Khan, R., Shirai, N., Ebihara, M., 2015, Chemical characteristic of R chondrites in the light of P, REEs, Th and U abundances. Earth and Planetary Science Letters, 422, 18-27, http://dx.doi.org/10.1016/j.epsl.2015.04.008. | |
| 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. | |
| Weisberg, M.K., and Righter, K., 2015, Primitive Asteroids: Expanding the Range of Known Primitive Materials. 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. 65-77. | |
| 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. | |
| Rubin, A. E., 2014, Shock and annealing in the amphibole- and mica-bearing R chondrites. Meteoritics & Planetary Science, 49, 1057-1075. | |
| RELAB, , Reflectance Experiment Lab , catalogue of samples. | |