Sample Petrographic Description
| Sample Number | MIL 07028 |
| Newsletter | 34,1 |
| Location | Miller Range |
| Field Number | 17580 |
| Dimensions (cm) | 9.5 x 7.5 x 7.3 |
| Weight (g) | 1158.92 |
| Original Classification | EH3 Chondrite |
| Pairing | MIL 07241; MIL 07028; MIL 07139; MIL 07364; MIL 07369; MIL 07393; MIL 07654 |
| Mineral Composition (%Fa & %Fs) | |
| Ferrosilite (mol%): 1-17 | |
| Weathering | |
| B | |
| Fracturing | |
| A/B | |
| Macroscopic Description - Kathleen McBride, Cecilia Satterwhite | |
| Thin brown/black fusion crust is present on the fractured exterior surfaces. Areas without fusion crust have brown oxidation and rusty areas. The interiors are rusty with crystalline texture and visible metal. | |
| Thin Section Description (,2) - Cari Corrigan, Linda Welzenbach | |
| These sections are similar enough that one description suffices. The sections show an aggregate of chondrules (up to 1 mm), chondrule fragments, and pyroxene grains in a matrix of about 30% metal and sulfide, including daubreelite. Microprobe analyses show pyroxene is Fs1-17, though most are Fs1. Kamacite ranges from 2.4-2.7 wt. % Si. These meteorites are EH3 chondrites and are probably part of the MIL 07241 pairing group. | |
| Antarctic Meteorite Images for Sample MIL 07028 | ||||
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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 07028 | ||||
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| Antarctic Meteorite Images for Sample MIL 07028 | ||||
| Thin Section Photo(s) : | ||||
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| References for Sample MIL07028 | |
| Hellmann, J.L., Hopp, T., Burkhardt, C., Becker, H., Fischer-Godde, M., and Kleine, T., 2021, Tellurium isotope cosmochemistry: Implications for volatile fractionation in chondrite parent bodies and origin of the late veneer. , Geochimica et Cosmochimica Acta, 309 , 313–328 , https://doi.org/10.1016/j.gca.2021.06.038 . | |
| Sikdar, J., and Rai, V.K., 2021, Mg isotope variations in microphases of unequilibrated enstatite chondrites. , Meteoritics & Planetary Science, 56 , 1459–1477 , doi: 10.1111/maps.13722 . | |
| Zhao, C., Lodders, K., Bloom, H., Chen, H., Tian, Z., Koefoed, P., Petö, M.K., and Wang, K., 2020, Potassium isotopic compositions of enstatite meteorites. , Meteoritics & Planetary Science, 55 , 1404–1417 , doi: 10.1111/maps.13358. | |
| Defouilloy, C., Cartigny, P., Assayag, N., Moynier, F., Barrat, J. A., 2016, High-precision sulfur isotope composition of enstatite meteorites and implications of the formation and evolution of their parent bodies. , Geochimica et Cosmochimica Acta, 172 , 393-409 . | |
| Barrat, J. A., Zanda, B., Jambon, A., Bollinger, C., 2014, The lithophile trace elements in enstatite chondrites. , Geochimica et Cosmochimica Acta, 128 , 1-Mar-14 , 71-94 , ISSN 0016-7037 , http://dx.doi.org/10.1016/j.gca.2013.11.042 . | |
| RELAB, , Reflectance Experiment Lab , catalogue of samples, . | |