Sample Petrographic Description
| Sample Number | CMS 04049 |
| Newsletter | 28,2 |
| Location | Cumulus Hills |
| Field Number | 14086 |
| Dimensions (cm) | 6.0 x 2.5 x 3.5 |
| Weight (g) | 90.21 |
| Original Classification | Eucrite (Unbrecciated) |
| Mineral Composition (%Fa & %Fs) | |
| Ferrosilite (mol%): 28-59 | |
| Weathering | |
| B | |
| Fracturing | |
| A/B | |
| Macroscopic Description - Kathleen McBride | |
| 40% of the exterior is covered with black fusion crust with shiny patches. The interior consists of black and white mineral grains with some gray globs and translucent, tabular shaped minerals. | |
| Thin Section Description (,4) - Tim McCoy | |
| The section shows an unbrecciated intergrowth of coarse (up to 1 mm) pyroxene and plagioclase grains with a gabbroic texture. Pyroxene is exsolved to orthopyroxene (Fs50Wo5) and augite (Fs28Wo41) (Fe/Mn ~30) and plagioclase is An79-91Or0-1. Shock effects are extensive including darkening of silicates. The meteorite is an unbrecciated eucrite. | |
| Antarctic Meteorite Images for Sample CMS 04049 | ||||
| Field Photo(s) : | ||||
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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 CMS 04049 | ||||
| Lab Photo(s) : | ||||
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| References for Sample CMS04049 | |
| Kumler, B., Day, J.M.D., 2021, Trace element variations generated by magmatic and post-crystallization processes in eucrite meteorites. , Geochimica et Cosmochimica Acta, 301 , 211–229 , https://doi.org/10.1016/j.gca.2021.03.002 . | |
| McCubbin, F.M., Lewis, J.A., Barnes, J.J., Elardo, S.M., and Boyce, J.W., 2021, The abundances of F, Cl, and H2O in eucrites: Implications for the origin of volatile depletion in the asteroid 4 Vesta. , Geochimica et Cosmochimica Acta, 314 , 270–293 , https://doi.org/10.1016/j.gca.2021.08.021 . | |