Sample Petrographic Description
| Sample Number | PCA 02019 |
| Newsletter | 27,1 |
| Location | Pecora Escarpment |
| Field Number | 13646 |
| Dimensions (cm) | 2.5 x 2.5 x 1.5 |
| Weight (g) | 11.70 |
| Original Classification | Howardite |
| Pairing | PCA 02009; PCA 02013; PCA 02014; PCA 02015; PCA 02016; PCA 02018; PCA 02019; PCA 02065; PCA 02066 |
| Mineral Composition (%Fa & %Fs) | |
| Fayalite (mol%): 28;Ferrosilite (mol%): 24-55 | |
| Weathering | |
| B | |
| Fracturing | |
| A/B | |
| Macroscopic Description - Kathleen McBride | |
| Fusion crust ranges from black to brown and is shiny and glassy with oxidation haloes. The interiors of these howardites are a gray to black matrix with some oxidation and multicolored inclusions. | |
| Thin Section Description (,2) - Tim McCoy, Linda Welzenbach | |
| These sections are similar enough that a single description will suffice. Each show a groundmass of comminuted pyroxene (up to 2 mm) and plagioclase with fine- to coarse-grained basaltic, impact-melt and diogentitic clasts ranging up to 3 mm. Minerals include abundant orthopyroxene with compositions ranging from Fs17-60Wo2-8 (Fe/Mn ~29), augite of Fs~40, plagioclase (An90-95) and SiO2. These meteorites are howardites. They are almost certainly paired with each other and with PCA 02016. | |
| Antarctic Meteorite Images for Sample PCA 02019 | ||||
| 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 PCA 02019 | ||||
| Lab Photo(s) : | ||||
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| References for Sample PCA02019 | |
| Hahn, T.M., Lunning, N.G., McSween, H.Y., Bodnar, R.J., and Taylor, L.A., 2017, Mg-rich harzburgites from Vesta: Mantle residua or cumulates from planetary differentiation. , Meteoritics & Planetary Science, 53 , 514-546 , doi: 10.111/maps.13036. | |
| Beck, A. W., Welten, K. C., McSween Jr., H. Y., Viviano, C. E., Caffee, M. W., 2012, Petrologic and textural diversity among the PCA 02 howardite group, one of the largest pieces of the Vestan surface. , Meteoritics & Planetary Science, 47 , 947-969 . | |