Sample Petrographic Description
Sample Number | MIL 15328 |
Newsletter | 40,1 |
Location | Miller Range |
Field Number | 23047 |
Dimensions (cm) | 7.0 x 5.5 x 5.5 |
Weight (g) | 320.60 |
Original Classification | CR2 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-33;Ferrosilite (mol%): 2-4 | |
Weathering | |
B | |
Fracturing | |
B/C | |
Macroscopic Description - Cecilia Satterwhite | |
90% black fractured fusion crust covers the exterior surface; abundant fractures penetrate the surface; light colored and weathered inclusions/chondrules are visible on the exterior surface. The interior is a dark gray to black matrix with abundant inclusions/chondrules of various sizes and colors, some are weathered; the meteorite is heavily weathered in areas along the fractures, has a crumbly texture and some rusty areas. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy, Nicole Lunning | |
The section exhibits a range of chondrule sizes (500 micron to 2 mm), that are well-defined and metal-rich along with CAIs in a dark matrix of FeO-rich phyllosilicate. Polysynthetically twinned pyroxene is abundant in chondrules. Silicates are unequilibrated; olivines range from Fa1-33, with most Fa0-2, and pyroxenes from Fs2-4Wo1. The meteorite is probably a CR2 chondrite. |
Antarctic Meteorite Images for Sample MIL 15328 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample MIL 15328 | ||||
Thin Section Photo(s) : | ||||
References for Sample MIL15328 | |
Hiroi, T., Ohtsuka, K., Howard, K.T., Robertson, K.R., and Milliken, R.E., Kaiden, H., Imae, N., Misawa, K., Kojima, H., Sasakia, S., Matsuokaa, M., Nakamura, T., Bish, D.L., 2021, UV-visible-infrared spectral survey of Antarctic carbonaceous chondrite chips. Polar Science, 29, 100723, https://doi.org/10.1016/j.polar.2021.100723. | |
Takir, D., Stockstill-Cahill, K. R., Hibbitts, C. A., & Nakauchi, Y. , 2019, 3-µm reflectance spectroscopy of carbonaceous chondrites under asteroid-like conditions. Icarus, 333, 243-251. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |