Sample Petrographic Description
Sample Number | MIL 07411 |
Newsletter | 33,2 |
Location | Miller Range |
Field Number | 18661 |
Dimensions (cm) | 3.0 x 1.5 x 1.0 |
Weight (g) | 14.52 |
Original Classification | CB Chondrite |
Updated Classification | CBa Chondrite |
Pairing | MIL 05082; MIL 07404; MIL 07411; MIL 07558; MIL 07588; MIL 07598; MIL 090985; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 18;Ferrosilite (mol%): 1-4 | |
Weathering | |
B/C | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
This meteorite is very friable and consists mainly of large (>5mm) rusty chondrules and lesser amounts of rusting gray matrix. | |
Thin Section Description (,2) - Cari Corrigan, Linda Welzenbach | |
The section consists of one 2.5 mm metal chondrule and chondrule fragments. Chondrule fragments up to 0.5 mm are dominated by radiating pyroxene textures with olivine present. Silicates are magnesian (Fa1-18, Fs1-4Wo0.1-7). The meteorite is a CB chondrite and may be paired with MIL 05082 and MIL 07588. | |
Reclassification Notes (AMN 46,1) | |
MIL 05082 and its pairs have cm-sized chondrules, and are clearly part of the CBa subgroup of CB chondrites; see more detailed discussion in Weisberg, M.K. and Righter, K. (2014). Primitive Asteroids. In 35 Seasons of U.S. Antarctic Meteorites (1976–2010) (eds K. Righter, C.M. Corrigan, T.J. McCoy and R.P. Harvey). | |
Astromaterials 3D Link(s) | |
https://ares.jsc.nasa.gov/astromaterials3d/sample-details.htm?sample=MIL07411-0 |
Antarctic Meteorite Images for Sample MIL 07411 | ||||
Thin Section Photo(s) : | ||||
References for Sample MIL07411 | |
Simkus, D. N., Aponte, J. C., Elsila, J. E., Parker, E. T., Glavin, D. P., & Dworkin, J. P., 2019, Methodologies for Analyzing Soluble Organic Compounds in Extraterrestrial Samples: Amino Acids, Amines, Monocarboxylic Acids, Aldehydes, and Ketones. Life, 9, 47. | |
Burton, A. S., Elsila, J. E., Hein, J. E., Glavin, D. P., Dworkin, J. P., 2013, Extraterrestrial amino acids identified in metal-rich CH and CB carbonaceous chondrites from Antarctica. Meteoritics & Planetary Science, 48, 390-402, http://dx.doi.org/10.1111/maps.12063. |