Sample Petrographic Description
Sample Number | MIL 11197 |
Newsletter | 36,1 |
Location | Miller Range |
Field Number | 21488 |
Dimensions (cm) | 3.9 x 3.3 x 1.2 |
Weight (g) | 39.26 |
Original Classification | Diogenite |
Pairing | MIL 07003; MIL 07613; MIL 090105; MIL 090106; MIL 090107; MIL 090112; MIL 090159; MIL 090220; MIL 090221; MIL 090291; MIL 11099; MIL 11197; MIL 11198; MIL 11199; MIL 11201; MIL 11202; MIL 11204; MIL 11205; |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 28-29 | |
Weathering | |
B | |
Fracturing | |
A/B | |
Macroscopic Description - Cecilia Satterwhite | |
70% of the exterior has black patches of fusion crust that are glassy in areas. Areas without fusion crust reveal a tan/crème colored matrix. The interior is a crème/tan colored matrix with some crystalline faces and some yellow oxidation. | |
Thin Section Description (,2) - Cari Corrigan, Andrew Beck, Tim McCoy | |
The section is made up of coarse (up to 1-3 mm) intergrown pyroxene, with minor interstitial plagioclase and euhedral chromites (30 microns). A small amount of exsolution appears in the larger pyroxene grains. Pyroxene compositions are Fs28-29Wo3-5and plagioclase is An88-95Or1. The Fe/Mn ratio of the pyroxene is ~26-28. This meteorite is an unbrecciated diogenite. | |
Notes | |
MIL 07003, MIL 07613 (4 – 090105, 090106, 090107), MIL 090159 (3 – 090220, 090221), MIL 090112 (7 – 090291, 11099, 11201, 11202, 11204, 11205), MIL 11197, MIL 11198, and MIL 11199. Combination of these three diogenite pairing groups as well as four previously unpaired masses to form a new large 18 member pairing group of diogenites MIL 07003; based on terrestrial ages, compositions, find locations, and petrographic textures. Pairing updated in AMN 47,1. |
Antarctic Meteorite Images for Sample MIL 11197 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample MIL 11197 | ||||
Thin Section Photo(s) : | ||||