Sample Petrographic Description
Sample Number | EET 96040 |
Newsletter | 21,1 |
Location | Elephant Moraine |
Field Number | 10695 |
Dimensions (cm) | 7.5 x 3.0 x 5.5 |
Weight (g) | 276.20 |
Original Classification | H4 Chondrite |
Updated Classification | H4 Chondrite (Anomalous) |
Pairing | EET 96031; EET 96037; EET 96040; EET 96047; EET 96123; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 16;Ferrosilite (mol%): 14 | |
Weathering | |
B/C | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
The exteriors of these chondrites are covered with thin, patchy black fusion crust. They all have iridescent oxidation haloes and a few fractures. The interior is fine grained with some dark gray matrix visible. Some rust colored grains and metal are present. These meteorites are hard and coherent. | |
Thin Section Description (,2) - Tim McCoy | |
These four meteorites are likely paired and a common description is given. The sections show a close-packed aggregate of chondrules (usually less than 1 mm across), chondrule fragments and mineral grains in a dark matrix with abundant metal and troilite. The meteorite is moderately weathered and shocked. Polysynthetically twinned pyroxene is common. All four meteorites have olivine (Fa15-16) and pyroxene compositions (Fs13-14) which are below the range typical for H chondrites and similar to a small group of chondrites such as Willaroy (1993, GCA 57, 1867). The meteorites are unusual H4 chondrites. | |
Reclassification Notes (AMN 33,1) | |
anomalous due to reduced nature (AMN 21(1)) |
Antarctic Meteorite Images for Sample EET 96040 | ||||
Lab Photo(s) : | ||||