Sample Petrographic Description
Sample Number | EET 83235 |
Newsletter | 8,1 |
Location | Elephant Moraine |
Field Number | 2861 |
Dimensions (cm) | 7.0 x 6.0 x 4.0 |
Weight (g) | 254.60 |
Original Classification | Basaltic Achondrite |
Updated Classification | Eucrite (Polymict) |
Pairing | EET 79005; EET 83227; EET 83235; |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 26-54 | |
Weathering | |
B | |
Fracturing | |
B | |
Macroscopic Description - Roberta Score | |
This specimen looks similar to the other 1983 Elephant Moraine eucrites except that it appears to be more weathered. A thick dark gray weathering rind is present. | |
Thin Section Description (,3) - Jeremy Delaney | |
This specimen has a very dark matrix that appears to have been produced by weathering as the section contains gypsum/anhydrite. One pyroxenite clast with two crystals up to 1-mm across may be a fragment of an orthopyroxenite, but shock modification has produced inclined extinction. This clast is unexsolved. The section contains abundant pigeonite clasts with micron scale exsolution. Feldspar clasts in this section have abundant evidence of shock. One mafic clast has a gabbroic texture and contains lathy tridymite (?) crystals over 1-mm long. Several dark glassy or extremely fine-grained clasts are present. | |
Reclassification Notes (AMN 13,1) | |
This meteorite was re-classified as a polymict eucrite in AMN 13 no. 1. |
Antarctic Meteorite Images for Sample EET 83235 | ||||
Thin Section Photo(s) : | ||||