Sample Petrographic Description
Sample Number | EET 96004 |
Newsletter | 21,1 |
Location | Elephant Moraine |
Field Number | 10605 |
Dimensions (cm) | 3.0 x 2.0 x 1.5 |
Weight (g) | 13.35 |
Original Classification | Howardite |
Pairing | EET 96003; EET 96004; |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 29-38 | |
Weathering | |
A | |
Fracturing | |
A | |
Macroscopic Description - Kathleen McBride | |
These achondrites are covered with a black patchy fusion crust with a shiny luster and some glassy appearing areas. Fusion crust covers 50% of the exterior surfaces. The interior is a dull, powdery gray matrix with numerous tan and white angular to sub-angular inclusions, mm size in diameter. | |
Thin Section Description (,4) - Brian Mason | |
The sections are so similar that a single description will suffice; the meteorites are probably paired. The sections show a groundmass of comminuted pyroxene and plagioclase (average grain size 0.1 mm), with a few larger clasts (up to 2 mm) of these minerals. Section 96003,4 has a coarse-grained gabbroic clast 6 mm across. Microprobe analyses show that most of the pyroxene is hypersthene (Wo1-5, Fs31-45); one grain of augite, Wo38Fs21, was analyzed, and a few grains of intermediate composition. Plagioclase composition is An82-95. The meteorites are howardites. |
Antarctic Meteorite Images for Sample EET 96004 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample EET 96004 | ||||
Thin Section Photo(s) : | ||||