Sample Petrographic Description
Sample Number | MET 00636 |
Newsletter | 26,1 |
Location | Meteorite Hills |
Field Number | 13571 |
Dimensions (cm) | 2.0 x 1.0 x 0.75 |
Weight (g) | 2.51 |
Original Classification | EH4 Chondrite |
Pairing | MET 00636; MET 00783; |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 0-1 | |
Weathering | |
C | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
The exteriors of these meteorites are rust colored. The interiors have a non-descript, brittle, rust colored matrix. | |
Thin Section Description (,2) - Tim McCoy | |
These two meteorites are tentatively paired. Found 4.5 km apart, they exhibit similar features, although these same features are shared by many EH4 chondrites. The sections show an aggregate of chondrules (up to 1 mm), chondrule fragments, and pyroxene grains in a matrix of about 30% metal and sulfide. Weathering is significant, with staining of some enstatite grains and minor alteration of metal and sulfides. Orthopyroxene is Fs0-1 and metal contains ~3 wt.% Si. The meteorites are EH4 chondrites. |
References for Sample MET00636 | |
Weyrauch, M., Horstmann, M., and Bischoff, A., 2018, Chemical variations of sulfides and metal in enstatite chondrites—Introduction of a new classification scheme. Meteorit Planet Sci, , 53, 394-415, doi:10.1111/maps.13025. |