Sample Petrographic Description
Sample Number | DOM 18218 |
Newsletter | 45,2 |
Location | Dominion Range |
Field Number | 25194 |
Dimensions (cm) | 2.1 x 2.0 x 1.6 |
Weight (g) | 12.09 |
Original Classification | L3.8 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 23-28;Ferrosilite (mol%): 20-21 | |
Weathering | |
A/B | |
Fracturing | |
B | |
Macroscopic Description - Curtis Calva | |
The fusion crust is rough and very dark brown to black in color. The sample is round with fractures and large rust halos that are orange. The interior has a black matrix that is slightly rusty with grey spherical inclusions and metal. | |
Thin Section Description - | |
This section exhibits numerous, well-defined chondrules, chondrule fragments and individual mineral grains (up to ~1 mm). Pyroxene is polysynthetically twinned. The meteorite is only modestly weathered with staining of some grains visible. Shock effects are minimal. Olivines are unequilibrated and are Fa23-28. Pyroxenes are Fs20-21Wo2. The meteorite is an L3 chondrite, likely subtype 3.8. |
Antarctic Meteorite Images for Sample DOM 18218 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample DOM 18218 | ||||
Thin Section Photo(s) : | ||||