Newsletter |
43,1 |
Location |
Dominion Range |
Field Number |
25846 |
Dimensions (cm) |
3.0 x 2.0 x 2.5 |
Weight (g) |
25.07 |
Original Classification |
Lunar-Basaltic Breccia |
Pairing |
DOM 18242;
DOM 18244;
DOM 18262;
DOM 18509;
DOM 18543;
DOM 18545;
DOM 18666;
DOM 18678;
|
Ferrosilite (mol%): 20-64 |
A/B |
A |
Exterior has a dark brown fusion crust that is rough with light spots less than 1 mm. Approximately 40% fusion crust on the exterior and it is slightly fractured. Exposed interior is dark gray to black with light colored inclusions. The interior is dark gray to black with light brown and white inclusions that are less than 2 mm. |
These sections are similar enough that one description will suffice. They consist of a highly brecciated assemblage of mostly single mineral grains ranging up to 0.5 mm in size. Grains are dominated by pyroxene and plagioclase (no olivine grains were analyzed in these sections). Polymineralic igneous fragments/clasts include coarse grained gabbro and symplectites. Melt veins and pockets were observed in both sections. Pyroxene is dominantly pigeonite with fine exsolution, with orthopyroxene of Fs30Wo3 and augite Fs20-64Wo20-39. Fe/Mn of pyroxenes ranges from ~50-70. Plagioclase is calcic with An91-99Or0.1-0.3. These meteorites are lunar basaltic breccias, likely regolith breccias and are most certainly paired with DOM 18262 pairing group reported in the Fall 2019 newsletter. |