Newsletter |
43,1 |
Location |
Dominion Range |
Field Number |
24563 |
Dimensions (cm) |
3.0 x 2.1 x 2.2 |
Weight (g) |
15.92 |
Original Classification |
Lunar-Basaltic Breccia |
Pairing |
DOM 18242;
DOM 18244;
DOM 18262;
DOM 18509;
DOM 18543;
DOM 18545;
DOM 18666;
DOM 18678;
|
Ferrosilite (mol%): 31-52 |
A/B |
B |
Exterior is dark grey brown with some fracturing and small (0.5-1mm) white inclusions. There are also some light grey-brown inclusions that are up to 3 mm in size. Fresh interior is grey matrix with inclusions that are white, light brown or grey and up to 3 mm in size. |
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. |