Meteoritical Bulletin, no. 100, in prep.
Found: 2010 September 25
Mass: 36.54 g
weathered mass was found on an open plain during systematic meteorite
characteristics: The 36.54 g irregularly shaped stone
lacks fusion crust and measures 4 × 4 × 2 cm. It has a dark,
L. Smith and A. T. Kearsley, NHM) The
sample is highly brecciated from the micro to macro-scale, and contains
numerous clasts in a heterogeneous, brecciated matrix. Melt veins, some
containing blebs of Fe-Ni metal, are pervasive. Melt spherules are also
observed. Larger clasts to ~1 mm are composed of
basaltic lithologies, melt clasts, KREEP-rich clasts, and pyroxferroites.
The matrix is brecciated and heterogeneous and is composed of mono and
polymineralic fragments. Many of the smaller polymineralic fragments appear
similar to the larger clasts. Matrix consists
predominantly of pyroxene and feldspar. Irregularly shaped Fe-Ni metal
grains (few micrometers to few tens of micrometers) occur and sulphide and schreibersite
are also observed. Ilmenite grains are fairly abundant.
Accessory phases include baddeleyite and silica. The sample is moderately
fractured and carbonate veins fill cracks and voids. No fusion crust
remains, although there is a distinct weathering rind preserved in some
Representative large clasts; basaltic clast pyroxene (Fs24.5-41.8Wo6.1-34.3,
Fe/Mn=58.4-74.3 and Fs18.9-72.2Wo4.9-24.1,
Fe/Mn=51.1-77.6), plagioclase (An86.7-93.6Or0.4-2.5
and An88.3-92.1Or0.7-2.0); pyroxferroite clast
(Fs45.0-58.8Wo21.5-39.0, Fe/Mn=71.5-96.8). Matrix
low-Ca pyroxene (Fs20.4-74.9Wo1.6-17.8,
Fe/Mn=47.8-76.3), high-Ca pyroxene (Fs6.6-70.1Wo20.5-51.4,
Fe/Mn=40.0-96.0), plagioclase (An83.4-98.8Or0.0-1.5).
All analyses by EPMA.
I. A. Franchi (OU)
δ17O = 3.638, 3.470 δ18O = 7.005, 6.676
Δ17O = -0.005, -0.002 all values in per mil. Bulk acid
Achondrite, lunar breccia with moderate to high weathering.
Main mass and one polished block at WAM.