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, desert-varnished
(C. 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 places.
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.