2.39 grams 23x11x8mm NWA 8455 Lunar Moon Meteorite whole individual with COA

Description

Moroccan meteorite hunters went back to the area the main mass 2.81 kilo Lunar meteorite was found in 2014. They found many more small lunar individuals and fragments.
Northwest Africa 8455
Basic information
Name:
Northwest Africa 8455
This is an OFFICIAL meteorite name.
Abbreviation:
NWA 8455
Observed fall:
No
Year found:
2014
Country:
(Northwest Africa)
Mass:
2.81 kg
Classification
history:
Meteoritical Bulletin:
(2014)
Lunar
Recommended:
Lunar
This is 1 of 82 approved meteorites classified as Lunar.
Comments:
Approved 23 Jun 2014
Northwest Africa 8455
(NWA 8455)
(Northwest Africa)
Purchased: 2014
Classification: Lunar meteorite
History
: Purchased from a Moroccan meteorite dealer in 2014.
Physical characteristics
: Single stone, no fusion crust, irregular exterior with desert patina, freshly broken surface and saw cut reveals a few scattered millimeter-sized white feldspar clasts set in a very dark gray groundmass.
Petrography
: (C. Agee,
UNM
) Microprobe examination of a polished mount shows this specimen to be a fragmental breccia composed of clasts (up to ~500 μm) of individual plagioclase, pyroxene, olivine grains, and also lithic clasts (up to ~1 mm) of gabbro and shock melt, set in a pervasive matrix of micrometer- to submicrometer-sized silicates. Accessory ilmenite, silica polymorph, chromite, phosphate, Fe-metal.
Geochemistry
: (C. Agee and N. Muttik). Olivine Fa
26.6±3.5
, Fe/Mn=100±9, n=28; pigeonite Fs
26.2±6.2
Wo
8.7±4.4
, Fe/Mn=58±5, n=22; augite Fs
21.5±8.4
Wo
34.5±6.8
, Fe/Mn=55±11, n=11; plagioclase An
95.1±1.0
Ab
4.5±1.0
Or
0.4±0.1
, n=4. Shock melt (proxy for bulk composition) SiO
2
=44.6±1.1, TiO
2
=0.59±0.53, Al
2
O
3
=26.1±3.2, Cr
2
O
3
=0.10±0.03, MgO=6.8±1.8, FeO=5.0±1.3, MnO=0.04±0.03, NiO=0.02±0.01, Na
2
O=0.69±0.20, K
2
O=0.19±0.04 (all wt%).
Classification
: Achondrite (lunar feldspathic breccia)
Specimens
: 20.5 g, including a probe mount is on deposit at
UNM
. J. Piatek holds the main mass.
Place of purchase:
Morocco
Date:
P 2014
Mass (g):
2814
Pieces:
Class:
Lunar
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