Name:Northwest Africa 482
Abbreviation:NWA 482
Country: (Northwest Africa)
(Northwest
Status:Valid
Fall: No
Year:2000
Class:Lunar (anorth)
TKW, g:1015
Bibliography:A 1015 g stone was purchased on 2001 January 10 in Alnif, Morocco, by Michael Farmer. The exact location of find is unknown but it is possibly in Algeria. The stone is complete, oriented, and appears relatively unweathered. Classification and mineralogy (A. Rubin and P. Warren, UCLA; D. Kring and I. Daubar, UAz): texture is typical of a crystalline impact melt breccia (polymict) with highland affinities; glassy and vesicular melt veins and melt pockets indicate shock subsequent to compaction by an impact event; plagioclase, An95.7Ab4.09Or0.17 (n = 136, UAz); olivine, Fo65–68 (average Fo66) with FeO/MnO = 88 ± 7 g/g (UCLA); olivine Fo68.4 with FeO/MnO = 93.9 ± 7.7 g/g (range: 78.7 to 111) (n = 51, UAz); pyroxene, Fs25Wo17 with nearly uniform Mg/(Mg + Fe) = 67–68 mol% and FeO/MnO = 51 ± 6 g/g (n = 10, UCLA); pyroxene, Wo10.3–51En32.6–63.9 Fs42.6–14.2, mean Mg/(Mg + Fe) = 68 mol%, FeO/MnO = 52 ± 8 g/g (n = 28, UAz); glassy melt veins occur in both UCLA and UAz samples; a 0.1 mm vein (UCLA) has SiO2 = 44.3 wt%, Na2O = 0.3 wt%, Al2O3 = 30.0 wt%, FeO = 3.6 wt%, MgO = 3.9 wt%, CaO = 17.3 wt%, and TiO2 = 0.3 wt%, which may approximate the bulk meteorite composition. Specimens: half of the main mass is with Farmer; 74 g, DPitt; type specimens, 24 g, UCLA, and 18 g, UAz.
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Approved images (4)


Photo courtesy: Jim Strope

Photo courtesy: Jim Strope

Photo courtesy: Jim Strope

Photo courtesy: Peter Marmet

Member's images (25)

ImageWeight / Size / ShapeCollection
0.17 gr.
Fragment
David Hardy
5.46g
Part slice
Jay Piatek
0.014g
Part slice
Brice D. Hornback
.108 grams
Slice
Richard C Cavalieri
micro
micro
Fragment
t.czarnecki
mg
Dust
Other
Dave Johnson
dust
dust
Other
Toms
.01 gr.
Other
David Hardy
.004 g
Fragment
eraserhead
6 mg
3 mm
Fragment
Michael S. Scherman
.060 grams
Fragment
MeteoriteCollector.org - FCOM - Russ Finney
.0038 Gram
Fragment
Phil Schmitz
0.006 grams
3x2x1 mm
Fragment
Gerald Armstrong
Coin with fragm
NA
Fragment
Gerald Armstrong
.056g
Slice
Edward Krikorian
0,06
Slice
Christopher Brandl
20mg
Andreas Grünemeyer
0.274g
Part slice
Doug R
0.010 grams
Micro
Fragment
Chris Spratt
0.046 gr.
Part slice
Astro-Piet
4.45 grams
Slice
Jim Strope
micro
saw dust
Other
xeqtr
0,004g
Fragment
Francois Pacaud
0.036
Part slice
Szymon Kozlowski (simkoz)
micro
Other
Alan Mazur
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