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Northwest Africa 10597
Basic information Name: Northwest Africa 10597
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10597
Observed fall: No
Year found: 2016
Country: Morocco
Mass:help 350 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Lunar (basalt)
Recommended:  Lunar (basalt)    [explanation]

This is 1 of 19 approved meteorites classified as Lunar (basalt).   [show all]
Search for other: Lunar meteorites
Comments: Approved 11 Apr 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10597 (NWA 10597)

Morocco

Purchased: 2016 Feb

Classification: Lunar meteorite (basalt)

History: Purchased by Ke Zuokai in Feb. 2016 at Tucson mineral show from an anonymous Moroccan dealer.

Physical characteristics: A single stone with a complete fresh fusion crust.

Petrography: The meteorite is a medium-grained unbrecciated basalt composed of elongate, zoned pyroxene (up to 1 mm) grains and plagioclase (up to 1.2 mm) laths. Olivine phenocrysts are up to 350 µm, and commonly have inclusions of hercynite, Ti-Al-rich chromite, pigeonite or rarely augite with intergrowth of Na-rich glass. Most pyroxene grains are pigeonite with a minor amount of augite. A few pigeonite grains have augite rims. Plagioclase  is partly converted to maskelynite. Late-stage mesostasis is composed of silica, Fe-rich olivine, Fe-rich pyroxene, K-rich glass, ilmenite, pyrrhotite, baddeleyite, and elongate, skeletal apatite and merrillite. Other opaque phases include chromite, Ti-rich chromite, troilite, ulvöspinel, tranquillityite, zirconolite and a few FeNi metal. Shock veins and impact melt pockets are present. Mineral modes (vol%): olivine = 6, pyroxene =52, plagioclase = 32, silica=3, ilmenite = 4, mesostasis + impact melt = 3.

Geochemistry: Plagioclase, An85.1±2.3Or0.4±0.3 (An78.5-87.8Or0.2-0.8, n=20); olivine zoned from Fo58.2-49.9 (cores) to Fo36.6-40.7 (rims) (Fa46.5-93.1, n=13; FeO/MnO = 81.9-106.8, average: 91±7); zoned pigeonite, core En57.7-51.6Wo8.9-16.8, rim En7.2-22Wo20.2-31.5 (Fs28.5-79.6Wo10.1-25.5, n=23), and augite, Fs21.3-52.5Wo28.4-39.3 (Wo32.9-36.2 En11.9-38.8, n=9), with pyroxene FeO/MnO = 30.8-81.9, average: 60±10; mesostasis olivine and pyroxene, Fo2.3-13.5 and En1-3Wo14-17. Chemical compositions (wt.%) of fusion crust: MgO 7.0, FeO 23.5, Al2O3 7.9, SiO2 47.4, CaO 10.6, TiO2 3.5.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Tucson, USA
Date:P 2016 Feb
Mass (g):350
Pieces:1
Class:Lunar (basalt)
Weathering grade:low
Fayalite (mol%):53±4.6 (n=9); 90.7±1.7 (n=4)
Ferrosilite (mol%):48.4±12.5 (n=23); 34.8±14 (n=9)
Wollastonite (mol%):17.2±5.1 (n=23); 34.5±3.7 (n=9)
Classifier:Wu Y., PMO
Type spec mass (g):20
Type spec location:PMO
Main mass:Ke Zuokai
Comments:Submitted by Hsu W.
Institutions
   and collections
PMO: Purple Mountain Observatory, Nanjing, China (institutional address; updated 16 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1374 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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