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Northwest Africa 8727
Basic information Name: Northwest Africa 8727
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8727
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 2.44 kg
Meteoritical Bulletin:  MB 104  (2015)  Lunar (olivine gabbro)
Recommended:  Lunar (olivine gabbro)    [explanation]

This is the only approved meteorite classified as Lunar (olivine gabbro).
Search for other: Lunar meteorites
Comments: Approved 28 Jan 2015
Writeup from MB 104:

Northwest Africa 8727 (NWA 8727)

(Northwest Africa)

Purchased: 2014

Classification: Lunar (olivine gabbro)

History: Purchased from a Moroccan meteorite dealer in September 2014

Physical characteristics: Single stone, smooth weathered fusion crust. Saw cut and polished surface reveals fine-grained, light gray interior with fine shock melt veining.

Petrography: (C. Agee, UNM) Microprobe examination of the deposit sample, shows a monomict breccia with approximately 75% plagioclase, 10% olivine, 10% pigeonite. Primarily fine-grained plagioclase, olivine, and pigeonite 5-50 μm, scattered larger plagioclase clasts 200-500 μm. Shock melt veins are found throughout. Accessory phases include Fe-metal, ilmenite, and apatite.

Geochemistry: (C. Agee and N. Muttik, UNM). olivine Fa26.3±0.6, Fe/Mn=95±1, n=26; pigeonite Fs22.3±1.1Wo7.4±2.3, Fe/Mn=61, n=21; plagioclase An95.0±1.1Ab4.5±0.9Or0.5±0.2, n=8; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=44.35±0.66, TiO2=0.93±0.28, Al2O3=29.06±1.06, Cr2O3=0.09±0.01, MgO=5.93±0.71, FeO=4.82±0.44, MnO=0.06±0.02, CaO=15.50±0.49, NiO=0.08±0.03, Na2O=0.55±0.03, K2O=0.12±0.01 (all wt%), Fe/Mn=84±29, Mg#=68.6±1.8, n=5.

Classification: Achondrite (lunar olivine leuco-gabbro), low weathering grade, high shock stage.

Specimens: A total of 20.6 g including a probe mount on deposit at UNM. DPitt holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2014
Mass (g):2436.3
Class:Lunar (olivine gabbro)
Shock stage:high
Weathering grade:low
Fayalite (mol%):26.3±0.6
Ferrosilite (mol%):22.3±1.1
Wollastonite (mol%):7.4±2.3
Classifier:C. Agee, UNM
Type spec mass (g):20.6
Type spec location:UNM
Main mass:Darryl Pitt
Comments:Field name MAC 70; submitted by C. Agee, UNM
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 9570 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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