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Northwest Africa 8277
Basic information Name: Northwest Africa 8277
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8277
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 773 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Lunar meteorite
Recommended:  Lunar    [explanation]

This is 1 of 88 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 11 Mar 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8277 (NWA 8277)

(Northwest Africa)

Purchased: 2013

Classification: Lunar meteorite

History: Purchased by Adam Aaronson in Morocco, 2013.

Physical characteristics: Single stone, no fusion crust, irregular sandblasted exterior with numerous light- and dark-colored clasts. Saw cut reveals brecciated texture with white feldspar and green-brown pyroxene and olivine grains (up to 3 mm) set in a dark gray-green matrix.

Petrography: (C. Agee, UNM) Microprobe examination of polished mount shows a fragmental breccia of plagioclase, pyroxene, and olivine grains in a wide range of grain sizes. The groundmass is variable with some domains showing a uniform fine-grained subophitic plagioclase-pyroxene texture, while other domains show densely packed mineral clasts ranging from 10-300 μm. There are several sharp boundaries between the various textural domains, with at least two compositionally distinct olivine populations, and a wide range of pyroxene compositions, indicating multiple lithologies of a mingled fragmental breccia. Accessory ilmenite, silica polymorph, and troilite.

Geochemistry: (C. Agee, UNM). Fayalitic olivine grain Fa92.0, Fe/Mn=92; forsteritic olivine Fa41.1±11.8, Fe/Mn=103±8, n=9; pyroxene Fs40.5±12.9Wo22.4±9.4, Fe/Mn=65±9, n=63; plagioclase An90.9±7.2Ab8.6±6.8Or0.5±0.5, n=30.

Classification: Achondrite (lunar breccia), comparison of macroscopic and backscatter-electron textures, geochemistry of pyroxenes, olivines, and plagioclase, indicate that this meteorite is likely paired with NWA 7611.

Specimens: A total of 21 g including a probe mount on deposit at UNM. Aaronson holds the main mass.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2013
Mass (g):773
Pieces:1
Class:Lunar meteorite
Classifier:C. Agee, UNM
Type spec mass (g):21
Type spec location:UNM
Main mass:Adam Aaronson
Comments:Field name M1560; submitted by C. Agee, UNM
Institutions
   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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
John A. Shea   
Rodrigo Guerra   
Russ Opdahl      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7005 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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