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Northwest Africa 7277
Basic information Name: Northwest Africa 7277
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7277
Observed fall: No
Year found: 2004
Country: Morocco
Mass:help 342 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  LL6
Recommended:  LL6    [explanation]

This is 1 of 2788 approved meteorites (plus 1 unapproved name) classified as LL6.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 16 May 2012
Writeuphelp
Writeup from MB 100:

Northwest Africa 7277 (NWA 7277)

Morocco

Purchased: 2004

Classification: Ordinary chondrite (LL6)

History: Purchased by Blaine Reed in Denver, 2004.

Physical characteristics: Single stone, saw cut reveals a few poorly defined chondrules, and metal/sulfide grains, set in a weathered, light and dark brown matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows 70% olivine, 15% pyroxene, 10% plagioclase, finely disseminated troilite and Fe,Ni-metal. Plagioclase up to 100 μm, chondrules barely discernible.

Geochemistry: (C. Agee and N. Wilson, UNM) Olivine Fa31.4±0.8, Fe/Mn=64±3, n=10; low-Ca pyroxene Fs25.9±0.4Wo1.8±0.3, Fe/Mn=38±2, n=8, high-Ca pyroxene Fs10.7±0.6Wo44.5±0.8, Fe/Mn=28±2, n=2, plagioclase Ab84.8±0.9An10.7±1.1Or4.5±0.2, n=2.

Classification: Ordinary chondrite (LL6), weathering grade W3.

Specimens: 22.4 g including a probe mount on deposit at UNM, Reed holds the main mass.

Data from:
  MB100
  Table 1
  Line 1704:
Place of purchase:Denver
Date:P 2004
Mass (g):342
Pieces:1
Class:LL6
Weathering grade:W3
Fayalite (mol%):31.4±0.8
Ferrosilite (mol%):25.9±0.4
Wollastonite (mol%):1.8±0.3
Classifier:C. Agee, UNM
Type spec mass (g):22.4
Type spec location:UNM
Main mass:Reed
Comments:Submitted by C. Agee
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)
Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1459 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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