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Northwest Africa 7961
Basic information Name: Northwest Africa 7961
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7961
Observed fall: No
Year found: 2013
Country: Morocco
Mass:help 252 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  LL5
Recommended:  LL5    [explanation]

This is 1 of 3181 approved meteorites (plus 1 unapproved name) classified as LL5.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 19 Jul 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7961 (NWA 7961)

Morocco

Purchased: 2013

Classification: Ordinary chondrite (LL5)

History: Purchased by Jengemjs Sahanov at the Tucson Gem and Mineral Show in 2013.

Physical characteristics: Single stone, black fusion with some polygonal cracks, saw cut reveals very fine-grained light orange-brown groundmass, tiny scattered opaques.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a few equilibrated chondrules, abundant plagioclase, accessory chromite and Cl-rich apatite.

Geochemistry: (C. Agee and L. Burkemper, UNM) Olivine Fa33.2±1.7, Fe/Mn=66±4, n=13; low-Ca pyroxene Fs27.0±1.3Wo3.1±0.2, Fe/Mn=41±2, n=12; plagioclase Ab84.0±1.6An10.1±0.1Or5.8±1.6, n=4.

Classification: Ordinary chondrite (LL5), weathering grade W1.

Specimens: 21.8 g including a probe mount on deposit at UNM, Jengemjs Sahanov holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2013
Mass (g):252
Pieces:1
Class:LL5
Weathering grade:W1
Fayalite (mol%):33.2±1.7
Ferrosilite (mol%):27.0±1.3
Wollastonite (mol%):3.1±0.2
Classifier:C. Agee, UNM
Type spec mass (g):21.8
Type spec location:UNM
Main mass:Jengemjs Sahanov
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1847 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater)

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