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Northwest Africa 11967
Basic information Name: Northwest Africa 11967
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11967
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 2.35 kg
Classification
  history:
Recommended:  LL3    [explanation]

This is 1 of 295 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 23 Sep 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11967 (NWA 11967)

(Northwest Africa)

Purchased: 2015

Classification: Ordinary chondrite (LL3)

History: Purchased by Jay Piatek on June 26, 2015, from a Moroccan meteorite dealer.

Physical characteristics: Single stone, weathered exterior. A saw cut reveals numerous distinct, closely packed chondrules set in a brown groundmass. Mild brecciation was observed.

Petrography: (C. Agee, UNM) This meteorite has many porphyritic chondrules, most with mesostasis or glass, set in abundant opaque matrix. Apparent mean chondrule size is 800±500 μm, n=19.

Geochemistry: (C. Agee, UNM) Coarse-grained (non-matrix) ferroan olivine Fa23.3±8.2, Cr2O3=0.18±0.22 (wt%), n=17; low-Ca pyroxene Fs15.5±11.1Wo0.8±0.5, n=11.

Classification: Ordinary chondrite LL3 breccia. Cr2O3 distribution in olivine is similar to Ngawi (LL3.0-3.7) as described in Grossman and Brearley (2005)) with two populations, one resembling Semarkona Cr2O3=0.50±0.08 and one resembling Bremervörde Cr2O3=0.04±0.03 (wt%).

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

Bibliography:
  • Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)
Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2015
Mass (g):2347.3
Pieces:1
Class:LL3
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):23.3±8.2
Ferrosilite (mol%):15.5±11.1
Wollastonite (mol%):0.8±0.5
Classifier:C. Agee, UNM
Type spec mass (g):22.4
Type spec location:UNM
Main mass:Jay Piatek
Comments:Field name JP-90; 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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6438 approved meteorites from (Northwest Africa) (plus 2025 unapproved names)

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