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Northwest Africa 11849
Basic information Name: Northwest Africa 11849
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11849
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 335 g
Meteoritical Bulletin:  MB 107  (2018)  L6-an
Recommended:  L6-an    [explanation]

This is the only approved meteorite classified as L6-an.
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 4 Jul 2018
Writeup from MB 107:

Northwest Africa 11849 (NWA 11849)

(Northwest Africa)

Purchased: 2018 Jan

Classification: L6-an

History: Purchased by Greg Hupe in January 2018 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Vesicular, metal-poor specimen consisting predominantly of finely recrystallized mafic silicates together with accessory sodic plagioclase, chromite, troilite and stained kamacite. Very sparse remnant chondrules are present, as well as poikiloblastic regions (presumably former chondrules). Small, spherical vesicles are present throughout.

Geochemistry: Olivine (Fa24.4-25.0, N = 3), orthopyroxene (Fs18.9-20.5Wo4.0-4.4, N = 3), clinopyroxene (Fs10.9-11.6Wo38.6-35.9, N = 2).

Classification: Ordinary chondrite (L6, anomalous, metal-poor, vesicular). The presence of abundant vesicles and the paucity of metal are anomalous features in comparison with typical L6 chondrites. Although this specimen contains rare remnant chondrules, in most other respects it closely resembles NWA 11253, and may be related to or even paired with that heterogeneous meteorite.

Specimens: 20.4 g including one polished thin section at UWB; remainder with GHupé.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2018 Jan
Mass (g):335.4
Shock stage:S6
Weathering grade:W1
Fayalite (mol%):24.4-25.0
Ferrosilite (mol%):18.9-20.5
Wollastonite (mol%):4.0-4.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.4
Type spec location:UWB
Main mass:G. Hupe
Comments:Work name GH-469; submitted by A. Irving
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)
Hupe: (old address—now see GHupé or AHupé) G. and A. Hupe, 2616 Lake Youngs Court SE, Renton, WA 98058., United States (private address)
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Public domain photographs:
A. Irving   

     This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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