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Northwest Africa 8191
Basic information Name: Northwest Africa 8191
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8191
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 1100 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  L3
Recommended:  L3    [explanation]

This is 1 of 708 approved meteorites classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 24 Feb 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8191 (NWA 8191)

(Northwest Africa)

Purchased: 2013

Classification: Ordinary chondrite (L3)

Physical characteristics: Many pieces with clearly visible well-defined chondrules and a brownish wind-ablated surface. No fusion crust was found.

Petrography: (K. Metzler, IfP) Ordinary chondrite of low petrologic type consisting of about 80 vol% chondrules of various textural types, set in a fine-grained interchondrule matrix. Agglomeratic and compound chondrules can be observed. The mean apparent chondrule size is 540 μm (300-1000 μm; n=25). Accessory phases are FeNi metal and troilite, mostly residing outside of chondrules.

Geochemistry: (K. Metzler, IfP) SEM-EDX. The mean olivine composition is Fa20.0±12.5 (2.5-44; n=36); the mean low-Ca pyroxene composition is Fs10.1±7.9 (1-24; n=29)

Classification: L chondrite based on apparent chondrule size. Petrologic type <3.5 based on the variability of olivine composition (PMD >50)

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2013
Mass (g):1100
Pieces:many
Class:L3
Shock stage:S1
Weathering grade:W1-2
Fayalite (mol%):20.0±12.5 (2.5-44; n=36)
Ferrosilite (mol%):10.1±7.9 (1-24; n=29)
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:A.+M. Hmani
Comments:Submitted by K. Metzler
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Hmani: A. Hmani Moroccan Imports, 13 rue Jules Hardouin Mansart, 92600 Asnières, France (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Krzysztof Nowak   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7354 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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