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Northwest Africa 11831
Basic information Name: Northwest Africa 11831
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11831
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 65 g
Classification
  history:
Recommended:  LL3-6    [explanation]

This is 1 of 27 approved meteorites classified as LL3-6.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 4 Jul 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11831 (NWA 11831)

(Northwest Africa)

Purchased: 2018

Classification: Ordinary chondrite (LL3-6)

History: The meteorite was purchased from a local meteorite dealer in Morocco.

Physical characteristics: Dark greyish individual with some fusion crust.

Petrography: The meteorite is a chondritic breccia consisting of clastic LL3 type matrix with embedded up to 2 mm sized LL6 clasts. Plagioclase grain size in type 6 clasts is about 60 µm. Chondrules have a mean diameter of about 0.8 mm.

Geochemistry: type 3 lithology: olivine: Fa14.9±8.5 (Fa5.0-31.9, n = 11); pyroxene: Fs11.9±7.6Wo0.8±0.9 (Fs2.0-24.7Wo0.3-4.6, n = 21); type 6 lithology: olivine: Fa30.7±0.1, n=12; pyroxene: Fs25.0±0.2Wo2.1±0.6, n=13

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2018
Mass (g):65
Pieces:1
Class:LL3-6
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):14.9; 30.7
Ferrosilite (mol%):11.9; 25.0
Wollastonite (mol%):0.8; 2.1
Classifier:A. Greshake, MNB
Type spec mass (g):13
Type spec location:MNB
Main mass:Philippe Schmitt-Kopplin
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
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 6325 approved meteorites from (Northwest Africa) (plus 2026 unapproved names)

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