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Northwest Africa 12786
Basic information Name: Northwest Africa 12786
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12786
Observed fall: No
Year found: 2018
Country: Morocco
Mass:help 422 g
Classification
  history:
Recommended:  L4-melt breccia    [explanation]

This is 1 of 6 approved meteorites classified as L4-melt breccia.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 18 Apr 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 12786 (NWA 12786)

Morocco

Purchased: 2018

Classification: Ordinary chondrite (L4, melt breccia)

History: (Ziyao Wang) Purchased by Ziyao Wang from Fayssal Mezgouri in Agadir, Morocco, Nov 2018.

Physical characteristics: (Ziyao Wang) one 422 g gray, flat stone

Petrography: (R. Bartoschewitz, Bart) meteorite show two lithologies: a) recrystallized matrix with chondrules of 0.2-1.5 mm (POP, PP, RP), metal and sulfide grains; and b) recrystallized fine grained (~50 µm) melt.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa24.2±0.9 (n=13); pyroxene Fs20.2±6.2Wo1.5±0.2 (n=7); chromite CRAL87, FFM88; Cl-apatite and merrillite. Kamacite Ni=3.6-6.4, Co=0.8-1.0 (n=3); taenite Ni=30-33, Co=0.3 (n=4) (all wt%); troilite. Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 4.57.

Classification: Ordinary chondrite (L4-melt breccia, W2)

Specimens: 21.9 g at Kiel on deposit, Ziyao Wang holds the main mass and 53 g with Bart.

Data from:
  MB109
  Table 0
  Line 0:
Origin or pseudonym:desert
Date:P 2018
Mass (g):422
Pieces:1
Class:L4-melt breccia
Weathering grade:W2
Fayalite (mol%):24.2±0.9 (n=13)
Ferrosilite (mol%):20.2±6.2 (n=7)
Wollastonite (mol%):1.5±0.2
Magnetic suscept.:4.57
Classifier:R. Bartoschewitz
Type spec mass (g):21.9
Type spec location:Kiel
Main mass:Ziyao Wang
Finder:anonymous
Comments:working name WZ119; submitted by R. Bartoschewitz
Institutions
   and collections
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
Bart: Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Wang Ziyao      
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1503 approved meteorites from Morocco (plus 22 unapproved names) (plus 1 impact crater)

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