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Northwest Africa 12787
Basic information Name: Northwest Africa 12787
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12787
Observed fall: No
Year found: 2019
Country: Morocco
Mass:help 196 g
Classification
  history:
Recommended:  H3    [explanation]

This is 1 of 632 approved meteorites (plus 2 unapproved names) classified as H3.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 21 Dec 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 12787 (NWA 12787)

Morocco

Purchased: 2019

Classification: Ordinary chondrite (H3)

History: (Ziyao Wang) Purchased by Wei Jiang from Sbai Mohamed at the mineral show in Beijing in Nov. 2018

Physical characteristics: (Ziyao Wang) 196 g brown stone with spherical appearance. Weathering is very significant, the appearance is broken, without fusion crust

Petrography: (R. Bartoschewitz, Bart) well-defined chondrules (0.1-1.5 mm, av. 0.5 mm) of various types (PO, PP, RP) and mineral fragments in a brown stained matrix, metal and sulfides are nearly complete oxidized.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa16.3±4.9 (n=25); pyroxene Fs18.8±5.0Wo0.9±0.8 (n=13); chromite CRAL91, FFM98. Kamacite Ni=4.6-6.1, Co=0.8 (n=3); taenite Ni=18.5, Co=0.5 (n=1) (all wt%). Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 5.06

Classification: Ordinary chondrite (H3, S2, W5)

Specimens: 22.3 g at Kiel on deposit, Wei Jiang holds the main mass, Ziyao Wang 18 g, and 65 g with Bart.

Data from:
  MB109
  Table 0
  Line 0:
Origin or pseudonym:desert
Date:P 2019
Mass (g):196
Pieces:1
Class:H3
Shock stage:S2
Weathering grade:W5
Fayalite (mol%):16.3±4.9 (n=25)
Ferrosilite (mol%):18.8±5.0 (n=13)
Wollastonite (mol%):0.9±0.8
Magnetic suscept.:5.06
Classifier:R. Bartoschewitz
Type spec mass (g):22.3
Type spec location:Kiel
Main mass:Wei Jiang
Finder:anonymous
Comments:working name WZ120; 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)
Beijing: Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China (institutional address; updated 16 Oct 2011)
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 1611 approved meteorites from Morocco (plus 22 unapproved names) (plus 1 impact crater)

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