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Northwest Africa 13623
Basic information Name: Northwest Africa 13623
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13623
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 1889 g
Classification
  history:
Recommended:  Mesosiderite    [explanation]

This is 1 of 205 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 12 Dec 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13623 (NWA 13623)

(Northwest Africa)

Purchased: 2020 Sept

Classification: Mesosiderite

History: The meteorite was found near El Hank close to the border of Mali and Algeria and purchased by the main mass holders from a dealer in Morocco.

Physical characteristics: Three brownish fragments partly covered with fusion crust.

Petrography: Mesosiderite composed of silicate (about 60 vol%) and metallic (about 40 vol%) portions. In the metallic lithology kamacite dominates over taenite some of which altered to iron-oxides. The silica fraction is predominantly composed of up to 1 mm sized often compositionally zoned low-Ca pyroxene, less abundant Ca-pyroxene (mostly as blebs in orthopyroxene), calcic plagioclase, and minor silica and merrillite.

Geochemistry: zoned low-Ca pyroxene: Fs32.9±4.5Wo3.8±0.5 (Fs26.7-39.4Wo2.9-4.4, n=10, FeO/MnO=22±3); Ca-pyroxene: Fs19.8±0.5Wo39.9±0.1 (Fs19.0-20.4Wo38.2-41.2, n=5, FeO/MnO=17±1); calcic plagioclase: An94.1±0.5 (An93.7-94.8, n=5)

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020 Sept
Mass (g):1889
Pieces:3
Class:Mesosiderite
Shock stage:low
Weathering grade:moderate
Ferrosilite (mol%):32.9; 19.8
Wollastonite (mol%):3.8; 39.9
Classifier:A. Greshake, MNB
Type spec mass (g):24
Type spec location:MNB
Main mass:Hanno Strufe and Philippe Schmitt-Kopplin
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Volker Heinrich   
Wang Ziyao      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7655 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

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