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Northwest Africa 13624
Basic information Name: Northwest Africa 13624
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13624
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 1161 g
Classification
  history:
Recommended:  Winonaite    [explanation]

This is 1 of 60 approved meteorites classified as Winonaite.   [show all]
Search for other: Primitive achondrites, Winonaites
Comments: Approved 12 Dec 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13624 (NWA 13624)

(Northwest Africa)

Purchased: 2020 Oct

Classification: Primitive achondrite (Winonaite)

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

Physical characteristics: Three dark-brownish fragments partly covered with fusion crust. Large exposed metal areas are visible.

Petrography: The meteorite displays a recrystallized texture predominantly composed of typically 100 to 300 µm sized low-Ca pyroxene, forsteritic olivine, augite, and some sodic feldspar grains with enstatite being the most abundant mineral phase. 120 degree triple junctions are frequent; no chondrules were observed. Kamacite, taenite, and troilite are mostly finely dispersed throughout the meteorite and veins are only rarely found. Contains minor apatite.

Geochemistry: olivine: Fa3.2±0.1 (Fa3.2-3.4 FeO/MnO=16±1, n=6); low-Ca pyroxene: Fs3.9±0.1Wo1.9±0.1 (Fs3.8-4.0Wo1.7-1.9, FeO/MnO=14±2, n=5); Ca-pyroxene: Fs1.1±0.1Wo44.5±0.9 (Fs1.0-1.4Wo43.2-45.9, FeO/MnO=9±3, n=6); feldspar: An22.6±0.2Ab74.9±0.3Or2.5±0.1, n=3

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020 Oct
Mass (g):1161
Pieces:3
Class:Winonaite
Shock stage:S1
Weathering grade:low
Fayalite (mol%):3.2
Ferrosilite (mol%):3.9; 1.1
Wollastonite (mol%):1.9; 44.5
Classifier:A. Greshake, MNB
Type spec mass (g):25.6
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   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7885 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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