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Northwest Africa 13652
Basic information Name: Northwest Africa 13652
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13652
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 390 g
Classification
  history:
Recommended:  Winonaite    [explanation]

This is 1 of 49 approved meteorites classified as Winonaite.   [show all]
Search for other: Primitive achondrites, Winonaites
Comments: Approved 16 Jan 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13652 (NWA 13652)

(Northwest Africa)

Purchased: 2020 Oct

Classification: Primitive achondrite (Winonaite)

History: The meteorite was purchased from a dealer in Tindouf, Algeria.

Physical characteristics: Dark brownish rock without fusion crust.

Petrography: The meteorite exhibts a recrystallized texture with abundant 120 degree triple junctions present at mineral grain boundaries. Predominant mineral phases are equigranular, 100 to 300 µm sized Mg-rich olivine, low-Ca pyroxene, augite, and sodic feldspar grains. Opaque phases are kamacite, taenite, and troilite which ocurr finely dispersed in the section studied. No relict chondrules were observed.

Geochemistry: olivine: Fa3.2±0.1 (Fa3.1-3.3 FeO/MnO=12±1, n=12); low-Ca pyroxene: Fs4.1±0.1Wo1.9±0.1 (Fs4.0-4.3Wo1.8-2.1, FeO/MnO=11±1, n=13); Ca-pyroxene: Fs1.4±0.1Wo45.8±1.3 (Fs1.2-1.7Wo44.6-48.1, FeO/MnO=9±2, n=12); feldspar: An22.0±0.4Ab75.7±0.4Or2.3±0.2, n=11

Classification: Winonaite; likely paired with NWA 13624

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Tindouf, Algeria
Date:P 2020 Oct
Mass (g):390
Pieces:6
Class:Winonaite
Shock stage:S1
Weathering grade:low
Fayalite (mol%):3.2
Ferrosilite (mol%):4.1; 1.4
Wollastonite (mol%):1.9; 45.8
Classifier:A. Greshake, MNB
Type spec mass (g):48
Type spec location:MNB
Main mass:Salamu Hamad
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. 110, in preparation (2021)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7579 approved meteorites from (Northwest Africa) (plus 1969 unapproved names)

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