Meteoritical Bulletin: Entry for Northwest Africa 13624

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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: 1161 g

Classification
history:

Recommended:

Winonaite [explanation]

This is 1 of 80 approved meteorites (plus 1 unapproved name) classified as Winonaite. [show all]
Search for other: Primitive achondrites, Winonaites

Comments:

Approved 12 Dec 2020

Writeup

help

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: Fa_3.2±0.1(Fa_3.2-3.4FeO/MnO=16±1, n=6); low-Ca pyroxene: Fs_3.9±0.1Wo_1.9±0.1(Fs_3.8-4.0Wo_1.7-1.9, FeO/MnO=14±2, n=5); Ca-pyroxene: Fs_1.1±0.1Wo_44.5±0.9(Fs_1.0-1.4Wo_43.2-45.9, FeO/MnO=9±3, n=6); feldspar: An_22.6±0.2Ab_74.9±0.3Or_2.5±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:

Credit	Photos
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 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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