Meteoritical Bulletin: Entry for Northwest Africa 13652

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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: 390 g

Classification
history:

Recommended:

Winonaite [explanation]

This is 1 of 71 approved meteorites classified as Winonaite. [show all]
Search for other: Primitive achondrites, Winonaites

Comments:

Approved 16 Jan 2021

Writeup

help

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: Fa_3.2±0.1(Fa_3.1-3.3FeO/MnO=12±1, n=12); low-Ca pyroxene: Fs_4.1±0.1Wo_1.9±0.1(Fs_4.0-4.3Wo_1.8-2.1, FeO/MnO=11±1, n=13); Ca-pyroxene: Fs_1.4±0.1Wo_45.8±1.3(Fs_1.2-1.7Wo_44.6-48.1, FeO/MnO=9±2, n=12); feldspar: An_22.0±0.4Ab_75.7±0.4Or_2.3±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)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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