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Northwest Africa 15061
Basic information Name: Northwest Africa 15061
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15061
Observed fall: No
Year found: 2022
Country: Mali
Mass:help 5.72 kg
Classification
  history:
Recommended:  Winonaite    [explanation]

This is 1 of 76 approved meteorites (plus 2 unapproved names) classified as Winonaite.   [show all]
Search for other: Primitive achondrites, Winonaites
Comments: Approved 5 Jul 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15061 (NWA 15061)

Mali

Purchased: 2022 Mar

Classification: Primitive achondrite (Winonaite)

History: Reportedly found by Saharawi meteorite hunters in an area called Unan (~120 km SE of Taoudenni), Mali, in February 2022.

Petrography: (K. Metzler, IfP) Achondrite with metamorphic texture, showing frequent 120° triple junctions and partly poikilitic intergrowths. It consists of olivine, low-Ca pyroxene, Ca-rich pyroxene, plagioclase, and Fe-Ni metal. Much of the latter is terrestrially oxidized, forming veins of alteration products along grain boundaries and crosscutting mineral grains. Typical grain sizes are between 200 and 500 µm, but low-Ca pyroxene grains up to several mm occur. Accessories are troilite and daubréelite.

Geochemistry: Mineral compositions and geochemistry: The mean olivine composition is Fa1.2±0.1 (Fa1.0-1.4; n=9). The mean low-Ca pyroxene composition is Fs1.4±0.3Wo0.8±0.1 (Fs0.9-1.8Wo0.5-0.9; n=11). The mean composition of Ca-rich pyroxene is Fs0.9±0.3Wo40.9±0.5 (Fs0.5-1.4Wo40.3-41.6; n=10). The mean feldspar composition is An36.5±2.0Or0.1±0.1 (An32.1-38.6Or0.0-0.4; n=10).

Classification: Winonaite, based on texture, mineral chemistry and high abundance of Fe-Ni metal.

Specimens: 3292 g owned by Mohamed Ali Loud (largest piece 385 g). 2430 g owned by Miguel Ángel Contreras Gómez.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Mali
Date:P 2022 Mar
Mass (g):5722
Pieces:97
Class:Winonaite
Shock stage:M-S1
Weathering grade:high
Fayalite (mol%):1.2±0.1
Ferrosilite (mol%):1.4±0.3; 0.9±0.3
Wollastonite (mol%):0.8±0.1; 40.9±0.5
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Mohamed Ali Loud
Comments:Submitted by K. Metzler, IfP
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Domjan Svilkovic   
Public domain photographs:
Knut Metzler   
Geography:

Mali
Coordinates:Unknown.

Statistics:
     This is 1 of 79 approved meteorites from Mali (plus 2 unapproved names)

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