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Taoudenni 003
Basic information Name: Taoudenni 003
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2023
Country: Mali
Mass:help 870 g
Classification
  history:
Recommended:  Achondrite-prim-ung    [explanation]

This is 1 of 8 approved meteorites classified as Achondrite-prim-ung.   [show all]
Search for other: Primitive achondrites, Ungrouped achondrites
Comments: Approved 14 Feb 2024
Writeuphelp
Writeup from MB 113:

Taoudenni 003        22°20’12’’N, 3°22’12’’W

Gao, Mali

Purchased: 2023 Feb

Classification: Ungrouped primitive achondrite

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

Geochemistry: Mineral compositions and geochemistry: Mean olivine composition: Fa1.2±0.1 (Fa1.0-1.3); Fe/Mn (at.): 4.4; n=11. Mean low-Ca pyroxene composition: Fs1.2±0.2 Wo0.9±0.1 (Fs0.8-1.5Wo0.8-1.1); Fe/Mn (at.): 2.3; n=11. Mean composition of Ca-rich pyroxene: Fs0.7±0.1Wo41.0±0.4 (Fs0.5-0.9Wo39.9-41.6); Fe/Mn (at.): 2.4; n=11. Mean feldspar composition: An37.4±1.6Or0.1±0.1 (An35.5-39.6Or0.0-0.4); n=11.

Classification: Ungrouped primitive achondrite. Possibly paired to Bir Ounane 001 and 003 due to identical texture and mineral compositions. This meteorite has many similarities with winonaites, but the distinctive feature is the plagioclase composition.

Data from:
  MB113
  Table 0
  Line 0:
State/Prov/County:Gao
Place of purchase:Mauritania
Date:P 2023 Feb
Latitude:22°20'12''N
Longitude:3°22'12''W
Mass (g):870
Pieces:Several
Class:Achondrite-prim-ung
Shock stage:M-S1
Weathering grade:high
Fayalite (mol%):1.2±0.1
Ferrosilite (mol%):1.2±0.2; 0.7±0.1
Wollastonite (mol%):0.9±0.1; 41.0±0.4
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Meteorite Museum & Shop, Stephan Decker, Oberwesel, Germany
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. 113, in preparation (2024)
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Photos:
CreditPhotos
Public domain photographs:
Knut Metzler      
Geography:

Mali
Coordinates:
     Recommended::   (22° 20' 12"N, 3° 22' 12"W)

Statistics:
     This is 1 of 33 approved meteorites from Gao, Mali (plus 1 unapproved name)
     This is 1 of 122 approved meteorites from Mali (plus 2 unapproved names)
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