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Mdeïné 001
Basic information Name: Mdeïné 001
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2021
Country: Mauritania
Mass:help 10.5 kg
Classification
  history:
Recommended:  Mesosiderite    [explanation]

This is 1 of 240 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 23 Jul 2022
Writeuphelp
Writeup from MB 111:

Mdeïné 001        21º54.1452N, 7º27.7062W

Adrar, Mauritania

Purchased: 2021

Classification: Mesosiderite

History: A large number of samples ranging in size from 2-1121 g were found just inside the eastern border of the Adrar region of Mauritania. Adrián Contreras Gómez (CRATER meteorites) purchased the samples in Mauritania in June 2021.

Physical characteristics: Samples are dark colored and irregularly shaped. The cut face, shows the interior is composed of brecciated silicates and weathered FeNi metal.

Petrography: Description and classification (A. Love, App) Sample is a breccia composed of coarse-grained (avg. grain size=1626 μm, n=9), weakly zoned orthopyroxene clasts, finer-grained polycrystalline lithic fragments and rare impact melt clasts. These components are surrounded by a network of weathering veins and abundant, irregular-shaped, altered metal grains. Olivine shows developed reaction coronas. Pyroxenes in lithic fragments are exsolved. Additional minerals are: silica polymorph, troilite, chromite, phosphates (merrillite and apatite) and rare kamacite and taenite.

Geochemistry: (A. Love, App) Olivine (Fa31.2-36.1, Fe/Mn=34.2-32.3, n=2); low Ca pyroxene (Fs29.5±4.5Wo3.2±0.9, Fe/Mn=25.2±3.3, n=20); pigeonite (Fs58.3Wo6.4, Fe/Mn=30.8, n=1); high Ca pyroxene (Fs26.3±7.3Wo38.8±1.3, n=3); plagioclase (An94.8±1.8Or0.1±0.1, n=6).

Classification: Mesosiderite. Based on textures and mineral compositions, sample is a mesosiderite.

Specimens: Adrián Contreras Gómez (CRATER meteorites) holds the 1121 g main mass. A polished thin section and 2 individuals weighing 23.62 g are on deposit at App.

Data from:
  MB111
  Table 0
  Line 0:
State/Prov/County:Adrar
Place of purchase:Mauritania
Date:P 2021
Latitude:21º54.1452N
Longitude:7º27.7062W
Mass (g):10500
Pieces:many
Class:Mesosiderite
Shock stage:moderate
Weathering grade:moderate
Fayalite (mol%):31.2-36.1
Ferrosilite (mol%):29.5±4.5; 26.3±7.3
Wollastonite (mol%):3.2±0.9; 38.8±1.3
Classifier:A. Love, App
Type spec mass (g):23.62
Type spec location:App
Main mass:Adrián Contreras Gómez (CRATER Meteorites)
Comments:Submitted by Anthony Love
Institutions
   and collections		 App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Mauritania
Coordinates:
     Recommended::   (21° 54' 9"N, 7° 27' 42"W)

Statistics:
     This is 1 of 7 approved meteorites from Adrar, Mauritania (plus 1 impact crater)
     This is 1 of 191 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)
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