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Northwest Africa 15626
Basic information Name: Northwest Africa 15626
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15626
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 800 g
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 29 Jan 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15626 (NWA 15626)

(Northwest Africa)

Purchased: 2022

Classification: Mesosiderite

History: The meteorite was purchased from a meteorite dealer in Algeria.

Physical characteristics: Several dark brownish rocks lacking fusion crust.

Petrography: The meteorite is a breccia composed of silicate (about 70 vol%) and strongly altered metallic (about 30 vol%) portions. The silicate fraction is dominated by up to 7 mm sized angular to subrounded low-Ca pyroxene and up to 1 mm calcic plagioclase grains in more fine-grained related mineral matrix. Orthopyroxenes are often weakly compositionally zoned and sometimes contain blebby and lamellar augite exsolutions. Minor phases are silica, chromite, and Cr-bearing troilite. The metal is almost completely altered to iron oxides and hydroxides; only few small kamacite grains were detected.

Geochemistry: low-Ca pyroxene: Fs27.4±1.9Wo2.1±0.1 (Fs24.3-29.2Wo1.9-2.2, FeO/MnO=25-31, n=15); augite exsolutions: Fs10.8±0.4Wo44.7±0.5 (Fs10.4-11.6Wo43.7-45.1, FeO/MnO=18-22, n=10); calcic plagioclase: An93.0±2.4 (An89.7-96.0, n=10)

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2022
Mass (g):800
Pieces:several
Class:Mesosiderite
Shock stage:low
Weathering grade:high
Ferrosilite (mol%):27.4; 10.8
Wollastonite (mol%):2.1; 44.7
Classifier:A. Greshake, MNB
Type spec mass (g):21.2
Type spec location:MNB
Main mass:Aadel Bousada
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. 112, in preparation (2023)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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