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Northwest Africa 15042
Basic information Name: Northwest Africa 15042
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15042
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 96 g
Classification
  history:
Recommended:  Mesosiderite    [explanation]

This is 1 of 234 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 5 Jul 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15042 (NWA 15042)

(Northwest Africa)

Purchased: 2022

Classification: Mesosiderite

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

Physical characteristics: Brownish fragment with minor fusion crust.

Petrography: The meteorite is composed of silicate (about 70 vol%) and moderately altered metallic (about 30 vol%) portions. The silica fraction is dominated by up to 2 mm sized weakly compositionally zoned low-Ca pyroxene and calcic plagioclase. Orthopyroxenes often contain blebby and lamellar augite exsolutions. Minor phases are silica, chromite, FeS, and merrillite. The metallic lithology consists of partly altered taenite and kamacite grains dispersed between the silicates.

Geochemistry: low-Ca pyroxene: Fs32.6±1.1Wo4.0±0.3 (Fs31.8-34.8Wo3.6-4.5, FeO/MnO=20-22, n=10); augite exsolutions: Fs16.6±0.8Wo40.6±0.8 (Fs15.5-18.1Wo39.4-41.6, FeO/MnO=17-18, n=10); calcic plagioclase: An91.6±0.8 (An89.7-92.5, n=10)

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2022
Mass (g):96
Pieces:1
Class:Mesosiderite
Shock stage:S1
Weathering grade:moderate
Ferrosilite (mol%):32.6; 16.6
Wollastonite (mol%):4.0; 40.6
Classifier:A. Greshake, MNB
Type spec mass (g):20.1
Type spec location:MNB
Main mass:Boulaouane Taleb Ahmed
Finder:Morocco
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. 111, in preparation (2022)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8777 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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