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Northwest Africa 15878
Basic information Name: Northwest Africa 15878
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15878
Observed fall: No
Year found: 2023
Country: (Northwest Africa)
Mass:help 70 kg
Classification
  history:
Meteoritical Bulletin:  MB 112  (2024)  OC4-melt breccia
Recommended:  OC4-melt breccia    [explanation]

This is 1 of 6 approved meteorites classified as OC4-melt breccia.   [show all]
Search for other: Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 30 Jul 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15878 (NWA 15878)

(Northwest Africa)

Purchased: 2023

Classification: Ordinary chondrite (type 4, melt breccia)

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

Physical characteristics: Many dark brownish fragments without fusion crust.

Petrography: Chondrite composed of chondritic portions surrounded by abundant finely recrystallized metal-rich melt rock veins and pockets. Chondritic portions have well-defined chondrules (apparent diameter about 600 µm) containing forsteritic olivine, magnesian orthopyroxene often overgrown by Ca-rich pyroxene plus sodic plagioclase set in a matrix containing abundant FeNi metal, taenite, chromite, and troilite. No secondary plagioclase detected.

Geochemistry: olivine: Fa8.3±0.5 (Fa7.6-8.9, FeO/MnO = 17-19, n=12), orthopyroxene: Fs8.5±0.4Wo0.6±0.2 (Fs8.1-9.7Wo0.3-0.8, FeO/MnO = 10-11, N = 14); augite: Fs3.7±0.3Wo44.1±2.4 (Fs3.3-4.0Wo40.4-46.7, FeO/MnO=7-10, N = 6)

Classification: OC4-melt breccia. Likely paired with Northwest Africa 15468

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2023
Mass (g):70000
Pieces:many
Class:OC4-melt breccia
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):8.3
Ferrosilite (mol%):8.5; 3.7
Wollastonite (mol%):0.6; 44.1
Magnetic suscept.:5.59
Classifier:A. Greshake, MNB
Type spec mass (g):56.1
Type spec location:MNB
Main mass:Mohamed Benzaki
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 Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Cartier C., Consolmagno G., Goodrich C., Greshake A., Gross J., Joy K. H., Miao B. and Zhang B. (2024) The Meteoritical Bulletin, no. 112. Meteoritics & Planetary Science 59, 1820–1823. ?
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9790 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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