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Northwest Africa 15850
Basic information Name: Northwest Africa 15850
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15850
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 1116 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 576 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 7 May 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15850 (NWA 15850)

(Northwest Africa)

Purchased: 2019 Nov

Classification: HED achondrite (Eucrite)

History: Reportedly found in Mauritania by nomads in 2019 and subsequently purchased by Mr. Jasper Spencer from a Mauritanian meteorite dealer via Facebook Messenger.

Physical characteristics: One stone with patchy fusion crust and some regmaglypts.

Petrography: Breccia composed of up to 1. 5 cm sized basaltic fragments showing coarse- and fine-grained intersertal texutes of lath-shaped calcic plagioclases and pyroxenes set in a fine-grained clastic mineral matrix. Pyroxenes show pronounced compositional zoning and not exsolved. Minor phases include fayalite, silica, chromite, ilmenite, FeS, and Ni-free metal. Contains recrystallized shock melt veins.

Geochemistry: zoned pyroxene: Fs41.9±11.0Wo10.7±6.3 (Fs31.7-62.1Wo5.0-23.8, FeO/MnO=25-31, n=15); fayalite: Fa82.8±0.1, FeO/MnO=38±1, n=3; plagioclase: An89.9±1.5 (An87.8-92.4, n=10).

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2019 Nov
Mass (g):1116
Pieces:1
Class:Eucrite
Shock stage:low
Weathering grade:low
Fayalite (mol%):82.8
Ferrosilite (mol%):41.9
Wollastonite (mol%):10.7
Classifier:A. Greshake, MNB
Type spec mass (g):37.6
Type spec location:MNB
Main mass:Jasper Spencer
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 9092 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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