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Northwest Africa 15731
Basic information Name: Northwest Africa 15731
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15731
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 606 g
Classification
  history:
Recommended:  H3    [explanation]

This is 1 of 682 approved meteorites (plus 2 unapproved names) classified as H3.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 23 Feb 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15731 (NWA 15731)

(Northwest Africa)

Purchased: Dec 2022

Classification: Ordinary chondrite (H3)

History: Two stones (347 g and 259 g) reportedly found by meteorite hunters in Mauritania und subsequently purchased by Mr. Jasper Spencer from a Mauritanian dealer via Facebook Messenger.

Physical characteristics: Brownish stones with some fusion crust.

Petrography: The meteorite shows a chondritic texture with sharply defined, mostly rounded, and partly packed chondrules (apparent mean diameter about 0.4 mm) set in a light brownish matrix containing abundant metal and sulfides. Contains black melt clasts.

Geochemistry: Cr2O3 in ferroan olivine 0.04±0.04 wt%, n=31.

Classification: Ordinary chondrite (H3).

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P Dec 2022
Mass (g):606
Pieces:1
Class:H3
Shock stage:S1
Weathering grade:W1
Fayalite (mol%):14.9±8.6 (1.1-32.9, n=29)
Ferrosilite (mol%):11.6±8.2 (0.6-34.4, n=24)
Wollastonite (mol%):0.5±0.2 (0.3-1.2, n=24)
Magnetic suscept.:5.28
Classifier:A. Greshake, MNB
Type spec mass (g):44.9
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:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9042 approved meteorites from (Northwest Africa) (plus 1870 unapproved names)

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