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Northwest Africa 14470
Basic information Name: Northwest Africa 14470
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14470
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1260 g
Classification
  history:
Recommended:  LL3-melt breccia    [explanation]

This is the only approved meteorite classified as LL3-melt breccia.
Search for other: LL chondrites, LL chondrites (type 3), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 20 Dec 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14470 (NWA 14470)

(Northwest Africa)

Purchased: 2021 Aug

Classification: LL3-melt breccia

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania, in August, 2021.

Physical characteristics: Dark grayish rock with mostly sandblasted surface.

Petrography: Chondritic melt breccia composed of up to 4 cm sized type 3 clasts set into abundant black shock melt. Type 3 fragments show a chondritic texture with well-defined, mostly rounded and partly packed chondrules with an apparent mean diameter of about 0.7 mm. The fine-grained shock melt is mostly recrystallized and contains entrained chondrule and mineral fragments partly with resorption textures as well as characteristic FeNi metal and sulfide spherules.

Classification: LL3-melt breccia. LL group from magnetic susceptibility (Rochette et al., 2003)

Bibliography:
  • Rochette P., Sagnotti L., Bourot-Denise M., Consolmagno G., Folco L., Gattacceca J., Osete M.L., and Pesonen L. (2003) Magnetic classification of stony meteorites: 1. Ordinary chondrites. Meteorit. Planet. Sci. 38 251-268. (link)
Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P 2021 Aug
Mass (g):1260
Pieces:1
Class:LL3-melt breccia
Shock stage:S4
Weathering grade:W1
Fayalite (mol%):22.5±10.0 (0.7-41.4, n=21)
Ferrosilite (mol%):17.1±5.8 (8.1-25.5, n=23)
Wollastonite (mol%):1.4±1.3 (0.3-4.3, n=23)
Magnetic suscept.:4.49
Classifier:A. Greshake, MNB
Type spec mass (g):31.4
Type spec location:MNB
Main mass:Salamu Ali
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. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8136 approved meteorites from (Northwest Africa) (plus 1942 unapproved names)

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