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Northwest Africa 14526
Basic information Name: Northwest Africa 14526
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14526
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 505 g
Classification
  history:
Recommended:  Lunar (basalt)    [explanation]

This is 1 of 22 approved meteorites classified as Lunar (basalt).   [show all]
Search for other: Lunar meteorites
Comments: Approved 15 Dec 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14526 (NWA 14526)

Northwest Africa

Purchased: 2021

Classification: Lunar meteorite (basalt)

History: Found in northwest Africa, purchased by Luc Labenne from meteorite dealer in 2021.

Physical characteristics: Single stone with a smooth to irregular exterior surface with indentations resembling large vesicles; patches of sandblasted fusion crust were also observed. Freshly broken surface reveals a fine-grained mix of dark gray and light brown grains, shiny maskelynite patches are present. Unbrecciated.

Petrography: (A. Ross and C. Agee, UNM) Backscattered electron images shown mm-size patches of igneous-zoned pyroxenes. Olivines are typically smaller grains up to 500 μm. Maskelynite makes up approximately 25% of the modal mineralogy, ubiquitous ilmenite ~3%, minor troilite, chromite and silica observed. Quench melt rock veins are present throughout.

Geochemistry: (A. Ross and C. Agee, UNM) Olivine Fa60.6±15.3, Fe/Mn=104±5, n=10; clinopyroxene Fs36.3±9.3Wo16.8±7.9, Fe/Mn=60±7, n=19; maskelynite An85.8±5.6Ab13.6±5.6, n=6. Quench melt SiO2=44.4±0.4, TiO2=2.7±0.2, Cr2O3=0.46±0.01, Al2O3=8.3±0.7, MgO=10.7±0.6, FeO=24.5±0.8, MnO=0.30±0.02, CaO=8.8±0.3, Na2O=0.30±0.04, K2O=0.13±0.04 (all wt%, 30 micron defocused beam), n=4. Clinopyroxene shows Fe-enrichment trends that are continuous from Mg-augite and Mg-pigeonite to subcalcic-ferroaugite.

Classification: Lunar (mare basalt). Based on the TiO2 content of quench melt this is meteorite is a low-Ti mare basalt (Giguere et al., 2000).

Specimens: 20 g including a probe mount on deposit at UNM, Labenne holds the main mass.

Bibliography:
  • Giguere T. A., Taylor G. J., Hawke B. R. and Lucey P. G. (2000) The titanium contents of lunar mare basalts. Meteorit. Planet. Sci. 35, 193–200. (link)
Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:(Northwest Africa)
Date:P 2021
Mass (g):505
Pieces:1
Class:Lunar (basalt)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):60.6±15.3
Ferrosilite (mol%):36.3±9.3
Wollastonite (mol%):16.8±7.9
Classifier:C. Agee, UNM
Type spec mass (g):20
Type spec location:UNM
Main mass:Labenne
Comments:Field name LL-1; submitted by C. Agee
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)
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 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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