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Northwest Africa 11695
Basic information Name: Northwest Africa 11695
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11695
Observed fall: No
Year found: 2017
Country: Algeria
Mass:help 350 g
Meteoritical Bulletin:  MB 107  (2018)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 336 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 27 Mar 2018
Writeup from MB 107:

Northwest Africa 11695 (NWA 11695)


Purchased: 2017

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased from a Moroccan meteorite dealer in 2017. Reportedly found by nomads in Algeria, March 2017.

Physical characteristics: Many identical appearing pieces. Weathered exterior, no fusion crust, saw cut reveals a fragmental breccia with numerous white feldspathic clasts set in a dark-gray ground mass.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows primarily feldspathic clasts and shock melt with lesser amounts of fragmental pyroxene and olivine. Z. Kerensky made 6 thin sections and also identified minor amounts of troilite and Fe-metal.

Geochemistry: (C. Agee, UNM) Olivine Fa35.7±10.2, Mn/Fe=90±8, n=15; pigeonite Fs30.0±6.8Wo10.1±7.6, Mn/Fe=56±6, n=9; augite Fs26.7±15.3Wo37.0±7.7, Mn/Fe=54±11, n=7; plagioclase An96.5±0.5, n=7; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=43.5±0.1, TiO2=0.19±0.01, Al2O3=28.9±0.1, Cr2O3=0.11±0.01, MgO=6.2±0.0, FeO=4.1±0.1, MnO=0.06±0.00, CaO=16.0±0.1, Na2O=0.34±0.01, K2O=0.02±0.00, n=3 (all wt%).

Classification: Lunar, feldspathic breccia

Specimens: 20.85 g on deposit at CSFK, probe mount at UNM, Zsolt Kereszty holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2017
Mass (g):350
Class:Lunar (feldsp. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):35.7±10.2
Ferrosilite (mol%):30.0±6.8, 26.7±15.3
Wollastonite (mol%):10.1±7.6, 37.0±7.7
Classifier:C. Agee, UNM
Type spec mass (g):20.85
Type spec location:CSFK
Main mass:Z. Kereszty
Comments:Field name ZK-13; submitted by C. Agee, UNM
   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)
CSFK: Research Center for Astronomy and Earth Sciences, H-1121 Budapest, Konkoly Thege Miklós út 15-17.l Hungary, Hungary (institutional address; updated 7 Apr 2015)
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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     This is 1 of 1356 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)

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