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Northwest Africa 11788
Basic information Name: Northwest Africa 11788
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11788
Observed fall: No
Year found: 2017
Country: Mali
Mass:help 10.44 kg
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 199 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 26 May 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11788 (NWA 11788)

Mali

Purchased: 2017

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased in Mali by Dustin Dickens from anonymous meteorite hunter.

Physical characteristics: Many dark visually identical appearing pieces, with masses ranging from ~2 kg to many sub-g fragments, showing no fusion crust. Saw cut reveals a finely fragmental breccia with white feldspathic clasts set in a dark gray ground mass with metal flecks and minor vesiculation appearing throughout.

Petrography: (C. Agee, UNM) This meteorite is a breccia of fragmental pyroxene, olivine, plagioclase grains. There are domains that are fine-grained and cataclastic with shock melt and vesicles.

Geochemistry: (C. Agee, UNM) olivine Fa: 31.2±9.4, Fe/Mn=95±7, n=12; clinopyroxene Fs36.0±10.0Wo22.2±8.8, Fe/Mn=60±5, n=12; plagioclase An93.0±1.8, n=7; Shock melt (20 _m defocused electron beam, proxy for bulk meteorite composition): SiO2=43.2±1.7, TiO2=0.46±0.20, Al2O3=24.2±3.6, Cr2O3=0.23±0.08, MgO=7.8±1.4, FeO=8.0±3.2, MnO=0.10±0.05, CaO=14.2±1.4, Na2O=0.35±0.23, K2O=0.08±0.05 (all wt%), n=4.

Classification: Lunar feldspathic breccia

Specimens: 28.9 g including a probe mount on deposit at UNM, Dustin Dickens holds the main mass.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Mali
Date:P 2017
Mass (g):10441
Pieces:Many
Class:Lunar (feldsp. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):31.2±9.4
Ferrosilite (mol%):36.0±10.0
Wollastonite (mol%):22.2±8.8
Classifier:C. Agee, UNM
Type spec mass (g):28.9
Type spec location:UNM
Main mass:Dustin Dickens
Comments:Field name DD-21; submitted by C. Agee, UNM
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Denis gourgues   
Geography:

Mali
Coordinates:Unknown.

Statistics:
     This is 1 of 42 approved meteorites from Mali (plus 1 unapproved name)

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