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Northwest Africa 12697
Basic information Name: Northwest Africa 12697
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12697
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 140 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 174 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 4 Jul 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12697 (NWA 12697)

(Northwest Africa)

Purchased: 2018 Jun

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased from a mineral dealer in Marrakech, Morocco. Purportedly found near Tindouf, Algeria.

Petrography: (K. Metzler, IfP) Polymict achondritic breccia, consisting of mineral fragments (olivine, pyroxene, plagioclase) and lithic clasts (anorthosites, melt rocks, basalt), set in a nearly black matrix of fine-grained related debris. Intermingled are clast-rich melt particles with ill-defined outlines. Pyroxenes with and without exsolution lamellae are observed. Accessories are Fe,Ni metal, ilmenite, and troilite.

Geochemistry: Mineral compositions and geochemistry: Olivine: Fa35.4±8.0 (24.5-50.5); Fe/Mn (at.): 88-116; n=7. Pyroxene Fs35.3±11.8Wo12.3±5.9 (Fs22.3-53.0Wo3.9-21.8); Fe/Mn (at.): 44-87; n=11. Plagioclase An95.7±2.3 (An91.0-98.8); n=8.

Classification: Lunar feldspathic breccia

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Marrakech, Morocco
Date:P 2018 Jun
Mass (g):140
Pieces:Many
Class:Lunar (feldsp. breccia)
Shock stage:High
Weathering grade:Low
Fayalite (mol%):35.4±8.0
Ferrosilite (mol%):35.3±11.8
Wollastonite (mol%):12.3±5.9
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP, Munster
Main mass:Stephan Decker, Meteorite Museum, Oberwesel, Germany
Comments:Submitted by K. Metzler, IfP
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6877 approved meteorites from (Northwest Africa) (plus 2037 unapproved names)

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