header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 2 Oct 2023
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Northwest Africa 7986
Basic information Name: Northwest Africa 7986
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7986
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 12.2 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 323 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 30 Nov 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7986 (NWA 7986)

(Northwest Africa)

Purchased: 2013 Jun

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Stefan Ralew in June 2013 from a Moroccan dealer at the Ensisheim Show.

Petrography: (A. Irving and S. Kuehner, UWS) Abundant partly devitrified, glassy matrix (with "swirly" texture) containing embedded small mineral and lithic clasts. Minerals are olivine, orthopyroxene, pigeonite, augite, anorthite, ilmenite, troilite and minor kamacite.

Geochemistry: Olivine (Fa33.4-34.5, FeO/MnO = 83-96), orthopyroxene (Fs34.7Wo2.3, FeO/MnO = 53), pigeonite (Fs25.8Wo6.3, FeO/MnO = 53), augite (Fs14.5Wo41.7; Fs33.5Wo39.5, FeO/MnO = 38-68), anorthite (An96.2-98.5Or0.1). Bulk composition (R. Korotev, WUSL): INAA of subsamples gave mean abundances of FeO 5.6 wt.%, and (in ppm) Sc 31, La 13.2, Sm 6.2, Eu 1.39, Yb 4.0, Th 1.9.

Classification: Lunar (feldspathic vitric breccia). On the basis of mineralogy, texture and bulk composition, this specimen is paired with NWA 4936, NWA 5406, NWA 6221, NWA 6355, NWA 6470, NWA 6570 and NWA 7190.

Specimens: 12.2 g are at UWB. The remainder is with Ralew.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Ensisheim
Date:P 2013 Jun
Mass (g):12.2
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):33.4-34.5
Ferrosilite (mol%):34.7; 25.8; 14.5; 33.5
Wollastonite (mol%):2.3; 6.3; 41.7; 39.5
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):12.2
Type spec location:UWB
Main mass:S. Ralew
Comments:RA13-2; submitted by A. Irving
Institutions
   and collections		 UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9370 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

Direct link to this page