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Northwest Africa 7190
Basic information Name: Northwest Africa 7190
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7190
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 5.3 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 170 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 30 Oct 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 7190 (NWA 7190)

(Northwest Africa)

Found: 2011 Aug

Classification: Lunar meteorite (feldspathic breccia)

History: Three small stones found in southern Morocco in 2011 August were purchased from a Moroccan dealer by Norbert Classen.

Physical characteristics: Three very similar dark-colored stones (3.11 g, 1.87 g and 0.296 g) exhibiting small white clasts in a glassy matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Vitric breccia composed of small mineral and lithic clasts in a very fine grained, heterogeneous glassy matrix. Minerals are anorthite, olivine, pigeonite, augite, ilmenite, troilite and minor kamacite.

Geochemistry: Olivine (Fa22.4-25.3, FeO/MnO = 90-97), orthopyroxene (Fs22.2Wo4.5, FeO/MnO = 54), pigeonite (Fs26.4Wo7.7, FeO/MnO = 67), augite (Fs11.2-11.3Wo43.8-46.2, FeO/MnO = 43-45). Bulk composition (R. Korotev, WUSL): mean values from INAA of subsamples are 6.0 wt.% FeO, 9.4 ppm Sc, 470 ppm Ni, 14.5 ppm La, 6.4 ppm Sm, 1.4 ppm Eu, 4.1 ppm Yb, 2.1 ppm Th.

Classification: Lunar (feldspathic breccia). Based on distinctive petrographic and bulk compositional attributes, these stones are likely paired with NWA 4936, NWA 5406, NWA 6221, NWA 6355, NWA 6470 and NWA 6570.

Specimens: 1.1 g is on deposit at UWB. Classen holds the main masses.

Data from:
  MB101
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:2011 Aug
Mass (g):5.28
Pieces:3
Class:Lunar (feldsp. breccia)
Shock stage:moderate
Weathering grade:low
Fayalite (mol%):22.4-25.3
Ferrosilite (mol%):22.2; 26.4; 11.2-11.3
Wollastonite (mol%):4.5; 7.7; 43.8-46.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):1.1
Type spec location:UWB
Main mass:N. Classen
Comments: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)
Classen: Norbert Classen, Am Lindenplatz 1, 79356 Eichstetten, Germany; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6752 approved meteorites from (Northwest Africa) (plus 2052 unapproved names)

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