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Northwest Africa 7195
Basic information Name: Northwest Africa 7195
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7195
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 60.1 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 516 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 29 May 2012
Writeuphelp
Writeup from MB 100:

Northwest Africa 7195 (NWA 7195)

(Northwest Africa)

Purchased: 2011 Jan

Classification: Ureilite

History: Purchased in January 2012 by Greg Hupé from a Moroccan dealer at the Tucson Gem and Mineral Show.

Physical characteristics: A single fresh, extremely hard, black stone weighing 60.1 g, which was very difficult to cut. Contains wispy shreds of fresh metal throughout.

Petrography: (A. Irving and S. Kuehner, UWS; T. Bunch, NAU) Composed of fairly large grains of olivine and low-Ca pyroxene with interstitial narrow metal-rich zones. Both olivine and pyroxene are completely recrystallized to aggregates of tiny polygonal subgrains.

Geochemistry: Olivine cores Fa18.3-18.6 (CaO=0.2 wt.%, Cr2O3=0.4 wt.%), rims Fa2.0-6.9; orthopyroxene Fs14.6Wo0.4; pigeonite Fs7.0Wo10.2, Fs6.5Wo21.8.

Classification: Achondrite (ureilite). The complete recrystallization of silicates is unusual among ureilites, and places this specimen with other very highly shocked ureilites such as NWA 6871.

Specimens: 12.1 g and one thin section are on deposit at UWS. GHupé holds the main mass.

Data from:
  MB100
  Table 1
  Line 1665:
Place of purchase:Tucson
Date:P 2011 Jan
Mass (g):60.1
Pieces:1
Class:Ureilite
Shock stage:high
Weathering grade:low
Fayalite (mol%):18.3
Ferrosilite (mol%):14.6; 7.0-6.5
Wollastonite (mol%):0.4; 10.2-21.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):12.1
Type spec location:UWS
Main mass:GHupé
Comments:Submitted by A. Irving
Institutions
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7035 approved meteorites from (Northwest Africa) (plus 2000 unapproved names)

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