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Northwest Africa 10173
Basic information Name: Northwest Africa 10173
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10173
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 347 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 508 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 30 Jun 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 10173 (NWA 10173)

(Northwest Africa)

Purchased: 2015 Feb

Classification: HED achondrite (Eucrite)

History: Purchased by Darryl Pitt in February 2015 from a dealer in Mauritania.

Petrography: (A. Irving and S. Kuehner, UWS) Fresh fragmental breccia composed mainly of angular mineral clasts plus sparse basaltic eucrite lithic clasts (with variable grainsize) set in a finer grained matrix. Minerals are exsolved and unexsolved pigeonite, calcic plagioclase, silica polymorph, Ti-chromite, ilmenite and troilite.

Geochemistry: Host orthopyroxene (Fs56.5-60.6Wo2.7-1.8, FeO/MnO = 31-33, N = 3), clinopyroxene exsolution lamellae (Fs22.4-25.8Wo45.6-44.7, FeO/MnO = 29-35, N = 3).

Classification: Eucrite (breccia).

Specimens: 20.8 g including one polished thin section at UWB. The remainder is held by DPitt.

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2015 Feb
Mass (g):346.7
Pieces:1
Class:Eucrite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):56.5-60.6; 22.4-25.8
Wollastonite (mol%):2.7-1.8; 45.6-44.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.8
Type spec location:UWB
Main mass:D. Pitt
Comments:MAC 117; 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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7820 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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