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Northwest Africa 10704
Basic information Name: Northwest Africa 10704
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10704
Observed fall: No
Year found: 2016
Country: Western Sahara
Mass:help 156 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 516 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 20 Jun 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10704 (NWA 10704)

Western Sahara

Purchased: Jan 2016

Classification: Ureilite

History: Purchased in January 2016; reportedly found in El-Hamada, November 2015.

Physical characteristics: Single stone with no fusion crust. A saw-cut surface shows a coarse-grained mosaic of dark-gray silicate grains.

Petrography: (C. Agee, UNM) Olivine is the major mineral in this meteorite. Minor pigeonite is present. Olivines show reduced rims typical of ureilites. Graphite and metal occupy grain boundaries. Most olivine grains range in size from 1000-1500 μm.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine rim Fa14.0, Fe/Mn=30, n=1; Olivine cores Fa21.3±1.1, Fe/Mn=50±3, Cr2O3=0.55±0.02 (wt%), CaO=0.32±0.02 (wt%), n=7; Pigeonite Fs18.5±0.1Wo10.2±0.0, Fe/Mn=28±1, n=2.

Classification: Ureilite

Specimens: 20.08 g including a probe mount on deposit at UNM, DPitt holds the main mass.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P Jan 2016
Mass (g):156
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):21.3±1.1
Ferrosilite (mol%):18.5±0.1
Wollastonite (mol%):10.2±0.0
Classifier:C. Agee, UNM
Type spec mass (g):20.08
Type spec location:UNM
Main mass:DPitt
Comments:Field name MCVICH033; submitted by C. Agee, UNM
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography:

Western Sahara
Coordinates:Unknown.

Statistics:
     This is 1 of 210 approved meteorites from Western Sahara (plus 20 unapproved names)

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