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Northwest Africa 10712
Basic information Name: Northwest Africa 10712
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10712
Observed fall: No
Year found: 2016
Country: Western Sahara
Mass:help 409 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Eucrite-melt breccia
Recommended:  Eucrite-melt breccia    [explanation]

This is 1 of 23 approved meteorites classified as Eucrite-melt breccia.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 16 Oct 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10712 (NWA 10712)

Western Sahara

Purchased: Jan 2016

Classification: HED achondrite (Eucrite, melt breccia)

History: Purchased in January 2016; reportedly found near the Algerian border, December 2015.

Physical characteristics: Single stone with no fusion crust. A saw-cut surface shows a breccia with light colored clasts, up to 1 cm, set in a dark, shock-melt groundmass, a few small vesicles are present.

Petrography: (C. Agee, UNM) This meteorite is an equilibrated monomict basaltic meteorite with ~60% pyroxene, ~35% plagioclase. Most domains are very fine grained (~20 μm) with scattered larger fragmental pyroxenes and plagioclase up to ~700 μm. There are prominent shock melt veins throughout the meteorite. Chromite is ubiquitous.

Geochemistry: (C. Agee and M. Spilde, UNM) Low-Ca pyroxene Fs63.4±0.8Wo2.1±0.3, Fe/Mn=33±1, n=9; high-Ca pyroxene Fs27.6±0.3Wo43.2±0.1, Fe/Mn=34±2, n=4; plagioclase An89.2±2.0, n=5.

Classification: Eucrite (melt breccia)

Specimens: 30.52 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):409.3
Pieces:1
Class:Eucrite-melt breccia
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):63.4±0.8, 27.6±0.3
Wollastonite (mol%):2.1±0.3, 43.2±0.1
Classifier:C. Agee, UNM
Type spec mass (g):30.52
Type spec location:UNM
Main mass:DPitt
Comments:Field name MCVICH041; 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 203 approved meteorites from Western Sahara (plus 20 unapproved names)

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