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Northwest Africa 10905
Basic information Name: Northwest Africa 10905
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10905
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 149 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 238 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 26 Nov 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10905 (NWA 10905)

(Northwest Africa)

Purchased: 2016

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Morten Bilet, April 2016, from a Moroccan meteorite dealer.

Physical characteristics: Single stone with fusion crust, saw cut shows a fine-grained mix of white plagioclase and gray pyroxene. Mild brecciation.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows approximately 60% pyroxene and 35% plagioclase. Most grains are in the size range 200-500 μm, with a few plagioclase grains up to 1 mm.

Geochemistry: (C. Agee and M. Spilde, UNM) Low-Ca pyroxene Fs61.7±0.5Wo2.8±1.6, Fe/Mn=31±1, n=6, high-Ca pyroxene Fs33.5±8.1Wo36.4±9.1, Fe/Mn=31±2, n=7, plagioclase An87.4±2.0.

Classification: Monomict eucrite

Specimens: 20.7 g including a probe mount on deposit at UNM, Morten Bilet holds the main mass.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2016
Mass (g):149
Pieces:1
Class:Eucrite-mmict
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):61.7±0.5, 33.5±8.1
Wollastonite (mol%):2.8±1.6, 36.4±9.1
Classifier:C. Agee, UNM
Type spec mass (g):20.7
Type spec location:UNM
Main mass:Morten Bilet
Comments:MB-3; submitted by C. Agee
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)
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: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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