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Northwest Africa 7913
Basic information Name: Northwest Africa 7913
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7913
Observed fall: No
Year found: 2013
Country: Morocco
Mass:help 95 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Eucrite-cm
Recommended:  Eucrite-cm    [explanation]

This is 1 of 45 approved meteorites classified as Eucrite-cm.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 27 Jul 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7913 (NWA 7913)

Morocco

Purchased: 2013

Classification: HED achondrite (Eucrite, cumulate)

History: Purchased by Adam Bates from a Moroccan meteorite dealer in 2013.

Physical characteristics: Single stone, brown weathered exterior, saw cut reveals dark-gray crystalline texture.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows grains (50 to 200 μm) of equilibrated pyroxene and plagioclase with numerous triple junctions, most pyroxene shows exsolution lamellae. Ubiquitous silica, chromite, and troilite.

Geochemistry: (C. Agee and L. Burkemper, UNM) Low Ca-pyroxene Fs41.4±4.2Wo7.0±6.7, Fe/Mn=27±1, n=17; augite Fs19.4±0.6, Fe/Mn=23±2, n=4; plagioclase An94.7±0.3, n=7.

Classification: HED Achondrite (Eucrite, cumulate), equilibrated Mg-rich eucrite, low-Ca pyroxenes show Ca-enrichment trend.

Specimens: 19 g including a probe mount on deposit at UNM, Adam Bates holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2013
Mass (g):95
Pieces:1
Class:Eucrite-cm
Ferrosilite (mol%):41.4±4.2, 19.4±0.9
Wollastonite (mol%):7.0±6.7, 41.7±0.6
Classifier:C. Agee, UNM
Type spec mass (g):19
Type spec location:UNM
Main mass:Adam Bates
Comments: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. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1417 approved meteorites from Morocco (plus 15 unapproved names) (plus 1 impact crater)

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