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Northwest Africa 7516
Basic information Name: Northwest Africa 7516
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7516
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 77 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 459 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 18 Nov 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 7516 (NWA 7516)

Morocco

Purchased: Aug 2012

Classification: HED achondrite (Eucrite)

History: Purchased by Adam Bates from a meteorite dealer in Morocco, August, 2012.

Physical characteristics: Single stone, shiny black fusion crust. Saw cut reveals, fresh, light gray, fine-grained texture; friable.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous zoned pyroxenes, with a minor amount of generally smaller pyroxenes with exsolution lamellae. Ophitic to granular to cataclastic texure, approximately 60% pyroxene and 30% plagioclase. Scattered mesostasis, silica, chromite, ilmenite, troilite, and low-Ni iron metal; some fayalitic olivine on pyroxene grain boundaries.

Geochemistry: (C. Agee and M. Spilde, UNM) Pyroxene Fs43.1±7.7Wo8.8±4.7, Fe/Mn=32±2, n=32; plagioclase An90.0±11.9, n=4.

Classification: Achondrite (eucrite), unequilibrated basaltic eucrite, zoned pyroxenes show a Pasamonte type trend, also a few pyroxenes with exsolution lamellae suggest the presence of a second, equilibrated, eucrite lithology.

Specimens: 15.4 g including a probe mount on deposit at UNM, Adam Bates holds the main mass.

Data from:
  MB101
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P Aug 2012
Mass (g):77
Pieces:1
Class:Eucrite
Ferrosilite (mol%):43.1±7.7
Wollastonite (mol%):8.8±4.7
Classifier:C. Agee, UNM
Type spec mass (g):15.4
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. 101, MAPS 50, 1661, September 2015
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1460 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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