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Northwest Africa 7515
Basic information Name: Northwest Africa 7515
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7515
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 160 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 7515 (NWA 7515)

Morocco

Purchased: Aug 2012

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Two matching stones, 79 g and 81 g, black shiny fusion crust. Broken surface reveals fine-grained, light-gray, texture; highly friable.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows approximately 60% pyroxene and 35% plagioclase, with subophitic to equigranular texture. Many pyroxene grains show exsolution lamellae. Accessory silica, ilmenite, chromite, and troilite.

Geochemistry: (C. Agee and M. Spilde, UNM) Low Ca-pyroxene Fs58.8±1.8Wo3.5±1.6, Fe/Mn=32±1, n=19; high Ca-pyroxene Fs34.5±7.2Wo32.3±8.7, Fe/Mn=32±2, n=11; plagioclase Or0.5±0.1Ab9.5±1.9An90.0±2.0, n=4.

Classification: Achondrite: equilibrated, main group, basaltic eucrite.

Specimens: 21 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):160
Pieces:2
Class:Eucrite
Ferrosilite (mol%):58.8±1.8, 34.5±7.2
Wollastonite (mol%):3.5±1.6, 32.3±8.7
Classifier:C. Agee, UNM
Type spec mass (g):21
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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