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Northwest Africa 7547
Basic information Name: Northwest Africa 7547
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7547
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 176 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 230 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 12 Dec 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 7547 (NWA 7547)

Morocco

Purchased: Aug 2012

Classification: HED achondrite (Eucrite, monomict)

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

Physical characteristics: Single stone, weathered green-gray fusion crust. Saw cut reveals, fresh, light gray, fine-grained texture, some small dark clasts.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows two textural domains, a coarser grained host texture, and scattered very fine grained clasts up to 4mm. This is a monomict breccia based on similar pyroxene compositional range in both host and clasts. Pyroxenes show very fine exsolution lamellae, with some faint rim zonation. Ubiquitous silica, ilmenite, troilite, and minor zircon.

Geochemistry: (C. Agee and M. Spilde, UNM) EMPA. Pyroxene Fs53.2±7.3Wo12.1±9.2, Fe/Mn=34±2, n=20; plagioclase An90.0±4.8, n=4.

Classification: Achondrite (Eucrite-mmict), pyroxene compositions display Type 4 pyroxenes.

Specimens: 21.2 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):176
Pieces:1
Class:Eucrite-mmict
Ferrosilite (mol%):53.2±7.3
Wollastonite (mol%):12.1±9.2
Classifier:C. Agee, UNM
Type spec mass (g):21.2
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 1438 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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