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Northwest Africa 7485
Basic information Name: Northwest Africa 7485
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7485
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 360 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  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 8 Nov 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 7485 (NWA 7485)

Morocco

Purchased: May 2012

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Sean Tutorow in May 2012 from a Moroccan meteorite dealer.

Physical characteristics: Single stone, dark brown exterior, some weathered fusion crust, saw cut reveals patches of dark-gray and light-gray, slight oxidation.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a brecciated texture with approximately 60% pyroxene and 30% plagioclase, many pyroxenes with exsolution lamellae. Numerous shock melt veins up to 500 μm wide. Accessory silica, ilmenite, chromite, troilite, and low-Ni iron metal.

Geochemistry: (C. Agee and M. Spilde, UNM) Pyroxene Fs47.5±14.6Wo19.1±17.6, Fe/Mn=31±1, n=36, with equilibrated trend Fs61.0Wo1.8 to Fs27.0Wo43.2; plagioclase Or0.5±0.4Ab10.3±1.6An89.2±2.0, n=7.

Classification: Achondrite (eucrite, monomict). Equilibrated main group eucrite.

Specimens: 20.41 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

Data from:
  MB101
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P May 2012
Mass (g):360.12
Pieces:1
Class:Eucrite-mmict
Ferrosilite (mol%):47.5±14.6
Wollastonite (mol%):19.1±17.6
Classifier:C. Agee, UNM
Type spec mass (g):20.4
Type spec location:UNM
Main mass:Sean Tutorow
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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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Mike Markowitz   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1505 approved meteorites from Morocco (plus 22 unapproved names) (plus 1 impact crater)

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