header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 14 Oct 2020
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Northwest Africa 7285
Basic information Name: Northwest Africa 7285
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7285
Observed fall: No
Year found: 2011
Country: Morocco
Mass:help 220 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 472 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 17 Jul 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 7285 (NWA 7285)

Morocco

Purchased: 2011 Dec 11

Classification: HED achondrite (Eucrite)

History: Purchased by Sean Tutorow in Morocco, December 11, 2011.

Physical characteristics: Single stone, partial dark fusion crust, light-brown exterior from desert weathering, saw cut reveals fresh, light gray, fine-grained phaneritic texture.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows approximately 55% pyroxene, 40% plagioclase, minor ilmenite, silica, troilite, and Fe-metal (low Ni). Fine exsolution lamellae in some pyroxenes, plumose pyroxene-plagioclase textures also present.

Geochemistry: (C. Agee and N. Wilson, UNM) Mean pyroxene Fs51.5±8.0Wo15.5±9.8, Fe/Mn=33±1, n=13; pyroxenes lie on trend from Fs58.2Wo6.4 to Fs31.3Wo39.7, consistent with equilibrated eucrites. Plagioclase Or1.0±0.3Ab16.4±2.4An82.5±2.6, n=5.

Classification: Equilibrated eucrite, minor weathering.

Specimens: 21. 5 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 2011 Dec 11
Mass (g):220
Pieces:1
Class:Eucrite
Ferrosilite (mol%):51.5±8.0
Wollastonite (mol%):15.5±9.8
Classifier:C.Agee, UNM
Type spec mass (g):21.5
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:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Nuno Chaves   
Geography:

Morocco
Coordinates:Unknown.

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

Direct link to this page