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:
Include past classifications in search
Limit to approved meteorite names
Search text:  
Northwest Africa 7254
Basic information Name: Northwest Africa 7254
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7254
Observed fall: No
Year found: 2004
Country: Morocco
Mass:help 1447 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  L3.4
Recommended:  L3.4    [explanation]

This is 1 of 51 approved meteorites classified as L3.4.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 24 Apr 2012
Writeuphelp
Writeup from MB 100:

Northwest Africa 7254 (NWA 7254)

Morocco

Purchased: 2004

Classification: Ordinary chondrite (L3.4)

History: Purchased by Blaine Reed in Denver, 2004.

Physical characteristics: Saw cut reveals numerous chondrules of variable sizes and fine-grained metal set in dark-brown matrix. Brecciated. A distinct 2-cm rectangular clast with exotic granoblastic lithology was observed.

Petrography: (C. Agee, UNM) Microprobe examination shows a variety of chondrules POP and BO, about 25% of metal oxidized. Exotic clast containing olivine and augite, small amount of kamacite, and no chondrules.

Geochemistry: (C. Agee and N. Wilson, UNM) Olivine mean Fa20.9±10.0, range Fa0.5-34.0, PMD=45%, Fe/Mn=59±18, Cr2O3=0.14±0.23 wt%, n=37; low-Ca pyroxene Fs16.4±9.4, range Fs2.5-Fa35.4, PMD=63%, Wo1.8±1.8, Fe/Mn=26±16, n=24. Exotic clast: olivine Fa41.6±5.9, Fe/Mn=70±10, n=5.

Classification: Ordinary chondrite (L3.4) weathering grade W2. Exotic brachinite-like clast.

Specimens: 22.8 g including a probe mount on deposit at UNM, Reed holds the main mass.

Data from:
  MB100
  Table 1
  Line 1697:
Place of purchase:Denver
Date:P 2004
Mass (g):1447
Pieces:1
Class:L3.4
Weathering grade:W2
Fayalite (mol%):20.9±10.0
Ferrosilite (mol%):16.4±9.4
Wollastonite (mol%):1.8±1.8
Classifier:C. Agee, UNM
Type spec mass (g):22.8
Type spec location:UNM
Main mass:Reed
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)
Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
Find references in Google Scholar:
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