header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 5 Apr 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 7497
Basic information Name: Northwest Africa 7497
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7497
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 423 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  H4
Recommended:  H4    [explanation]

This is 1 of 5948 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 23 Oct 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 7497 (NWA 7497)

Morocco

Purchased: Aug 2012

Classification: Ordinary chondrite (H4)

History: Purchased by Adam Bates in Morocco, August 2012.

Physical characteristics: Single stone, dark weathered fusion crust, saw-cut reveals abundant fine-grained metal/sulfide, many small chondrules, but some up to 3mm.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a numerous PO, POP, and PP chondrules, most with mesostasis or glass, some fine grained plagioclase, moderate oxide veining.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa20.1±0.8, Fe/Mn=42±3, n=29; low-Ca pyroxene Fs14.2±4.2Wo1.0±0.8 Fe/Mn=25±8, n=30; high-Ca pyroxene Fs9.9Wo54.3, Fe/Mn=23. Ubiquitous troilite and kamacite, minor Cl-rich apatite.

Classification: Ordinary chondrite (H4), weathering grade W2.

Specimens: 21.4 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):423
Pieces:1
Class:H4
Weathering grade:W2
Fayalite (mol%):20.1±0.8
Ferrosilite (mol%):14.2±4.2
Wollastonite (mol%):1.0±0.8
Classifier:C. Agee, UNM
Type spec mass (g):21.4
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:
Find references in Google Scholar:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1466 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

Direct link to this page