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 7653
Basic information Name: Northwest Africa 7653
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7653
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 106 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  L5
Recommended:  L5    [explanation]

This is 1 of 6696 approved meteorites (plus 4 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 15 Jan 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7653 (NWA 7653)

Morocco

Purchased: Aug 2012

Classification: Ordinary chondrite (L5)

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

Physical characteristics: Single stone, dark brown weathered exterior, saw-cut reveals ordinary chondrite breccia blocks, up to 2 cm, bounded by dark melt veins and pockets, fine-grained metal/sulfides.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a texturally equilibrated chondrite, but also fine-grained recrystallization of chondrules from shock, ubiquitous troilite, taenite, kamacite, and plagioclase.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa23.6±0.6, Fe/Mn=48±3, n=15; low-Ca pyroxene Fs21.2±0.8Wo1.7±0.3, Fe/Mn=30±2, n=11; high-Ca pyroxene Fs8.3±0.5Wo44.3±0.4, Fe/Mn=23±3, n=4.

Classification: Ordinary chondrite (L5), breccia, weathering grade W1.

Specimens: 21 g including a probe mount on deposit at UNM, Adam Bates holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P Aug 2012
Mass (g):106
Pieces:1
Class:L5
Weathering grade:W1
Fayalite (mol%):23.6±0.6
Ferrosilite (mol%):21.2±0.8
Wollastonite (mol%):1.7±0.3
Classifier:C. Agee, UNM
Type spec mass (g):22
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. 102, MAPS 50, 1662, 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