header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 20 Jun 2022
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 7899
Basic information Name: Northwest Africa 7899
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7899
Observed fall: No
Year found: 2011
Country: Morocco
Mass:help 420 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  L6
Recommended:  L6    [explanation]

This is 1 of 12068 approved meteorites (plus 6 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 27 May 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7899 (NWA 7899)

Morocco

Purchased: 2011

Classification: Ordinary chondrite (L6)

History: Purchased by Blaine Reed in Denver, 2011.

Physical characteristics: Single stone, weathered fusion crust, saw cut reveals a coarse-grained breccia, numerous cm-sized clasts, dark shock veins, abundant fine-grained metal/sulfide.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous texturally equilibrated chondrules, but also regions of finely disseminated metal/sulfide and melt veins. Ubiquitous troilite and Fe,Ni metal.

Geochemistry: (C. Agee and L. Burkemper, UNM) Olivine Fa24.5±0.3, Fe/Mn=50±1, n=7; low-Ca pyroxene Fs21.7±0.5Wo1.7±0.4, Fe/Mn=30±1, n=6.

Classification: Ordinary chondrite (L6), weathering grade W1.

Specimens: 28.4 g including a probe mount on deposit at UNM, Reed holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Denver
Date:P 2011
Mass (g):420.2
Pieces:1
Class:L6
Weathering grade:W1
Fayalite (mol%):24.5±0.3
Ferrosilite (mol%):21.7±0.5
Wollastonite (mol%):1.7±0.4
Classifier:C. Agee, UNM
Type spec mass (g):28.4
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. 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 1847 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater)

Direct link to this page