header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 10 Jul 2019
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 7443
Basic information Name: Northwest Africa 7443
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7443
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 144.6 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  LL4
Recommended:  LL4    [explanation]

This is 1 of 357 approved meteorites classified as LL4.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 19 Nov 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7443 (NWA 7443)

(Northwest Africa)

Purchased: 2004

Classification: Ordinary chondrite (LL4)

Physical characteristics: Remnant fusion crust. Brown meteorite with a few surface depressions resulting from eroded chondrules. Chondrules up to 5 mm in diameter are visible on the exterior.

Petrography: (K. Guo, ROM): Chondrules (up to 2 mm) make up 70-80% of the thin section. Chondrule types include 40% porphyritic olivine, 40% porphyritic pyroxene. 3-5% barred olivine, 3-5% radial pyroxene and 3-5% granular. The majority of olivine grains exhibit sharp extinction. Metal and sulfides (60 to 70% oxidized) are 10-15% in volume.

Geochemistry: Olivine Fa27.6±0.5 (N=16), low-Ca pyroxene Fs18.9±4.9En89Wo2 (N=25), and high-Ca pyroxene Fs15.7±12.3En40Wo44 (N=5); PMD FeO olivine=0.95 and PMD FeO low-Ca pyroxene=22; σ-Cr2O3=0.27, mean Cr2O3=0.24.

Classification: Ordinary chondrite L4, S1, W3.

Specimens: A total of 144.56 g is on deposit at ROM.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2004
Mass (g):144.56
Pieces:2
Class:LL4
Shock stage:S1
Weathering grade:W2
Fayalite (mol%):27.6±0.5 (N=16)
Ferrosilite (mol%):18.9±4.9 (N=25)
Wollastonite (mol%):1.8±2.0 (N=25)
Classifier:K. Guo, ROM
Type spec mass (g):144.56
Type spec location:ROM
Main mass:ROM
Comments:Submitted by Brendt Hyde
Institutions
   and collections
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6781 approved meteorites from (Northwest Africa) (plus 2047 unapproved names)

Direct link to this page