header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 3 Jun 2023
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 7120
Basic information Name: Northwest Africa 7120
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7120
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 1604 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  L3-melt breccia
Recommended:  L3-melt breccia    [explanation]

This is 1 of 5 approved meteorites classified as L3-melt breccia.   [show all]
Search for other: L chondrites, L chondrites (type 3), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 23 Aug 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 7120 (NWA 7120)

(Northwest Africa)

Purchased: 2011 Oct

Classification: L3-melt breccia

History: Purchased by Hanno Strufe in 2011 October from a dealer at the Munich Mineral Show.

Physical characteristics: Fresh, fine-grained black specimen (1604 g), with abundant small irregular, fresh metal grains visible.

Petrography: The specimen consists of small unequilibrated chondrite clasts (with well-formed, rounded chondrules) plus shreds of intergrown metal+troilite in a fairly abundant quench-textured matrix. Some chondrules are rimmed by metal+sulfide. Metal consists of kamacite containing tiny taenite blebs. The matrix contains elongate pyroxenes with irregular Mg-rich cores and accessory chromite and chlorapatite.

Geochemistry: Olivine (Fa9.8; Fa15.0; Fa22.3; Fa25.0-25.5), orthopyroxene (core Fs3.7Wo0.3, rim Fs14.3Wo0.5).

Classification: Ordinary chondrite (L3-melt breccia). This specimen exhibits extensive textural and mineralogical disequilibrium between remnant unequilibrated chondrite clasts and the melt-textured matrix.

Specimens: A total of 25.8 g of type material is on deposit at UWB. The main mass is held by Strufe.

Data from:
  MB101
  Table 0
  Line 0:
Place of purchase:Munich
Date:P 2011 Oct
Mass (g):1604
Pieces:1
Class:L3-melt breccia
Shock stage:S5
Weathering grade:W0
Fayalite (mol%):9.8-25.5
Ferrosilite (mol%):3.7-14.3
Wollastonite (mol%):0.3-0.5
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):25.8
Type spec location:UWB
Main mass:H. Strufe
Comments:HS183; submitted by A. Irving
Institutions
   and collections		 UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
bphd                     
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

Direct link to this page