header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 21 Feb 2021
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 13755
Basic information Name: Northwest Africa 13755
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13755
Observed fall: No
Year found: 2020
Country: Mali
Mass:help 125 g
Classification
  history:
Recommended:  LL3    [explanation]

This is 1 of 361 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 21 Feb 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13755 (NWA 13755)

Mali

Purchased: 2020 Jan

Classification: Ordinary chondrite (LL3)

History: Purchased by Mbark Arjdal in January 2020 from an dealer in Timbuktu, Mali.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed, closely-packed glass-bearing chondrules (apparent diameter 920±510 µm, N = 25) are set in a fine grained matrix containing stained kamacite, troilite, taenite and low-Ti chromite.

Geochemistry: Olivine (Fa24.9±14.7, range Fa2.9-38.2, N = 7), low-Ca pyroxene (Fs18.5±3.3Wo3.0±2.5, range Fs13.8-22.4Wo0.4-6.1, N = 5), subcalcic augite (Fs17.9Wo20.4; Fs22.2Wo34.0; N = 2). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.53.

Classification: Ordinary chondrite (LL3).

Specimens: 24.4 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Timbuktu, Mali
Date:P 2020 Jan
Mass (g):125
Pieces:1
Class:LL3
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):24.9±14.7
Ferrosilite (mol%):18.5±3.3
Wollastonite (mol%):3.0±2.5
Magnetic suscept.:3.53
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):24.2
Type spec location:UWB
Main mass:M. Arjdal
Finder:anonymous
Comments:Work name Arj ZM 370; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Mali
Coordinates:Unknown.

Statistics:
     This is 1 of 45 approved meteorites from Mali (plus 1 unapproved name)

Direct link to this page