header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 10 Apr 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:
Include past classifications in search
Limit to approved meteorite names
Search text:  
Northwest Africa 13445
Basic information Name: Northwest Africa 13445
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13445
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 542 g
Classification
  history:
Recommended:  L4    [explanation]

This is 1 of 1715 approved meteorites (plus 4 unapproved names) classified as L4.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 10 Oct 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13445 (NWA 13445)

(Northwest Africa)

Purchased: 2019 Oct

Classification: Ordinary chondrite (L4)

History: Purchased by John Divelbiss in October 2019 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed chondrules are set in a relatively coarse grained recrystallized matrix containing taenite, altered kamacite (in places accompanied by lawrencite), troilite, taenite, low-Ti chromite and chlorapatite.

Geochemistry: Olivine (Fa23.6±0.2, range Fa23.3-23.8, N = 4), low-Ca pyroxene (Fs20.4±1.0Wo1.3±0.1, range Fs19.7-22.2Wo1.2-1.4, N = 5), augite (Fs6.4±0.1Wo46.2±0.3, range Fs6.3-6.5Wo46.0-46.4, N = 2).

Classification: Ordinary chondrite (L4).

Specimens: 27.1 g including one polished thin section at UWB; remainder with Mr. J. Divelbiss.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019 Oct
Mass (g):542
Pieces:1
Class:L4
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):23.6±0.2
Ferrosilite (mol%):20.4±1.0
Wollastonite (mol%):1.3±0.1
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):27.1
Type spec location:UWB
Main mass:J. Divelbiss
Comments:Work name JD20-4; 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. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7655 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

Direct link to this page