MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 21 Jul 2024
Search for: Search type: Search limits: Display: Publication:
Text help
Starts with
Sounds like
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Northwest Africa 10455
Basic information Name: Northwest Africa 10455
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10455
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 114 g
Meteoritical Bulletin:  MB 104  (2015)  L6
Recommended:  L6    [explanation]

This is 1 of 12995 approved meteorites (plus 11 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 15 Dec 2015
Writeup from MB 104:

Northwest Africa 10455 (NWA 10455)

(Northwest Africa)

Purchased: Feb 2004

Classification: Ordinary chondrite (L6)

History: Obtained by Edwin Thompson from a Moroccan Trader in Tucson, Arizona, at the February 2004 Tucson Gem and Mineral Show. Samples acquired by Cascadia in February 2004 and October 2015.

Physical characteristics: Exterior is partly black and shiny, and partly reddish. The cut face displays an obvious breccia texture with light brown stained clasts (up to 1 cm across) separated by dark veins of various thickness.

Petrography: Clasts with granoblastic texture and highly indistinct chondrule boundaries are enclosed in numerous dark melt veins up to 1 mm thick, which occupy up to ~30% of the rock. Maskelynite occurs close to veins. Feldspathic phases often >50 μm across. Metal grains are heavily weathered, but troilite is mostly unweathered. About 4% metal overall (remaining).

Geochemistry: (K. Farley and A. Ruzicka, Cascadia) Olivine (Fa26.0±0.4, Fe/Mn = 48.9±4.5 at., N = 20), low-Ca pyroxene (Fs21.7±0.4Wo1.6±0.2En76.7±0.4, Fe/Mn = 28.3±2.0 at., N = 13), feldspar (Ab74.2±6.7An16.0±3.4Or9.9±3.5, N = 7).

Classification: Veined L6 chondrite based on textures, mineral chemistry, and metal volume.

Specimens: Cascadia holds the entire sample, including 103.4 g in two pieces as well as two polished thin sections and two potted butts.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P Feb 2004
Mass (g):114
Shock stage:S4
Weathering grade:W2
Fayalite (mol%):26.0±0.4
Ferrosilite (mol%):21.7±0.4
Wollastonite (mol%):1.6±0.2
Classifier:K. Farley and A. Ruzicka, Cascadia
Type spec mass (g):103.4
Type spec location:Cascadia
Main mass:Cascadia
Comments:Lab number CML0153; submitted by A. Ruzicka
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
Thompson: Edwin Thompson, 5150 Dawn St., Lake Oswego, OR 97035, United States (private address)
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
Find references in Google Scholar:

     This is 1 of 9829 approved meteorites from (Northwest Africa) (plus 1851 unapproved names)

Direct link to this page