MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 16 May 2022
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 590
Basic information Name: Northwest Africa 590
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 590
Observed fall: No
Year found: 2000
Country: (Northwest Africa)
Mass:help 280 g
Meteoritical Bulletin:  MB 103  (2014)  H5
Recommended:  H5    [explanation]

This is 1 of 10851 approved meteorites (plus 19 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 30 Aug 2014
Writeup from MB 103:

Northwest Africa 590 (NWA 590)

(Northwest Africa)

Purchased: 2000

Classification: Ordinary chondrite (H5)

History: One subrounded stone containing desert patina weighing 280 g was found and sold to Michael Cottingham in Morocco. Thomas Webb acquired the sample in November 2000.

Physical characteristics: The stone is orange and has a subrounded shape. There is no relict fusion crust remaining on the exterior. The cut face of the interior of the stone is mottled tan and dark orange and shows unweathered flakes of metal.

Petrography: (A. Love, App): Sample displays recrystallized chondritic texture composed of relict, well-defined chondrules and fragments with an average diameter of 459 μm (116-1826 μm) set within a crystalline matrix. Some chondrules are deformed into elongate shapes but do not share a common orientation.

Geochemistry: (A. Love, App) Olivine Fa18.1±0.3, N=15; Low Ca pyroxene Fs17.0±0.5Wo2.2±0.7, N=12.

Classification: Ordinary chondrite (H5, S2, W2)

Specimens: A 20.94 g type specimen and 1 polished thin section are on deposit at App.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2000
Mass (g):280
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):18.1±0.3 (N=15)
Ferrosilite (mol%):17.0±0.5 (N=12)
Wollastonite (mol%):2.2±0.7
Classifier:A. Love, App
Type spec mass (g):20.94
Type spec location:App
Main mass:TWebb
Comments:Submitted by Anthony Love
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
TWebb: No contact information provided., United States (private address)
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
Find references in NASA ADS:
Find references in Google Scholar:

     This is 1 of 8394 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

Direct link to this page