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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
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  H5
Recommended:  H5    [explanation]

This is 1 of 11568 approved meteorites (plus 23 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
Writeuphelp
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:
  MB103
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2000
Mass (g):280
Pieces:1
Class:H5
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
Finder:Anonymous
Comments:Submitted by Anthony Love
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)
Also see:
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Revision
  history:
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