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Northwest Africa 649
Basic information Name: Northwest Africa 649
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 649
Observed fall: No
Year found: 2000
Country: (Northwest Africa)
Mass:help 1690 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  L6
Recommended:  L6    [explanation]

This is 1 of 12780 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 30 Apr 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 649 (NWA 649)

(Northwest Africa)

Purchased: 2000

Classification: Ordinary chondrite (L6)

History: One stone weighing 1690 g was found in Morocco in 2000. Thomas Webb acquired 508 g of the sample from Michael Cottingham in 2000.

Physical characteristics: Stone is dark brown in color and has an oblate shape. The sample lacks fusion crust, but shows shallow regmaglypts and a dark desert patina.

Petrography: Description and classification (A. Love, App): Sample displays recrystallized chondritic texture composed of indistinct, chondrules (avg. diam. 1371 μm, N=11) and fragments in a recrystallized matrix. Sample contains minimally weathered FeNi and FeS metal occurring as discrete grains.

Geochemistry: (A.Love, App) Olivine Fa24.3±0.8, n=12; low Ca pyroxene Fs21.4±0.4Wo2.4±0.8, N=10.

Classification: Ordinary Chondrite (L6 S3 W2)

Specimens: 20.17 g 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):1690
Pieces:2
Class:L6
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):24.3±0.8
Ferrosilite (mol%):21.4±0.4
Wollastonite (mol%):2.35±0.8
Classifier:A. Love, App
Type spec mass (g):20.17
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 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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