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Northwest Africa 8655
Basic information Name: Northwest Africa 8655
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8655
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 6.44 kg
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  LL5-melt breccia
Recommended:  LL5-melt breccia    [explanation]

This is 1 of 5 approved meteorites classified as LL5-melt breccia.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 22 Feb 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 8655 (NWA 8655)

(Northwest Africa)

Purchased: 2014 Oct

Classification: LL5-melt breccia

History: Purchased by Jason Phillips in Octber 2014 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Composed of recrystallized clasts containing sparse, relatively large (up to 2.8 mm) remnant chondrules within a dark, very fine-grained matrix. The very fine-grained matrix is black (almost opaque in thin section) and contains shred-like grains of metal and rounded troilite blebs (both indicative of melting). Shock stages were S2 for clasts, and S6 for matrix.

Geochemistry: Olivine (Fa26.8-27.1, N = 3), orthopyroxene (Fs21.7-22.0Wo1.4-1.3, N = 3), clinopyroxene (Fs7.3-7.7Wo45.9-46.0). Analyses were done for both clasts and matrix.

Classification: Ordinary chondrite (LL5 melt breccia).

Specimens: 38 g including one polished thin section at UWB; main mass with J. Phillips.

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2014 Oct
Mass (g):6439
Pieces:1
Class:LL5-melt breccia
Weathering grade:W1/2
Fayalite (mol%):26.8-27.1
Ferrosilite (mol%):21.7-22.0
Wollastonite (mol%):1.4-1.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):38
Type spec location:UWB
Main mass:J. Phillips
Comments:JP14-1; 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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
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:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8890 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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