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Northwest Africa 8472
Basic information Name: Northwest Africa 8472
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8472
Observed fall: No
Year found: 2014
Country: Morocco
Mass:help 391 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  LL3
Recommended:  LL3    [explanation]

This is 1 of 332 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 10 Jul 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8472 (NWA 8472)

Morocco

Purchased: May 2014

Classification: Ordinary chondrite (LL3)

History: Purchased from a dealer in Morocco in May of 2014 by A. Jonikas

Physical characteristics: one stone contianing weathered fusion crust, cut surface reveals very closely packed chondrules of various shapes and sizes and a small dark carbonaceous clast set in a grayish-brown matrix

Petrography: (A. Rubin, UCLA) Microprobe examination of a polished mount shows that chondrules lack clear glassy mesostasis. There are numerous grains of polysynthetically twinned low-Ca pyroxene. Chondrules are large, averaging ~600 μm in diameter, consistent with LL. There is very little metal present, consistent with LL. Even though the rock is W4 and most of the metal has been weathered, there is not that much limonite, indicating that there was little metal initially.

Geochemistry: Olivine Fa12.0±3.9 (Fa3.7-15.9, n=14); Low-Ca pyroxene Fs8.6±10.8Wo1.0±1.0 (Fs6.2-20.5, n=18).

Classification: Ordinary chondrite (LL3); subtype estimated >3.5 due to chondrules lacking clear glassy mesostases.

Specimens: 21.8 g type specimen including a probe mount, UCLA; A. Jonikas hold the main mass

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P May 2014
Mass (g):390.8
Pieces:1
Class:LL3
Shock stage:S2
Weathering grade:W4
Fayalite (mol%):12.0±3.9 (n=14)
Ferrosilite (mol%):8.6±10.8
Wollastonite (mol%):1.0±1.0 (n=18)
Classifier:A. Rubin, UCLA
Type spec mass (g):21.8
Type spec location:UCLA
Main mass:Aras Jonikas
Comments:AJ14-8; submitted by Aras Jonikas
Institutions
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
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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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Aeroliths Collection Theodossiou   
Anna Morris   
Denis gourgues         
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1450 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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