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Northwest Africa 7905
Basic information Name: Northwest Africa 7905
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7905
Observed fall: No
Year found: 2004
Country: Morocco
Mass:help 1014 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  L5
Recommended:  L5    [explanation]

This is 1 of 6696 approved meteorites (plus 4 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 30 May 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7905 (NWA 7905)

Morocco

Purchased: 2004

Classification: Ordinary chondrite (L5)

History: Purchased on behalf of the University of Alberta Meteorite Collection from a Moroccan dealer by Stacey Gibb.

Physical characteristics: Complete, fusion-crusted individual with minor rust and caliche on the exterior.

Petrography: (P. Strickland, UAb). Petrographic microscope examination of thin section shows ~75 vol% chondrules, 20 vol% matrix, and 5 vol% metals/opaque minerals. Chondrules have an average diameter of 0.6 mm and display mostly radial pyroxene and porphyritic olivine-pyroxene textures. Interconnected shock-melt veins, irregular and planar fractures, mosaicism and undulatory extinction in olivine and pyroxene indicates moderate shock (S4).

Geochemistry: (C. Herd and P. Strickland, UAb). Olivine Fa22.2±0.7 (n=24); Low-Ca Pyroxene Fs19.8±1.2Wo1.3±0.4 (n=32).

Classification: Ordinary chondrite (L5).

Specimens: Main mass, including polished thin section, are on deposit at UAb.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2004
Mass (g):1014.1
Pieces:1
Class:L5
Shock stage:S4
Weathering grade:W1
Fayalite (mol%):22.2 ± 0.7 (n=24)
Ferrosilite (mol%):19.8 ± 1.2 (n=32)
Wollastonite (mol%):1.3 ± 0.4
Classifier:C. Herd and P. Strickland, UAb
Type spec mass (g):1014.1
Type spec location:UAb
Main mass:UAb
Comments:Submitted by C. Herd
Institutions
   and collections
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1460 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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