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Northwest Africa 11705
Basic information Name: Northwest Africa 11705
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11705
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 11.04 kg
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  H4/5
Recommended:  H4/5    [explanation]

This is 1 of 501 approved meteorites classified as H4/5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 27 Mar 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11705 (NWA 11705)

(Northwest Africa)

Purchased: 2017 Mar

Classification: Ordinary chondrite (H4/5)

History: Purchased by Bob Falls in March 2017 from a dealer in Zagora, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Very fresh specimen containing some well-formed, relatively small chondrules in a recrystallized matrix containing merrillite, troilite, kamacite and taenite.

Geochemistry: Olivine (Fa15.6-15.7, N = 3), orthopyroxene (Fs14.0-14.1Wo0.6-0.7, N = 3), clinopyroxene (Fs9.9Wo33.9; Fs7.9Wo47.2; N = 2).

Classification: Ordinary chondrite (H4/5). The mafic silicates in this specimen are unusually magnesian in comparison to those in most H chondrites.

Specimens: 26.7 g including one polished thin section at UWB; remainder with Mr. R. Falls.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2017 Mar
Mass (g):11036
Pieces:1
Class:H4/5
Shock stage:S2
Weathering grade:W0/1
Fayalite (mol%):15.6-15.7
Ferrosilite (mol%):14.0-14.1
Wollastonite (mol%):0.6-0.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):26.7
Type spec location:UWB
Main mass:R. Falls
Comments:Work name BF17-21; 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. 107, MAPS 55, 460-462
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7308 approved meteorites from (Northwest Africa) (plus 1977 unapproved names)

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