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Northwest Africa 11810
Basic information Name: Northwest Africa 11810
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11810
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 21 g
Meteoritical Bulletin:  MB 107  (2018)  H3
Recommended:  H3    [explanation]

This is 1 of 663 approved meteorites (plus 2 unapproved names) classified as H3.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 11 May 2018
Writeup from MB 107:

Northwest Africa 11810 (NWA 11810)

(Northwest Africa)

Purchased: 2005

Classification: Ordinary chondrite (H3)

History: Purchased by an anonymous collector from a dealer at the Munich Show in 2005, subsequently acquired by the Hollis Collection and donated to the Planetary Studies Foundation.

Petrography: (A. Irving and S. Kuehner, UWS) Closely packed chondrules (apparent diameter 400±160 µm, N = 20) are set in a sparse fine grained matrix containing merrillite, chlorapatite and stained metal. A single crystal clast of forsterite was observed.

Geochemistry: Olivine in chondrules (Fa2.0-37.0 Cr2O3 in ferroan examples 0.03-0.21 wt.%, mean 0.08±0.07 wt.%, N = 7), fosterite crystal (Fa0.7), orthopyroxene (Fs2.1-31.3Wo0.6-1.7 N = 3), pigeonite (Fs0.4Wo6.3), augite (Fs3.2Wo35.0; Fs6.2Wo45.5; N = 2). Magnetic susceptibility log χ (× 10-9 m3/kg) = 5.14.

Classification: Ordinary chondrite (H3).

Specimens: The entire specimen including a polished endcut is at PSF.

Data from:
  Table 0
  Line 0:
Place of purchase:Munich
Date:P 2005
Mass (g):21
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):2.0-37.0
Ferrosilite (mol%):2.1-31.3
Wollastonite (mol%):0.6-1.7
Magnetic suscept.:5.14
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21
Type spec location:PSF
Main mass:PSF
Comments:CHC18020; submitted by A. Irving
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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