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Northwest Africa 12834
Basic information Name: Northwest Africa 12834
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12834
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 440 g
Classification
  history:
Recommended:  H5    [explanation]

This is 1 of 9637 approved meteorites (plus 16 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 3 Aug 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12834 (NWA 12834)

(Northwest Africa)

Purchased: 2019 Feb

Classification: Ordinary chondrite (H5)

History: Purchased by Beat Booz in February 2019 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Moderately shocked breccia composed of closely packed clasts containing sparse, well-formed chondrules and relatively abundant stained metal. Silicates are noticeably shock darkened.

Geochemistry: Olivine (Fa20.0±0.3 (range Fa19.7-20.3), N = 3), low-Ca pyroxene (Fs17.1±0.2Wo1.3±0.1 (range Fs16.9-17.3Wo1.4-1.2), N = 3), high-Ca pyroxene (Fs5.2Wo47.0).

Classification: Ordinary chondrite (H5 breccia, shock-darkened).

Specimens: 21.0 g including one polished thin section at UWB; remainder with Mr. B. Booz.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019 Feb
Mass (g):440.1
Pieces:4
Class:H5
Shock stage:S4
Weathering grade:W2
Fayalite (mol%):20.0±0.3
Ferrosilite (mol%):17.1±0.2
Wollastonite (mol%):1.3±0.1
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):21.0
Type spec location:UWB
Main mass:B. Booz
Comments:Work name BB-84; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Beat Booz      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6877 approved meteorites from (Northwest Africa) (plus 2037 unapproved names)

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