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Northwest Africa 12650
Basic information Name: Northwest Africa 12650
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12650
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 1061 g
Classification
  history:
Recommended:  LL4    [explanation]

This is 1 of 368 approved meteorites classified as LL4.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 17 Jun 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12650 (NWA 12650)

(Northwest Africa)

Purchased: 2018 Jul

Classification: Ordinary chondrite (LL4)

History: Purchased by Ben Hoefnagels in July 2018 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Fairly closely packed, relatively large chondrules occur within a finer matrix containing altered metal, chlorapatite and merrillite.

Geochemistry: Olivine (Fa27.0±0.0, N = 3), low-Ca pyroxene (Fs21.0±2.0Wo1.1±0.6 (range Fs17.4-22.3Wo1.8-0.6), N = 5), subcalcic augite (Fs14.0Wo27.8). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.81.

Classification: Ordinary chondrite (LL4).

Specimens: 51 g including one polished thin section at UWB; remainder with Mr. B. Hoefnagels.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2018 Jul
Mass (g):1061
Pieces:1
Class:LL4
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):27.0±0.0
Ferrosilite (mol%):21.0±2.0
Wollastonite (mol%):1.1±0.6
Classifier:A. Irving & P. Carpenter
Type spec mass (g):51
Type spec location:UWB
Main mass:B. Hoefnagels
Comments:Work name BH159; 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:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7328 approved meteorites from (Northwest Africa) (plus 1973 unapproved names)

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