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Northwest Africa 12801
Basic information Name: Northwest Africa 12801
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12801
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 550 g
Classification
  history:
Recommended:  CK3    [explanation]

This is 1 of 42 approved meteorites classified as CK3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CK chondrites, CK3 chondrites, and CV-CK clan chondrites
Comments: Approved 18 Aug 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12801 (NWA 12801)

(Northwest Africa)

Purchased: 2018

Classification: Carbonaceous chondrite (CK3)

History: The meteorite was purchased from a local meteorite dealer in Guelmim, Morocco.

Physical characteristics: Two dark-grayish fragments without fusion crust.

Petrography: The meteorite displays a brownish interior and is composed of several well defined chondrules (mean diameter about 700 μm) set into abundant recrystallized matrix. Compositionally equilibrated Fe-rich olivine is the dominant mineral phase in the matrix. Olivine and low-Ca pyroxene are compositionally zoned in most chondrules. Minor phases include intermediate plagioclase, Ca-pyroxene, and troilite. Cr-rich magnetite is abundant; metal was not detected. The meteorite appears brecciated.

Geochemistry: unequilibrated olivine: Fa20.9±4.4 (Fa15.0-25.5, n=11); unequilibrated low-Ca pyroxene: Fs14.9±7.8Wo0.4±0.1 (Fs3.8-23.3Wo0.3-0.5, n=14); Fe-rich matrix olivine: Fa29.5±0.9, FeO/MnO=115±13, n=13; low-Ca matrix pyroxene: Fs24.3±0.7Wo1.0±0.2, n=18; matrix Ca-pyroxene: Fs10.0±1.4Wo43.6±4.6, n=5; matrix feldspar: An25.7±7.5Ab69.3±6.3Or5.1±1.4, n=6

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Guelmim, Morocco
Date:P 2018
Mass (g):550
Pieces:2
Class:CK3
Shock stage:S2
Weathering grade:moderate
Fayalite (mol%):20.9; 29.5
Ferrosilite (mol%):14.9; 24.3; 10.0
Wollastonite (mol%):0.4; 1.0; 43.6
Classifier:A. Greshake, MNB
Type spec mass (g):21.5
Type spec location:MNB
Main mass:Marcin Cimala
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
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 6916 approved meteorites from (Northwest Africa) (plus 2027 unapproved names)

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