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Northwest Africa 12829
Basic information Name: Northwest Africa 12829
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12829
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 19 g
Classification
  history:
Recommended:  CK3    [explanation]

This is 1 of 43 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 21 Sep 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12829 (NWA 12829)

(Northwest Africa)

Purchased: 2019

Classification: Carbonaceous chondrite (CK3)

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

Physical characteristics: Several black fragments with some fusion crust.

Petrography: The meteorite displays a dark brownish interior and is composed of several sharply defined chondrules (mean diameter about 900 μm) set into abundant recrystallized matrix. Olivine and low-Ca pyroxene are compositionally zoned in most chondrules and also in some matrix grains. Minor phases include intermediate plagioclase, Ca-pyroxene, and Fe,Ni-sulfides. Cr-rich magnetite is abundant; metal was not detected.

Geochemistry: olivine: Fa24.6±11.9 (Fa1.1-33.6, FeO/MnO= 139±17, n=25); low-Ca pyroxene: Fs12.9±10.2Wo1.5±1.2 (Fs1.4-26.5Wo0.9-4.4, n=20); Ca-pyroxene: Fs1.7±0.1Wo33.4±1.2, n=5; feldspar: An61.1±1.3Ab37.7±1.2Or1.3±0.1, n=6

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019
Mass (g):19
Pieces:several
Class:CK3
Shock stage:S2
Weathering grade:moderate
Fayalite (mol%):24.6
Ferrosilite (mol%):12.9; 1.7
Wollastonite (mol%):1.5; 33.4
Classifier:A. Greshake, MNB
Type spec mass (g):4
Type spec location:MNB
Main mass:Philippe Schmitt-Kopplin
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
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 7035 approved meteorites from (Northwest Africa) (plus 2000 unapproved names)

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