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Northwest Africa 12670
Basic information Name: Northwest Africa 12670
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12670
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 63 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 3 Sep 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12670 (NWA 12670)

(Northwest Africa)

Purchased: 2018

Classification: Carbonaceous chondrite (CK3)

History: The meteorite was purchased from a local meteorite dealer in Laayoune, Mauritania.

Physical characteristics: Dark grayish to greenish individual with some fusion crust.

Petrography: The meteorite is composed of well separated and sharply defined chondrules (apparent mean diameter about 700 μm) set into abundant matrix dominated by ferrous olivine, plagioclase, and Cr-rich magnetite. Minor phases include Ca-pyroxene and FeNi-sulfides. While olivine and pyroxene appear equilibrated in the matrix, they show strong compositional zoning in chondrules.

Geochemistry: Fe-rich matrix olivine: Fa33.0±0.3, FeO/MnO=127±11, n=12; unequilibrated olivine: Fa16.0±13.8 (Fa0.1-33.3, n=16); low-Ca pyroxene: Fs13.4±11.7Wo2.2±1.3 (Fs1.3-29.4Wo0.7-4.8, n=15); Ca-pyroxene: Fs13.4±1.2Wo49.3±0.1, n=5

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Laayoune, Morocco
Date:P 2018
Mass (g):63
Pieces:1
Class:CK3
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):33.0; 16.0
Ferrosilite (mol%):13.4; 13.4
Wollastonite (mol%):2.2; 49.3
Classifier:A. Greshake, MNB
Type spec mass (g):14.8
Type spec location:MNB
Main mass:Larbi Chnaoui
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:
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Photos:
CreditPhotos
Public domain photographs:
Ansgar Greshake      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7005 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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