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Northwest Africa 14858
Basic information Name: Northwest Africa 14858
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14858
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 1528 g
Classification
  history:
Recommended:  CK5    [explanation]

This is 1 of 192 approved meteorites classified as CK5.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 9 May 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14858 (NWA 14858)

(Northwest Africa)

Purchased: 2022

Classification: Carbonaceous chondrite (CK5)

History: The meteorite was purchased from a meteorite dealer in Algeria.

Physical characteristics: Grayish to dark greenish rock with some fusion crust.

Petrography: The meteorite displays a dark greenish interior and is composed of sparse, clearly defined and well separated chondrules (apparent mean diameter about 750 µm) in abundant recrystallized matrix dominated by ferroan Ni-bearing olivine. Minor phases are intermediate plagioclase, low-Ca pyroxene, Ca-pyroxene, pentlandite, and troilite. Cr-rich magnetite is abundant; no metal detected.

Geochemistry: olivine: Fa27.0±0.2 (Fa26.7-27.4, FeO/MnO=101±9; NiO=0.35±0.04 wt%, n=12); low-Ca pyroxene: Fs25.4±1.4Wo0.5±0.1 (Fs23.7-28.3Wo0.4-0.7, n=6); Ca-pyroxene: Fs8.4±0.3Wo44.6±1.6 (Fs7.9-8.9Wo40.5-45.7, n=7); feldspar: An27.9-56.3Ab42.7-69.9Or1.0-2.2, n=7; magnetite contains 3.9±0.4 wt% Cr2O3, n=12

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2022
Mass (g):1528
Pieces:1
Class:CK5
Shock stage:S2
Weathering grade:low
Fayalite (mol%):27.0
Ferrosilite (mol%):25.4; 8.4
Wollastonite (mol%):0.5; 44.6
Classifier:A. Greshake, MNB
Type spec mass (g):21.6
Type spec location:MNB
Main mass:Mateusz Szyszka
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. 111, in preparation (2022)
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
MS   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8420 approved meteorites from (Northwest Africa) (plus 1900 unapproved names)

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