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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:
Meteoritical Bulletin:  MB 111  (2023)  CK5
Recommended:  CK5    [explanation]

This is 1 of 217 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 Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
MS   
Robert Smart      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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