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Northwest Africa 14128
Basic information Name: Northwest Africa 14128
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14128
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 346 g
Recommended:  CK5    [explanation]

This is 1 of 205 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 23 Aug 2021
Writeup from MB 110:

Northwest Africa 14128 (NWA 14128)

(Northwest Africa)

Purchased: 2021 May

Classification: Carbonaceous chondrite (CK5)

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania, in May, 2021.

Physical characteristics: Dark-grayish rock partly covered with fusion crust.

Petrography: The meteorite displays a fresh grayish interior and is composed of sparse, separated, and still clearly defined chondrules (apparent mean diameter about 750 µm) set in abundant recrystallized matrix. The dominating mineral phase is ferroan Ni-bearing olivine. Minor phases are intermediate plagioclase, low-Ca pyroxene, Ca-pyroxene, troilite, and pentlandite. Cr-rich magnetite is abundant; no metal was found in the section studied.

Geochemistry: olivine: Fa31.5±0.1 (Fa31.3-31.6, FeO/MnO=111±12; NiO=0.52±0.03 wt%, n=6); low-Ca pyroxene: Fs26.3±0.2Wo1.6±1.2 (Fs26.0-26.5Wo0.9-3.7, n=4); Ca-pyroxene: Fs10.0±1.0Wo46.9±1.1 (Fs8.9-11.5Wo45.2-48.0, n=4); feldspar: An20.5-77.7Ab22.0-72.6Or0.2-6.9, n=4; magnetite contains 5.6±0.1 wt% Cr2O3, n=4

Data from:
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P 2021 May
Mass (g):346
Shock stage:S1
Weathering grade:low
Fayalite (mol%):31.5
Ferrosilite (mol%):26.3; 10.0
Wollastonite (mol%):1.6; 46.9
Classifier:A. Greshake, MNB
Type spec mass (g):21.3
Type spec location:MNB
Main mass:Salamu Ali
Comments:Submitted by Ansgar Greshake
   and collections
MNB: Museum f├╝r Naturkunde, Invalidenstra├če 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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     This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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