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Northwest Africa 14319
Basic information Name: Northwest Africa 14319
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14319
Observed fall: No
Year found: 2021
Country: Morocco
Mass:help 76 g
Recommended:  CM2    [explanation]

This is 1 of 622 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Comments: Approved 11 Nov 2021
Writeup from MB 110:

Northwest Africa 14319 (NWA 14319)


Purchased: 2021 August

Classification: Carbonaceous chondrite (CM2)

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

Physical characteristics: Many small dark grayish to black and brown individuals mainly without fusion crust.

Petrography: Carbonaceous chondrite composed of small (apparent mean diameter about 300 µm) chondrules, chondrule pseudomorphs, mineral fragments, and rare CAIs many of which surrounded by fine-grained dust rims set into abundant fine-grained matrix. Matrix is Fe-rich with abundant Fe-sulfides and rare Ca-carbonates. Low analytical totals of matrix analyses suggest the presence of hydrous phyllosilicates. No apparent lithologies with different petrologic type on thin section scale.

Geochemistry: The olivines and low Ca-pyroxenes are highly variable in composition with Fa0.4-38.4 (mean Fa4.1±7.5; n = 31) and Fs0.7-4.6 (mean Fs1.6±0.8; n = 30). Oxygen isotopic composition (A. Pack, UGött): δ17O = -1.437, δ18O = 3.504 (all permil).

Classification: Carbonaceous chondrite (CM2)

Data from:
  Table 0
  Line 0:
Origin or pseudonym:Desert
Place of purchase:Dealer in Morocco
Date:P 2021 August
Mass (g):76.0
Shock stage:S1
Weathering grade:low
Fayalite (mol%):4.1±7.5 (n=31)
Ferrosilite (mol%):1.6±0.8 (n=30)
Wollastonite (mol%):1.2±0.6 (n=30)
Classifier:K.Klemm, M.Patzek
Type spec mass (g):17.6
Type spec location:IfP
Main mass:Gregor Pacer
Comments:Working name: CM Markus; submitted by Klemm K.
Plots: O isotopes:  
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
UGött: Geowissenschaftliches Museum, Georg-August-Universität Göttingen, Goldschmidtstr. 3, 37077 Göttingen, Germany; Website (institutional address; updated 26 Nov 2020)
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 1973 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater)

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