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Northwest Africa 14110
Basic information Name: Northwest Africa 14110
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14110
Observed fall: No
Year found: 2021
Country: Algeria
Mass:help 700 g
Classification
  history:
Recommended:  CO3    [explanation]

This is 1 of 616 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 31 Aug 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14110 (NWA 14110)

Tindouf, Algeria

Purchased: 2021

Classification: Carbonaceous chondrite (CO3)

History: (C. Muñecas, Expometeritos) Two pieces weighing a total of 700 g that fit together were found near Tindouf. The meteorites were eventually purchased by Carlos Muñecas from a dealer in Tindouf.

Physical characteristics: Samples have a brown, weathered exterior and irregular shape.

Petrography: Description and classification: (A. Love, App) Sample shows chondritic texture composed of chondrules, fragments, isolated zoned olivine grains and CAIs set within a fine-grained partially recrystallized matrix containing some FeNi metal. Sample contains abundant FeO-rich olivine chondrules and lacks the abundant AOA’s that characterize many CO chondrites. Chondrules have an average apparent diameter of 204 μm (n=123). Additional minerals are: hercynitic spinels, chromite, FeNi metal, troilite and apatite.

Geochemistry: (A. Love, App) Olivine Fa22.0±15.6 (Fa0.5-49.1, Fe/Mn=96.1±37.4, Cr2O3 in ferroan olivine=0.1±0.2 CV=71%, n=30); low-Ca pyroxene Fs6.4±8.0Wo1.5±1.6 (Fs0.1.4-28.1Wo0.4-4.6, n=11).

Classification: Carbonaceous chondrite (CO3 estimated subtype CO3.5) Based upon chondrule size, presence of CAIs and magnetic susceptibility, sample is a CO. Poorly equilibrated mineral compositions, mean and CV of olivine Fa, dominant blue CL signatures (Sears et al., 1991) and iron-enrichment textures in olivine (Scott and Jones, 1990) suggest the sample is CO3.5.

Specimens: Carlos Muñecas (Expometeoritos) holds the main masses. A polished thin section and a 27.32 g end cut are on deposit at App.

Bibliography:
  • Scott E. R. and Jones R. H. (1990) Disentangling nebular and asteroidal features of CO3 carbonaceous chondrite meteorites. Geochim. Cosmochim. Acta 54, 2485–2502 (link)
  • Sears D. W. G., Batchelor J. D., Lu J., and Keck B. D. (1991) Metamorphism of CO and CO-like chondrites and comparisons with type 3 ordinary chondrites. Proceedings of the NIPR Symposium on Antarctic Meteorites 4, 319–343. (link)
Data from:
  MB110
  Table 0
  Line 0:
State/Prov/County:Tindouf
Place of purchase:Tindouf
Date:P 2021
Mass (g):700
Pieces:2
Class:CO3
Shock stage:C-S3
Weathering grade:W2
Fayalite (mol%):22.0±15.6
Ferrosilite (mol%):6.4±8.0
Wollastonite (mol%):1.5±1.6
Magnetic suscept.:4.12
Classifier:A. Love, App
Type spec mass (g):27.32
Type spec location:App
Main mass:Carlos Muñecas (Expometeoritos)
Comments:Submitted by Anthony Love
Institutions
   and collections
NIPR: Antarctic Meteorite Research Center, National Institute of Polar Research, 10-3 Midori-cho, Tachikawa, Tokyo 190-8518, Japan; Website (institutional address; updated 9 Dec 2013)
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
Catalogs:
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
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 50 approved meteorites from Tindouf, Algeria (plus 1 impact crater)
     This is 1 of 1232 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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