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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 598 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 Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 48 approved meteorites from Tindouf, Algeria (plus 1 impact crater)
     This is 1 of 1166 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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