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Northwest Africa 14340
Basic information Name: Northwest Africa 14340
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14340
Observed fall: No
Year found: 2017
Country: Algeria
Mass:help 8.3 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 280 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 31 Oct 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14340 (NWA 14340)

Algeria

Purchased: June 2017

Classification: Lunar (feldspathic breccia)

History: Purchased by R. Hilts in 2017 from Gary Fujihara, via the Internet, on behalf of MacEwan University. Fujihara had purchased the meteorite from nomads who reportedly found the meteorite in Algeria, in the same general area as NWA 11273.

Physical characteristics: A single 8.26-g stone with minor orange staining on the outer surface and no visible fusion crust. A broken surface reveals submillimeter to millimeter-size light grey to white clasts embedded in a dark matrix.

Petrography: (T. Mijajlovic, UAb and E. Walton, MU) The meteorite is a clast-rich, matrix-supported breccia. Petrographic and electron microscope examination of a thin section reveals mineral and lithic clasts, with major minerals plagioclase, olivine and pyroxene. Minor minerals include silica, ilmenite, troilite, and FeNi metal. Clasts are set in a fine-grained matrix that is partially shock melted, flow-textured and vesiculated. Lithic clasts, in descending order of abundance, include norite, olivine-gabbro, basalt and devitrified glass. Some clasts contain vesiculated anorthite or partially melted anorthite/pyroxene. Terrestrial weathering products include fracture- and vug-filling calcite and barite.

Geochemistry: Olivine (Fa17.4-35.4, FeO/MnO = 88.2 ± 5, N = 21), low-Ca pyroxene (En55.7-78.2Wo2.5-11.2, FeO/MnO = 52.3±4, N = 26), augite exsolution lamellae (En15.6-16.2Wo40.3-40.9, FeO/MnO = 46.5±4, N = 8), and anorthite (An92.0-An98.1). Oxygen isotope values linearized to a slope of 0.528 (K. Ziegler, UNM): δ17O = 3.003±0.061, δ18O = 5.792±0.134, Δ17O = -0.054±0.010 (N=3).

Classification: Lunar, feldspathic regolith breccia, based on the presence of FeNi metal grains and a partially glassy spherule.

Specimens: 2.0 g type specimen held at UAb. Main mass and one polished thin section at MU.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Internet
Date:P June 2017
Mass (g):8.26
Pieces:1
Class:Lunar (feldspathic breccia)
Shock stage:High
Weathering grade:Low to m
Classifier:T. Mijajlovic UAb, E. Walton MU
Type spec mass (g):2.00
Type spec location:UAb
Main mass:MU
Comments:MU: 10700 104 Avenue, MacEwan University, Edmonton, AB, T5J 4S2, Canada; submitted by C. Herd
Plots: O isotopes:  
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011)
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 1208 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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