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Northwest Africa 13930
Basic information Name: Northwest Africa 13930
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13930
Observed fall: No
Year found: 2020
Country: Algeria
Mass:help 92 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 241 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 29 May 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13930 (NWA 13930)

Algeria

Find: 2020

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased online by Raymond Borges around October, 2020 from Mostafa Hnini.

Physical characteristics: Single stone with no fusion crust and containing small weathering veins.

Petrography: (D. Sheikh, FSU) Sample is a fragmental breccia containing angular to sub-rounded clasts (up to 1.3 cm) primarily composed of anorthite (some partially converted to maskelynite) and smaller amounts of olivine and pyroxene set in a fine-grained matrix containing areas of shock melt veins and vesicles. Accessory phases include troilite, SiO2-rich glass, chromite, and ilmenite.

Geochemistry: Olivine (Fa44.6±11.3, range Fa21.4-57.6, Fe/Mn=75±11, n=18), Low-Ca Pyroxene (Fs38.6±6.9 Wo3.5±0.9, range Fs30.6-50.6 Wo2.2-4.6, Fe/Mn=48±5, n=7), Pigeonite (Fs39.2±4.3Wo11.3±4.4, range Fs32.3-46.3Wo6.9-21.9, Fe/Mn=51±8, n=13), Augite (Fs21.7±3.2Wo39.8±2.2, range Fs16.3-23.8 Wo37.5-42.6, Fe/Mn=55±6, n=5), Plagioclase (An97.0±0.6, range An96.1-98.4, n=34).

Classification: Lunar (feldspathic fragmental breccia).

Specimens: 19.3 g at Cascadia; main mass with Raymond Borges and Ily Valenzuela.

Data from:
  MB110
  Table 0
  Line 0:
Date:2020
Mass (g):92
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):44.6±11.3
Ferrosilite (mol%):38.6±6.9, 39.2±4.3, 21.7±3.2
Wollastonite (mol%):3.5±0.9, 11.3±4.4, 39.8±2.2
Classifier:D. Sheikh, FSU
Type spec mass (g):19.3
Type spec location:Cascadia
Main mass:Raymond Borges and Ily Valenzuela.
Comments:Submitted by Daniel Sheikh
Institutions
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010)
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 1140 approved meteorites from Algeria (plus 27 unapproved names) (plus 4 impact craters)

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