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Northwest Africa 14865
Basic information Name: Northwest Africa 14865
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14865
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 306 g
Classification
  history:
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 371 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 9 May 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14865 (NWA 14865)

(Northwest Africa)

Purchased: 2022 Jan

Classification: HED achondrite (Eucrite, polymict)

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania in January, 2022.

Physical characteristics: Light grayish rock without fusion crust.

Petrography: The meteorite is a polymict breccia consisting of up to 5 mm sized basaltic and black impact melt clasts and of up to 2 mm sized mineral fragments in fine-grained clastic matrix. Main mineral phases are exsolved pyroxene, low-Ca pyroxene (about 5 vol%), zoned low-Ca pyroxene, and calcic plagioclase. Minor phases include ferroan olivine, silica, chromite, ilmenite, troilite and metallic iron.

Geochemistry: low-Ca pyroxene host to augite exsolution lamellae: Fs56.6±0.9Wo3.3±1.2 (Fs55.0-57.6Wo2.2-5.8, FeO/MnO=28-29, n=7); augite exsolution lamellae: Fs29.0±0.7Wo39.3±0.6 (Fs27.8-29.5Wo38.3-39.8, FeO/MnO=27-31, n=7); low-Ca pyroxene: Fs34.7±0.2Wo3.2±0.2 (Fs34.1-34.7Wo2.8-3.4, FeO/MnO=27-29, n=7); zoned low-Ca-pyroxene: Fs41.5±10.3Wo6.7±1.7 (Fs30.0-55.3Wo3.7-9.1, FeO/MnO=29-32, n=7); olivine: Fa57.6±0.2, FeO/MnO=45±1, n=5; calcic plagioclase: An88.8±1.3 (An87.6-91.1, n=7)

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P 2022 Jan
Mass (g):306
Pieces:1
Class:Eucrite-pmict
Shock stage:moderate
Weathering grade:low
Fayalite (mol%):57.6
Ferrosilite (mol%):56.6; 29.0; 34.7; 41.5
Wollastonite (mol%):3.3; 39.3; 3.2; 6.7
Classifier:A. Greshake, MNB
Type spec mass (g):20.3
Type spec location:MNB
Main mass:Salamu Ali
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8420 approved meteorites from (Northwest Africa) (plus 1900 unapproved names)

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