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Northwest Africa 14804
Basic information Name: Northwest Africa 14804
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14804
Observed fall: No
Year found: 2021
Country: Algeria
Mass:help 751 g
Classification
  history:
Recommended:  Howardite    [explanation]

This is 1 of 427 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 1 Oct 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14804 (NWA 14804)

Algeria

Find: 2021

Classification: HED achondrite (Howardite)

Physical characteristics: Dark stones. Cut surface reveals a light-gray interior with dark and light mm-sized clasts.

Petrography: (J. Gattacceca, CEREGE) Mineral and lithic clasts set in a clastic matrix. Mineral clasts are pyroxene, typically 600 µm in size. Lithic clasts have subophitic texture and contain pyroxene, plagioclase, and accessory chromite, ilmenite, troilite, a silica polymorph and FeNi metal. A 300 µm CM-like clast is present in the polished section. Electron probe microanalyses reveal that pyroxene have diogenitic and eucritic compositions. The proportion of diogenitic material is > 10%.

Geochemistry: Diogenitic pyroxene Fs28.0±4.8Wo3.7±1.5, FeO/MnO = 29.7±1.7 (n=5). Diogenitic pyroxene Fs50.1±8.0Wo6.0±5.6, FeO/MnO = 32.0±3.9 (n=6).

Classification: Achondrite (howardite). Contains carbonaceous chondrite clasts.

Specimens: Type specimen at CEREGE. Main mass with Isabelle Pothier.

Data from:
  MB111
  Table 0
  Line 0:
Date:2021
Mass (g):751
Pieces:13
Class:Howardite
Weathering grade:low
Ferrosilite (mol%):40.1±12.9 (n=11)
Wollastonite (mol%):4.9±4.4
Magnetic suscept.:3.60
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):20.5
Type spec location:CEREGE
Main mass:Isabelle Pothier
Finder:anonymous
Comments:work name CM99; submitted by Jérôme Gattacceca
Institutions
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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Photos:
CreditPhotos
Public domain photographs:
Jerome Gattacceca   
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1236 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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